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



with antennae at apex, clypeus, labrum, mandibles at base, 

 collar, V-spot, sometimes wanting, scutellum, front legs 

 beyond basal third of femora beneath, tarsal segments at base, 

 middle femora at apex beneath, middle tibiae in part be- 

 neath, middle tarsal segments at base, a spot on hind 

 coxae, hind trochanters, hind femora beneath, and apical 

 margins of abdominal segments, white. Length 10-11 mm. 



trisyllaba 



31. Abdomen wholly or in part rufous 32 



Abdomen wholly black, or black marked with white 34 



32. Abdomen wholly rufous; body black, with clypeus, labrum, 



mandibles at base, collar, tegulae, V-spot, scutellum, post- 

 scutellum, angular spot on pleurae, front legs entirely, mid- 

 dle legs except a black line on femora, posterior coxae 

 except a black line, trochanters, basal third of femora, a 

 stripe at middle above on posterior tibiae, and posterior 

 tarsi beyond middle of metatarsi, white; two basal seg- 

 ments of antennae, abdomen including basal plates except 

 saw-guides, posterior two-thirds of femora, posterior 

 tibiae at base and apex, and basal half of posterior meta- 

 tarsi, rufous. Length 8 mm goniphora 



Abdomen wholly or in part rufous beyond second segment.. 33 



33. Vertical furrows not distinct and line-like; body black, with 



two basal segments of antennae, clypeus, labrum, mandibles, 

 collar broadly, tegulae, V-spot, scutellum, postscutellum, 

 round spot on pleurae, posterior margin of mesopleurae, 

 legs except apex of posterior femora and tibiae, and basal 

 plates, yellow; abdomen usually with the third, fourth, and 



fifth dorsal segments, rufous. Length 9-10 mm intermedia 



Vertical furrows distinct, line-like; body black, with two 

 basal segments of antennae, clypeus, labrum, mandibles at 

 base, spot on supraclypeal area, collar broadly, tegulae, 

 scutellum, postscutellum, rounded spot on pleurae, spot at 

 base of hind wings, legs (except basal half of hind coxae, 

 apical half of hind femora, and ring at apex of hind tibiae), 

 yellow; fourth and fifth segments of tergum rufous. 

 Length 12 mm formosa 



34. Head uniformly densely punctate 35 



Head with upper orbits not as densely punctate as antennal 



area 36 



35. Abdomen wholly black; body black, with two basal antennal 



segments, collar, a spot below collar on pleurae, front 

 and middle legs beyond coxae except a band at middle of 

 femora, apices of posterior coxae, their trochanters, a ring on 

 base of femora, tibiae except a ring at apex, tarsi in part, 

 and basal plates, white; body coarsely punctate. Length 

 8 mm cesta 



