A bibliography of the Czechoslovak dipterological literature 1966-1975 represents a continuation of the Bibliography of Diptera in Czechoslovakia 1758-1965, Taxonomy and Faunistics (R o z k o š n ý, 1971) trough its conception is somewhat different. The presents bibliography includes not only the systematic and faunistic papers by the Czech and Slovak dipterists but also publications from the field of general and applied dipterology. Published entomological studies of a broader scope based partly on dipterological materials or embracing notes on Diptera are also recorded.
In addition to the papers dealing with the native fauna, studies concerning some exotic groups, worked up by our authors or in co-operation with foreign specialists, are also quoted. A brief review of the progress of our dipterology shows a distinct development in this branch of entomology in the territory of Czechoslovakia during the last decade. The appurtenant list titles is appended by a comprehensive subject index. Altogether, 1062 quotations by native authors are registered and 14 citationsof papers by foreign authors, including records from Czechoslovakia, are added. The scientific activity of our authors is documented also by a list of taxe described in the period 1966-1975 (partly in co-operation with foreign dipterists) which contains 229 new taxa.
The bibliography would never have been compiled without the great support and extensive help of all our dipterists and many of our other specialists who kindly checked lists of their publications. My thanks are due also those colleagues who kindly provided me with some rare journals or reprints. Last, but not least, I should like to express sincere thanks to my wife for her exceeding understanding all my work.

CZECHOSLOVAK DIPTEROLOGY DURING 1966-1975

The development of Czechoslovak dipterology from 1966 on is characterized by expressively increased publishing activity production of papers which represent mostly modern, exhaustive and truly professional approach to the study of taxonomy and faunistics as well as to the study of various branches of applied dipterology. Comparing the production of dipterological papers by our authors after World War II, it can be stated that during the 20 years in the period 1945-1965 not more than 300 titles concerning Czechoslovak Diptera were published (cf. L a š t o v k a, R o z k o š n ý & Z u s k a, 1967), while in the evaluated last decade, 1966-1975, more than 1000 papers have been registered (although partly dealing with faunas exotic to us).
Requisite attention has also been paid to basic faunal and systematic research. Consequently, an increased interest in the families and groups of our Diptera that have not been previously known satisfactorily can be admitted with a gratification. Besiders more or less traditional research in some groups of public health importance (Culicidae, Simuliidae, recently also welcome interest in Ceratopogonidae) continued attention has been paid to other parasitic groups (Tabanidae, Gasterophilidae, Oestridae, Hypodermatidae, and Pupipara), to synanthropic flies and to a study of parasitic Diptera as a potential means of biological control (aphidophagous Syrphidae, malacophagous Sciomyzidae, and enthomophagous Tachinidae). At the present time almost a third of all regulary published insect taxonimists in Czechoslovakia are dipterists (cf. H ů r k a & Š t y s, 1975). Generaly good standard papers have been more or less regulary published by about 40 Czech and Slovak authors. This nimber of specialists is remarkable also in comparison with other European countries. According to the synopsis of faunistic knowlege of Diptera families occuring in Czechoslovakia (R o z k o š n ý, L a š t o v k a, Z u s k a & Ch v á l a, 1974) the following research level has been reached:

1. of 105 families occuring in the ČSSR one-fourth (i. E. 26 families: Ptychpteridae, Blephariceridae, Chaoboridae, Culicidae, Similiidae, Thaumaleidae, Diadocidiidae, Hyperoscelididae, Bibionidae, Athericidae, Rhagionidae, Solvidae, Stratiomyidae, Tabanidae, Therevidae, Conopidae, Ulidiidae, Sepsidae, Sciomyzidae, Piophilidae, Eginiidae, Gasterophilide, Hippoboscidae, Nycteribiidae, Oestridae and Hypodermatidae) have been subjected to recent taxonomic revision and the results have been completely published;
2. the majority of the families belong to the group where the revisional work is successfuly progressing but results heve not been fully published;
3. there are also families of Diptera in our country the study of which has been virtually neglected since 1945. Filling existing gaps of knowledge in some groups (e. g. Adult Chironomidae, non-biting Ceratopogonidae, some families of Mycetophiloidea, Sciaridae, Acroceridae, Scenopinidae, and some families of Acalyptrata) would be especially desirable.

