90 CONNECTICUT GEOL. AND NAT. HIST. SURVEY. [Bull. 



coxae, front and middle legs except a black line to the 

 base of tibiae, the apical half of the posterior coxae, the poste- 

 rior trochanters, the basal third of the posterior femora, and 

 venter of three basal abdominal segments, yellowish white. 

 Length 12 mm nova 



42. Pectus black 43 



Pectus pale; body black, with clypeus, labrum, mandibles, 



cheeks, collar, tegulae, spot above posterior coxae, pectus, 

 anterior coxae, and trochanters, white; legs except apical 

 half of posterior tibiae and their tarsi, and second to fourth 

 segments of abdomen, rufous. Length 12 mm .varians 



43. Posterior tibiae wholly black; body black, with clypeus, la- 



brum, mandibles, cheeks, spot above posterior coxae, front 

 and middle legs except a black line above beyond coxae, 

 yellow; posterior femora and abdomen beyond second 



segment rufous. Length 12 mm mutans 



Posterior tibiae wholly pale; body black, with clypeus, la- 

 brum, mandibles except at apex, cheeks, collar, a spot 

 above posterior coxae, and sides of basal plates, white; 

 tegulae, legs except anterior coxae above and femora in great 

 part, and abdomen beyond fourth segment, rufous. Length 

 12 mm montana 



44. Pectus rufous (See sec. 48) rufopecta 



Pectus black (See sec. 48) rufipes 



45. Legs black, varied with white or yellow 46 



Legs rufous, varied more or less with black or yellow 48 



46. Posterior tibiae in part pale 47 



Posterior tibiae wholly black; body black, with clypeus, la- 

 brum, mandibles, cheeks, collar, tegulae, spot above pos- 

 terior coxae, sides of basal plates, anterior pair of legs 



for the most part, middle tibiae at tip, and tarsi at apex, white ; 

 wings clouded toward apex. Length 12 mm flavomarginis 



47. Scutellum and mesopleurae black; body black, with clypeus, 



labrum, mandibles, collar, spot above posterior coxae, 

 sides of basal plates, front femora beneath, front tibiae 

 except at apex above, middle tibiae beneath, posterior tibiae 

 except apical third, and tarsi, white. Length 13 mm. cinctitibiis 

 Scutellum and mesopleurae in part pale; body black, with 

 clypeus, transverse line on vertex, labrum, collar, tegulae, 

 a spot on mesopleurae, scutellum, two spots on basal plates, 

 and a spot on posterior coxae, white; legs black, with spot 

 on front and hind coxae, trochanters, front tibiae before, 

 band on middle and hind tibiae, and bases of all the tarsal 

 segments, white. Length 12 mm decorata 



48. Pectus rufous; body black, with clypeus, labrum, mandibles, 



line on collar, tegulae, spot above posterior coxae, and some- 



