PLATE XIV 



Figure 1. The parts of the exoskeleton of Culex fatig&ns. The 

 dotted areas indicate soft membrane. The area of 

 membrane at the wing base is shaded darkly, pg., 

 patagia. eps'., episternum of prothorax. sc"., scutum 

 of mesothorax. scl'., scutellum. mtn'"., metanotum 

 (post scutellum, see page 74). h., halter, cv. s., 

 cervical sclerite. ex'., ex"., ex"., coxae of the three 

 legs, ms"., mesosternum. The prosternum does not 

 appear on the lateral wall, ms'"., the metasternum. 

 eps'"., the episternum of the metathorax. a.s., 

 anterior spiracle, p.s., posterior spiracle. The seg- 

 ments of the abdomen are numbered in order. 



Figure 2. The thorax of Tabanus albimedius, seen from the 

 inner aspect after dissection, pn'., pronotum. psc"., 

 prescutum. t'., tergite of the first segment of the 

 abdomen. s'., its sternite. epm'., epimerum of 

 prothorax. eps'., episternum of prothorax. mb., 

 membrane in the cervical region, j'., j"., j'"., the 

 three jugular sclerites. f.l., the space for the articula- 

 tion of the foreleg, ps'., presternum. st'., sternum of 

 prothorax. st!'., sternellum. cxp., coxal plate, 

 epm"., epimerum of mesothorax. mph"., mesophragma. 

 Other letters as in Figure 1. 



The sclerites controlling the movement of the wing are 

 indicated, somewhat diagrammatically, in black. 



Figure 3. The ventral plate of the ovipositor of Haematopota 

 pluvialis. X 50. 



Figure 4. The plates which make up the dorsal wall of the ovi- 

 positor of same. They are easily recognizable as 

 degraded tergites of suppressed segments, x 50. 