A considerable amount of papers dealing with meterial from collecting trips and expeditions (to the Balkan Peninsula, Turkey, Iran, Afganistan, Mongolia, North Korea, Cuba, etc.) or materials of various extent from foreign institutions may be in most casses considered as preparatory steps to prospective monographs and proves objectively the scientific level of the authors. The effort of our dipterists in the field of taxonomy may be documented by a rapidly increasing number of new taxa described in the valorized period (altogether 228 taxa described). Personal contacts and productive co-operation between our authors and a range of specialists abroad has also an indisputable stimulating effect shown in increasing number of joint papers.
Regular meetings and seminars of Czechoslovak diptersts were excellent occasions to initiate cooperative programmes among specialists in different fields of research and from various institutions. The lst all-state dipterological seminar was held at Nitra in 1969, the 2nd at České Budějovice in 1971, the 3rd at Cikháj nr. Žďár n. S. in 1973, and the 4th at Dubová nr. Modra in 1975. While not more than 20 specialists took part in the 1st meeting, 50 participants met the last seminar at Dubová in Slovakia.
Extentive exchange of information and experiences on collecting and preparation techniques, rearing and evaluation methods was achieved also on the occasion of the specialized all-state seminar held at Praha in 1973. Proceedings of this seminar were published separately under the name "Metody používané při studiu hospodářsky důležitých dvoukřídlých" (Methods used in the study Diptera of economic importance, ÚVTI, Praha 1973).
The aspects of applied dipterology studied have been mostly based on well-developed programmes and solved more often by experienced teams. The results of investigations in the last years have been reviewed recently by D i r l b e k J. (1974a) and M a r t i n e k (1974b, 1974c). Attention of our authors was called to the bionomics, ecology and control of widely distributed pests of cereals (Oscinella frit), sugar beet (Pegomya hyoscyami), fodder plants (Dasyneura ignorata, Contarinia medicaginis, and other Cecidomyiidae), vegetables (Dasyneura brassicae and some Anthomyiidae),, and fruits (Rhagoletis cerasi). Extensive research projects concerning pests of trees and wood products resulted in studies on some forest Diptera of economic importance as Thecodiplosis brachyntera, Dasyneura laricis, etc. In addition to faunistic studies of blood-sucking Diptera, consistent attention has been given particularly to mosquitoes as virus carries, to some flies infecting domestic animals (especialy warble flies) as well as to the problems of a possible transmission of pathogenic agents by some synanthropic flies.

In our country, as well as over the World, Diptera are very often used as common laboratory and flies subjects for testing the effect of newly developed insecticides, including some prospective preparations such as chemosterilants and juvenoids. That is the main reason why the extent of papers dealing with chemical and physical methods of control tested or treated on dipterous pests is remarkably rich also in our country. The most significant results have been reached particilarly in application of some organic compounds sterilizing Diptera or influecing their fecundity, development and metamorphosis. Although the juvenoids have been tried on a rather wide spectrum of experimental subjects, some conclusions from experiments with different groups of Diptera (e.g. larvae of Chironomidae, Ceratitis capitata and some other Cyclorrhapha) seem to be very interesting also for the basic research.
In addition to a greater of authors, also a distinct improvement in the quality of a most the published papers, both technically and in formal aspects, the overreaching of traditional methods and a tendency to enlarging theoretical knowledge, may also be documented. The attained level of coordination among our dipterists and the enthusiasm, especially of our young specialists, stimulate suitable conditions for various common dipterological projects in the ČSSR (Identification key, Check-list, Monograph on bloodsucking Diptera, atc.) as well as for a successful solving the extensive tasks in the faunistic research, in the systematics, and also a gradual fulfilment of the all actual requirements of practice.