. Brigham Young University science bulletin. Biology -- Periodicals. tion. Also, I have relabeled the longitudinal and vertical membranous clefts as the notopleural suture () and epistemal cleft {), respec- tively, to agree with Schlein's terminolog)'. I have replaced the tenns "stemopleura" and "pleurotrochantines" with "mesosternum" and "metasteniuni," respectively (^ "basisternum 2" and "basisternum 3" + "furcasterinim 3" of Schlein, loc. cit.), as used by Zeve and Howell (loc. cit.) and Maa (various papers). The
. Brigham Young University science bulletin. Biology -- Periodicals. tion. Also, I have relabeled the longitudinal and vertical membranous clefts as the notopleural suture () and epistemal cleft {), respec- tively, to agree with Schlein's terminolog)'. I have replaced the tenns "stemopleura" and "pleurotrochantines" with "mesosternum" and "metasteniuni," respectively (^ "basisternum 2" and "basisternum 3" + "furcasterinim 3" of Schlein, loc. cit.), as used by Zeve and Howell (loc. cit.) and Maa (various papers). The structure which we (Wenzel et al., 1966) called the "pleurotrochantinal lobe" is the posterior part of "furcastemum 3" of Schlein (loc. cit.). In the following descriptions, I call it the metastemal lobe ( ). In some streblids (Fig. 4A) this ascends dorsally and even unites with epimeron 3, , in the Trichohitis longipes group, Megastrebla parvior Maa, and, according to Schlein (op. cit.), in some genera of Hippo- boscidae. Male Genitalm. I have also abandoned the term "gonapophyses" and substituted "post- gonites," following Hennig (1971), Schlein and. Fig. 2. .Strncturu of head, Metelasmu (1936). Sec abbreviations in te,\t. jiscudoptertLs Co<iiiillett: A, dorsal, and B, ventral, \'ie\vs. From Jobling. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Brigham Young University. Provo, Utah : Brigham Young University
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