No. 22.] HYMENOPTERA OF CONNECTICUT. l6l 



Body black, with abdomen rufous; clypeus, labrum, and palpi, 

 whitish; wings strongly infuscated; legs whitish, ante- 

 rior tibiae darker. Length 6 mm cellularis 



A. debilis Say. Poquonock, 2"^ June, 1905 (H. L. V.), 



A. ruficollis Norton. Poquonock, 27 June, 1905 (H. L. V., 

 B. H. W.). 



°A. cellularis Say. Larva feeds on sweet potato. 



Hylotoma Latreille. 



Key to Species. 



1. Head, thorax, and abdomen wholly black or blue-black .... 2 

 Head, thorax, and abdomen not wholly black 4 



2. Tibiae black; wings strongly infuscated, clearer at tip, a 



darker spot below stigma. Length 8 mm ccerulea 



Tibiae in great part white 3 



3. Legs white below knees, except apices of middle and poste- 



rior tibiae and apices of each of their tarsal segments; 

 body entirely black, except parts named; wings strongly 

 infuscated, paler at apex. Length 6 mm. (male) . . . . dulciaria 

 Legs wholly pale below knees; body black or blue-black, 

 with palpi and legs beyond knees white, tip of posterior 

 tibiae and their tarsi sometimes somewhat infuscated; 

 wings smoky or hyaline, with a dark spot below the 

 stigma. Length 1 1 mm macleayi 



4. Head wholly black 5 



Head wholly or in great part pale 13 



5. Thorax wholly black 6 



Thorax wholly or in part pale 8 



6. Legs black; abdomen beyond basal plates yellow or reddish 



yellow; palpi and front tibiae infuscated. Length 8 mm. 



abdominalis 

 Legs wholly or in part pale 7 



7. Antennae usually with apical segments yellow; abdomen usu- 



ally beyond the basal plates, and legs beyond the knees, 

 yellow; wings and veins yellowish hyaline, with stigma 

 and a spot below it infuscated; remainder of body shining 



black. Length 10 mm clavicomis 



Antennae with apical segment black; abdomen with basal 

 plates and first six abdominal segments yellow; basal 

 half of tibiae white, shading to fuscous at apex; 

 wings varying from infuscated to yellowish hyaline; 

 stigma and an angular spot beneath it infuscated; remain- 

 der of body black. Length 10 mm virescens 



11 



