94 



ILLIXOIS BIOLOGICAL MOXOCRAPHS 



[264 



EXPLANATION OF PLATE 



Fig. 350. 

 yFig. 351 

 Fig. 352. 

 Fig. 353 

 Fig. 354. 

 Fig. 355 

 Fig. 356. 

 Fig. 357 

 Fig. 3S8. 

 Fig. 359 

 Fig. 360, 

 Figr 361 

 Fig. 362 

 Fig. 363, 

 Fig. 364 

 Fig. 364a 

 Fig. 365 

 Fig. 366. 

 Fig. 367, 

 Fig. 368, 

 Fig. 369, 

 Fig. 3-0, 



Mouth-parts 



Siircophaga haeiitorrhoidalis, lateral aspect. 



Miisca domcstica, lateral aspect. 



Einpis clausa, lateral aspect. 



Archytas analis, lateral aspect. 



Stoiiio.rys calcitrans, lateral aspect. 



Sipliona genicitlata, lateral aspect. 



Conops bracbyrhynchus, lateral aspect. 



Scatophaga furcata, lateral aspect. 



Olfersia ardeae, lateral aspect. 



Stylogaster biannulata, caudal aspect. 



Sciara varians, maxillae and labium, cephalic aspect. 



E.voprosopa fasciata, lateral aspect. 



Hypothetical and typical labium, mesal aspect. 



Hypothetical mouth-parts, lateral aspect. 



Bibio fenioratus, maxillae and labium, cephalic aspect. 



Eulonchus tristis, head and mouth-parts, lateral aspect. 



Trichocera biiuacula, maxillae and labium, cephalic aspect. 



Sbnulium venustuni, maxillae and labium, cephalic aspect. 



Rhabdophago strobiloidcs, maxillae and labium, caudal aspect, 



Lcia oblcctabilis, maxillae and labium, cephalic aspect. 



Lcptis vcrtcbrata, mesal aspect of glossa. 



Leptis vcrtcbrata, maxillae and labium, caudal aspect. 



