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Superfamily Pyrrhocoroidea with its about 670 species in 71 genera is one of the smaller groups within the true bugs (Hemiptera: Heteroptera: Pentatomomorpha). The common characteristics for these bugs are aposematic coloration and absence of ocelli. Most of the species are phytophagous and some are of economic importance as cotton stainers. The superfamily is further subdivided into two families, Pyrrhocoridae and Largidae, whose phylogenetic relatioships have been a subject of only few studies so far. To help resolve this problem, both molecular and morphological phylogenetic studies are needed. Among the morphological characters of importance are external genitalia of both sexes. This thesis gives a short overview of the current phylogeny of Pyrrhocoroidea. Its main focus is on the morphology of external male and female genitalia, which is summarized and characterized for each genus, and points out some essential differences between the taxa. A table uniting terms used for the particular structures of genitalia by different authors is included.

Thesis is focused on study of phlebotomus generative attributes development and body dimension influence for some determinant notes therefore is divided into two thema parts. First thematic part of thesis is heeding to rotation of outer genitalia of chosen phlebotomus subgenus males and their representatives: Adlerius (Phlebotomus arabicus), Larroussius (Phlebotomus orientalis and Phlebotomus tobbi), Euphlebotomus (Phlebotomus argentipes), Paraphlebotomus (Phlebotomus sergenti), Phlebotomus (Phlebotomus papatasi), Lutzomyia (Lutzomyia longipalpis) and Sergentomyia (Sergentomyia schwetzi). In this parts was discovered and compared time of station of genitalia for chosen subgenera. Also the time from emergence of adults to rotation and rotation time dependence on adults daytime eclosion was measured. Times of rotation time duration including that of times from rotation beggining were at subgenuses expressively different, from S. schwetzi with the shortest rotation time of 12 hours to P. sergenti with the longest with average time rotation of 32 hours. Further were compared rotations of two genuses within subgenus Larroussius: P. orientalis a P. tobbi. Here also were each rotation times expressively different that do not validate the rotation should be specific for given subgenus. Observed was also...