Smithsonian miscellaneous collections . y retracted by 10 , atwhich time the female raised her head and scurried off. The female was de-capitated September 21, 1953. at which time she expelled this egg case. Fivenymphs, of 21 that developed, hatched, and there were 11 undeveloped eggs. Figs. 80-85. Premature expulsion of an egg case by a decapitated female ofPycnoscclus surinamensis with concurrent hatching of the eggs. Series ofphotographs taken within a 5-minute period. 80, In the few seconds thatelapsed between decapitating the insect and placing it beneath the camera,the egg case
Smithsonian miscellaneous collections . y retracted by 10 , atwhich time the female raised her head and scurried off. The female was de-capitated September 21, 1953. at which time she expelled this egg case. Fivenymphs, of 21 that developed, hatched, and there were 11 undeveloped eggs. Figs. 80-85. Premature expulsion of an egg case by a decapitated female ofPycnoscclus surinamensis with concurrent hatching of the eggs. Series ofphotographs taken within a 5-minute period. 80, In the few seconds thatelapsed between decapitating the insect and placing it beneath the camera,the egg case was ejected about half its length. 81, Nymphs began to emergethrough the suture along the dorsal edge of the egg case before it had beencompletely expelled. 82-85, Sequence of hatching of 15 nymphs from thedropped egg case. A few other eggs had developed but the nymphs failedto hatch. The embryonic membrane shed by one of the nymphs is indicatedby arrows. All figures X 1-9- SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. 122, NO. 12, PL. 11. Plate 12 Figs. 86-90. Nauphocta cinerea forming and retracting an egg case, August 18and 19, 1953. 86, 1 130 , August 18. The female is forming and extrudingthe egg case. The cephalic ends of the eggs are dorsad at this time. 87, 2 Maximum extent to which the female extruded her egg case; about30 eggs are visible beyond end of her abdomen. The egg case curves stronglyventrad, and its distal end twists to the side from contact with the axes of the eggs in the proximal end of the ootheca have been tiltedslightly to the females left. 88, 2:45 P-m- The female has retracted part of theegg case. The axes of the eggs now lie in a horizontal plane. 89, 4:40 of retraction while the insect was under direct observation. 90, 7 , August 19. The female had completely retracted the egg case into thebrood sac during the night. The female carried this ootheca until SeptemberII, 1953. when she expelled it. Only 10 embry
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