No. 22.~\ HYMENOPTERA OF CONNECTICUT. 51 



body black, with collar, tegulae, legs beyond knees for 

 the most part, and caudal margin of abdominal segments, 



white. Length, 6 mm costata 



Clypeus tridentate, median tooth not more than one-fourth 

 the length of lateral lobes II 



11. Clypeus shallowly, angularly emarginate, almost truncate, 



with a small but distinct tooth, lobes angularly rounded; 

 median fovea a rounded pit opposite dorsal margin of 

 antennal fovea; front not strongly produced between an- 

 tennae; ocellar and interocellar furrows deep and distinct; 

 third segment of antennae slightly longer than fourth; 

 saw-guides slightly concave above, convex below, broadly 

 rounded to a blunt point at middle of apex; body black, 

 with labrum, collar, tegulae, front and middle legs below 

 apex of femora, and basal third of hind tibiae, white. 



Length 6 mm calda 



Clypeus distinctly, but shallowly, roundly emarginate with 

 a minute tooth, lobes acute; median fovea a pit opposite 

 the middle of antennal fovea; front strongly produced be- 

 tween antennae; ocellar and interocellar furrows distinct; 

 third and fourth segments of antennae subequal; body 

 black, with collar and tegulae white; front and middle legs 

 beyond the basal third of their femora, and hind legs be- 

 yond the apical fourth of their femora, yellowish infus- 

 cated. Length 6 mm cata 



12. Ocellar basin extending beyond median fovea to the middle 



of antennal fovea; supraclypea! area elevated; median fovea 

 but little deeper than ocellar basin; front strongly pro- 

 duced between antennae; ocellar furrow only faintly indi- 

 cated; interocellar furrow distinct; clypeus deeply roundly 

 emarginate, with a minute tooth at middle, and lobes 

 angular; third segment of antennae longer than fourth; 

 saw-guides convex above, straight below, and broadly 

 rounded at apex; body black, with clypeus, labrum, tegu- 

 lae, collar, and legs beyond coxse, white. Length 7 mm. 



caprina 

 Ocellar basin not extending beyond median fovea to the 

 middle of antennal fovea 13 



13. Clypeus broadly, shallowly, roundly emarginate 14 



Clypeus narrowly, deeply emarginate 15 



14. Ocellar basin narrow and linear, ending ventrally in a pit- 



like median fovea, but little if any wider than ocellar basin; 

 clypeus with a low, broadly rounded tooth at middle, 

 lobes rounded; ocellar and interocellar furrows distinct; 

 third segment of antennae longer than fourth; saw- 

 guides gradually converging on upper and lower margins, 

 and broadly roundly pointed at apex; body black, with 



