282 CONNECTICUT GEOL. AND NAT. HIST. SUm-ET [Bull. 



15. Submedian teeth of 8th sternite triangular in outline, broad basally, nar- 



rowed outwardly (Fig. 32. A) ; w'ings broad, distal section of Oh and m-cu 



narrowly and sometimes very vaguely seamed with brown flavoumbrosa 



Submedian teeth of 8th sternite slender, parallel-sided, separated from one 

 another by a broad U-shaped notch (Fig. 32, G.J) ; wings narrower, Cii 

 and 7)i-cu not seamed with darker 16 



16. Male hypopygium with 8th sternite having a median depressed lobe arising 



ventrad and slightly cephalad of the usual submedian teeth (Fig. 32. G ) 



perlongipes 



Male hypopygium with 8th sternite having only the submedian teeth (Fig. 

 32, J )" triplex 



17. Ground color of mesonotum gray or grayish, the praescutum Avith brown 



stripes ; pleura light gray 18 



Ground color of mesonotum brownish or yellovy ; pleura yellow, in cases 

 with a thin white pruinosity 20 



18. Wings with costal region and a seam along vein Cu conspicuously darker 



tlian the ground color ; cell 1st M2 short, the second section of vein Mi+; 



less than twice the basal section ; antennae short .catawba 



Wings without conspicuous darkening in costal region or along vein Cu : 

 cell 1st M« long, the second section of M1+2 nearly three times the basal 

 section ; antennae longer 19 



19. Antennae of moderate lengtli ; flagellar segments beyond basal enlarge- 



ments deeply constricted ; praescutal stripes bordered by darker to produce 

 the appearance of six narrow vittae ; male hypopygium with eighth sternite 



armed with four conspicuous lobes (Fig. 31, K) .australis 



Antennae longer ; flagellar segments not constricted beyond basal enlarge- 

 ment; praescutum with three brown stripes, at least the lateral pair entire: 

 male hypopygium with eighth sternite merely bilobed (Fig. 31, N) . .dietziana 



20. Praescutum yellow with conspicuous brown stripes : caudal margin of tergite 



of hypopygium with a broad V-shaped notch, the lobes divergent, dark- 

 colored, bordered by pale yellow (Fig. 32, D) mainensis 



Coloration not as above, the praescutal stripes not dark brown ; hypopygium 

 with tergite not notched as described 21 



21. Male hypopygium with ninth tergite (Fig. iZ, M) trifid. with three pointed 



lobes, the median one smaller; outer dististyle fleshy and setiferous, tlie 



apex a short acute point tr iton 



Male hypopygium with ninth tergite not trifid ; if with a median protuber- 

 ance, this low and obtuse ; outer dististyle not as above 22 



22. Male hypopygium with lateral lobes of tergite produced into long curved 



horns ; no median lobule ; outer dististyle produced into a long blackened 



hook tuscarora 



Male hypopygium without long curved tergal horns ; outer dististyle not pro- 

 duced into a blackened hook 23 



23. Lateral lobes of ninth tergite very broad and obtuse, somewhat truncated 



(Fig. 31, O ) duplex 



Lateral lobes of ninth tergite not truncated, either pointed (Fig. 32, E, H. L ) 

 or evenly rounded (Fig. 32, B ) 24 



24. Hypopygium with lateral lobes of ninth tergite rounded (Fig. 2,2, B) . .georgiana 

 Hypopygium with lobes of tergite acute or subacute, not evenly rounded 



(Fig. 32, E, H, L) : 25 



25. Abdominal tergites two to five, inclusive, each with a brown spot on lateral 



portion near base seminole 



Abdominal tergites without such rows of brown spots 26 



26. Praescutum opaque, with distinct stripes : wings gray, the obliterative streak 



at cord inconspicuous; hypopygium with tergite having a median lobe in 

 addition to the subacute lateral lobes ; eighth sternite without enlarged 

 spinous setae, provided with two large lobes that bear large tufts of silvery 



setae monticola 



Praescutum polished yellow or orange-yellow, without distinct stripes : wings 

 .strongly suffused with brown, the obliterative streak very conspicuous; 

 hypopygium with lateral tergal lobes only ; eighth sternite with an enlarged 

 spinous seta on either side .translucida 



