. Occasional papers of the California Academy of Sciences. lateral posterior ventral cervical sclerites cervical sclerite sternal opophysis , post sternum Figure 12. Structure of prothorax. adult male. A. Dorsal aspect, B. Ventral aspect, C. Lateral aspect. Oligotoma nigraHagen. sternums apophyseal pits are located on either sideof the posterior margin. These are transverse anddevelop internally as short, terminally-dilated, flatapodemes. The broad area between the inner ends ofthe apophyseal slits represents the point of basal con-tact of the very large first poststemum which is fusedto the p
. Occasional papers of the California Academy of Sciences. lateral posterior ventral cervical sclerites cervical sclerite sternal opophysis , post sternum Figure 12. Structure of prothorax. adult male. A. Dorsal aspect, B. Ventral aspect, C. Lateral aspect. Oligotoma nigraHagen. sternums apophyseal pits are located on either sideof the posterior margin. These are transverse anddevelop internally as short, terminally-dilated, flatapodemes. The broad area between the inner ends ofthe apophyseal slits represents the point of basal con-tact of the very large first poststemum which is fusedto the prostemum. A detailed treatment of the prothorax, includingits musculature, will be found in Bitsch and Raymond(1970). Pterothorax of males The pterothorax of alate males (Figs. 13-16) ex-hibits a number of very interesting features. Unlike ROSS: EMBIA. BIOSYSTEMATICS OF THE ORDER EMBIIDINA, PART 1 17. Figure 13. Lateral aspect of head and thorax of a male showing angle of head in repose. Somewhat distended as a resultof KOH maceration. Oligotoina nigra Hagen. corresponding somites of females which are round-ed and distended by a large, food-filled crop, thesesomites are dorso-ventrally depressed and transverse-ly rectangulate in cross-section in alate males. Males of Oligotoma nigra have a rather apomor-phic type of embiid pterothorax but adequately repre-sent general features. Most prominent is the large,elongate, triangular mesonotum (scutum 2) whichabruptly arches downward anteriorly fonning a near-ly vertical prescutum terminating in a short acrotergite (anterior notal plate) is quite similarto that of females and nymphs, being separated fromthe antecostal suture by a membrane. The anteriornotal wing processes are prominent, strongly devel-oped, with deep submembranous emai-ginations be-hind them. The posterior notal wing processes, locatednot far behind the former,
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