■96 CONNECTICUT GEOL. AND NAT. HIST. SURVEY. [Bull. 



Front and middle femora wholly yellow; body black, with 

 clypeus, labrum, collar, tegulae, front and middle legs 

 except a ring at apex of tibiae and apex of tarsi, posterior 

 coxae, trochanters, basal half of femora, median half of 

 tibiae, and tarsi except at apex, yellow. Length 10 mm. 



incerta 

 19. Posterior coxae wholly black; body black, with clypeus, la- 

 brum, line on collar, tegulae, trochanters, a ring on base 

 and apex of femora, front and middle tibiae and tarsi be- 

 neath, and a line on hind tibiae, white; scutellum densely 

 punctate. Length lo-ii mm externa 



Posterior coxae black, with a white spot on the side 20 



J80. Posterior orbits as densely punctate as the antennal area; 

 body black, with clypeus, labrum, two spots on occiput, 

 very narrow line on collar and tegulae, a spot on the outer 

 side of coxae, trochanters, apical half of front and mid- 

 dle femora beneath, front and middle tibiae beneath, front 

 and middle tarsi except a ring at apices of segments, 

 posterior tibiae on upper median half, and hind margin of 

 the basal plates, white. Length 10 mm tibiatcr 



Posterior orbits not as densely punctate as the antennal 

 area; body black, with clypeus, labrum, narrow line on col- 

 lar, tegulae, front coxae beneath, a spot on side of middle 

 and hind coxae, trochanters, front femora at apex be- 

 neath, front and middle tibiae beneath, front and middle 

 tarsi beneath, posterior tibiae at middle above, and pos- 

 terior tarsi beyond the apex of the metatarsi except a ring 

 at apex of each segment, white. Length 9 mm bilineata 



21. Posterior legs wholly black; body black, with base of mandi- 



bles, apical half of front femora, and tibiae beneath, white; 

 body strongly punctate throughout; wings fuliginous. 



Length 12 mm fuliginea 



Posterior legs in part white or yellow 22 



22. Posterior coxae wholly or in great part pale 23 



Posterior coxae black, with an outer pale mark 24 



23. Anterior tibiae wholly yellow (male) flavicoxa 



Anterior tibiae with a black line above (male) incerta 



24. Head with an impunctate area below median ocellus; body 



black, with clypeus, labrum, mandibles at base, line on 

 collar, tegulas, coxae at apex and a spot on outer margin, 

 trochanters, apical half of anterior femora beneath, an- 

 terior tibiae beneath, apical half of middle tibiae beneath, 

 tarsi except a ring at apices of segments, and posterior meta- 

 tarsi, white ; postocellar area distinctly separated from upper 



orbits. Length 11-12 mm propinqua 



Head without an impunctate area below median ocellus 25 



