118 INDEX TO MISSOURI ENTOMOLOGICAL REPORTS. 



FIG. 13. Uropoda americana Riley ; a, Colorado Potato-beetle attacked by it uat. 

 size; I), the mite, ventral view, showing the penetrating organ lying be- 

 tween the legs ; c, the organs extended ; d, the claw ; e, the excrematitious- 

 filament all greatly enlarged. 



FIG. 14. Wheat-head Army-worm (Leucania allnlinca Guen.) ; , a, larv;e; I), eggs iiat. 

 size; c, d, egg, top and side view enlarged. 



FIG. 15. Wheat-head Army- worm moth (Leucania albllinea Gnen.). 



FIG. 16. Map of North America, illustrating the country east of the Rocky Mountains- 

 overrun by the Rocky Mountain Locust in 1876. 



FIG. 17. Acridium americanum, Drury. 



FIG. 18. Rocky Mountain Locust (Caloptenus spretus Thomas); a, a, a, female in dif- 

 ferent positions, ovipositing ; b, egg-pod extracted Croin ground, with the 

 end ; c, a few eggs lying loose on the ground ; d, c, shows the earth par- 

 tially removed, to illustrate an egg-mass already in place and one being 

 placed ; /, shows where such a mass has been covered up. 



FIG. 19. Rocky Mountain Locust (Caloptenus spretus Thomas); Anal characters of 

 female, showing horny valves of ovipositor ; b, an upper valve ; c, lower 

 valve ^all enlarged. 



FIG. 20. Rocky Mountain Locust (Calopienus spretus Thomas); oviposition i, super- 

 anal plate ; li, sponge-like exsertile organ the egg passing through the 

 horny valves of the ovipositor, g. 



FIG. 21. Rocky Mountain Locust (Caloptenus spretus Thomas), egg-mass, enlarged; a f 

 side view within burrow, the line of exit of the young locusts shown at d 

 and e ; b, egg-mass from beneath ; c, same from above. 



FIG. 22. Roky Mountain Locust (Caloptenus spreius Thomas); a, egg, enlarged to 

 show sculpture of outer shell ; l>, portion of same very highly magnified j 



c, the inner shell, just before hatching ; d, e, points where it ruptures. 

 FIG. 23. Authoniyia Egg-parasite (Antliomyia radicum, Linn., var. caloptenl Riley); 



fly; b, pupariuni; c, larva, side view; d, head of same, from above en- 

 larged. 



FIG. 24. Bombyliid larva (Systoschus sp.); a, enlarged; b, head, side view, more en- 

 larged ; c, do., front view ; d, posterior spiracle. [See Notes, etc., p. 60.] 



FIG. 25. Harpalus ? larva ; a, from above ; b, head, from beneath ; c, leg enlarged ; 



d, antenna ; e, maxilla ; /, labium. 



FIG. 26. Harpalus ? larva ; A, natural size ; B, under side of head, enlarged ; c, mandi- 

 ble; e, antenna; /, labium and labial palpi; g, maxilla and maxillary 

 palpi ; h, joint 12 beneath ; i, joint 11 beneath ; j, joints 4-10 each beneath 

 enlarged. 



FIG. 27. Pennsylvania Ground-beetle (Harpalus pcnxylranivus, DeGeer). 



FIG. 28. Erax bastardi Macq. ; a, larva ; b, pupa. 



FIG. 29. Amblychila cylindriformia Say. 



FIG. 30. Hellgrammite (Corydalus cornutus, Linn.) ; , larva; 6, pupa; c, fly, male; d, 

 head of female fly. 



FIG. 31. Hellgrammite (Corydalus cornutus, Liun.); a, a, egg-masses attached; 6, one 

 detached, showing lower surface, all rather below average size ; c, a few 

 egga of the outer row ; d, the newly-hatched larva ; e, labium ; /, antenna ; 

 </, maxilla ; 7i, mandible ; /, tarsal claw ; j, anal hooks all enlarged. 



FIG. 32. Eggs of Belosloma? 



FIG. 33. Gigantic Water-bug (Belostoma grandis Linn.). 



