NO. 6 



INSECT ABDOMEN — SNODGRASS 



27 



Hypt Eppt Papt Q 



Fig. II. — Posterior segments of a noctuid caterpillar. 



A, dorsal view. B, lateral. C, ventral. D, posterior. 



An, anus ; Eppf, epiproct ; Hypt, hypoproct ; Papt, paraproct ; Fp, postpcdes 

 (pygopods). 



Cer 



Eppt(XlT) 



A 



Fig. 12, 



iGon , , 



IXLE Sty 2Gon Papt C 



Terminal abdominal structures of odonate larvae. 



pap"tl 



A, aeschnid larva, posterior view of end of abdomen, with epiproct and para- 

 procts spread out, exposing the periproct (Prpt) containing lamina supra-analis 

 (sa) and laminae sub-anales (!a) surrounding the anus (An). B, lateral view 

 of same with parts in normal position. C, end of abdomen of larva of Archilestcs 

 grandis, showing gill plates formed of caudal filament (c/) of epiproct (Eppt), 

 and of lobes (paptl) of paraprocts (Papt). 



