518 PROCEEDINGS OF THE ACADEMY OF [1895. 



7. Submedian cell of posterior wings terminating much before 



the origin of the cubital vein; thorax and legs black, not 

 spotted; abdomen reddish in greater part, not marked with 

 yellow; enclosure of middle segment striated basally. 



pictifrom. 



Submedian cell of posterior wings not, or but slightly, termi- 

 nated before the origin of the cubital vein; thorax and legs 

 spotted with pale yellow; hind femora and two basal seg- 

 ments of abdomen, reddish, the abdomiual segments above 

 with pale yellow on their apical margins; enclosure of 

 middle segment striated throughout Coquillettii. 



8. Second ventral segment not at all angular 12 



Second ventral segment prominently angular 9 



9. Middle segment coarsely rugose throughout 11 



Middle segment not rugose, the furrow forming the enclosure 



broad, crossed longitudinally by coarse ridges; flagellum 

 subclavate (third segment not fasciate; second ventral with 

 very large punctures toward the base) nigrifrons. 



10. Palpi dark; fourth dorsal abdominal segment without a fascia, 



or with a very short one mystuceus. 



Palpi in part yellow; fourth dorsal segment with a complete 

 fascia campestris.* 



11. Eyes converging but little toward the clypeus 12 



Eyes distinctly converging toward the clypeus 20 



12. At the most the middle segment and first segment of abdo- 



men rufous; space between base of clypeus and fore ocellus 



as broad, or nearly so, as long VA 



Entirely rufous, with yellow markings, the yellow bands of 

 abdomen unusually broad; middle segment yellow; space 

 between base of clypeus and anterior ocellus distinctly 

 longer than broad diversus. 



13. Middle segment and first segment of abdomen more or less 



reddish 14 



Middle segment and first segment of abdomen not reddish . . 15 



14. Last dorsal segment with a well-developed pygidial area 



which is subtriangular and rugose; second discoidal cell 

 with apical portion dark fuscous; legs variegated with red, 



black and yellow spilojiterus. 



Last dorsal segment with the pygidial area poorly developed, 

 short and broad, strongly punctured; second discoidal cell 

 pale fuscous except its lower portion; legs red, with the 

 tibiae yellow in part tricolor. 



* According to Handlirsch, the second ventral segment of mystaceus, to- 

 ward the base, is marked with deep fovete, while in campestris that segment 

 has only larger punctures toward the base. According to the specimens be- 

 fore me, consisting of a cf and ? of mvslaceus and a d campestris, this state- 

 ment should be reversed as campestris has the deep fovese and mvslaceus the 

 punctures. * 



