. Occasional papers of the California Academy of Sciences. spiracular lobe-- acrotergite - ? prescutum - - . tegula - - _ . pteralia \ lateral flange ,^axillary cord - — episternum -pleural suture- epimeron scutellum acrotergite--— prescutum - -pteralia. -episternum - - pleural suture-- epimeron - - acrotergite- - ^ laterotergite abdominalspiracle 1. coxa 3 A B Figure 14. Meso- and metathorax. dorsal aspect of A. Adult female, and B. Adult male. OUgotoma nigra Hagen. traced by lines of internal thickening, by the positionof the sternal apophyseal pits, and often by distribu-tion of setae. TTie
. Occasional papers of the California Academy of Sciences. spiracular lobe-- acrotergite - ? prescutum - - . tegula - - _ . pteralia \ lateral flange ,^axillary cord - — episternum -pleural suture- epimeron scutellum acrotergite--— prescutum - -pteralia. -episternum - - pleural suture-- epimeron - - acrotergite- - ^ laterotergite abdominalspiracle 1. coxa 3 A B Figure 14. Meso- and metathorax. dorsal aspect of A. Adult female, and B. Adult male. OUgotoma nigra Hagen. traced by lines of internal thickening, by the positionof the sternal apophyseal pits, and often by distribu-tion of setae. TTie sternum of a male of OUgotomanigra has been figured alongside that of the female(Fig. 15A, B) and a comparison clearly indicates thehomologies of the various areas of the composite ster-num. The subcoxal area. \erN prominent in the me-sostemum. is obsolete in the metastemum of thisspecies, but is more evident in more plesiomorphicgenera, such as Emhia. The pterothorax of more plesiomorphic Embiid-ina, such as clothodids and embiids. seems to retain man) primitive features, , broader and shorter pro-portions of the scutum with stronger lateral flanges,a broader scutellum. a partially separated prescutum,undi\ided acrotergites (notal plates), as well as cer-tain features of the sternum. Meso- and metathorax of females The meso- and metatho
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectscience, bookyear1890
