No. 22.] HYMENOPTERA OF CONNECTICUT. 1 39 



decidedly produced at tip, which is obtusely pointed, with a 

 rather dense tuft of hairs. Length 5.5 mm acuminata 



12. Dorsum of thorax and abdomen in great part black 13 



Dorsum of thorax and abdomen in great part ferruginous.. 16 



13. Pale, color of inner orbits interrupted; body black, with 



face below antennae, posterior and upper orbits, most of 

 pronotum, tegulse, legs except extreme bases of posterior 

 coxae and extreme bases of posterior tibi^, whitish or 

 resinous; clypeus circularly emarginate; ocellar basin dis- 

 tinctly defined; saw-guides broad, strongly acuminate at tip. 



Length 4 mm nigrita 



Pale color of inner orbits not interrupted 14 



14. Antennae entirely black; body black, with orbits, face be- 



neath antennae, pronotum, tegulae, legs, and venter of 

 abdomen, reddish yellow; head much narrower than thorax; 

 clypeus distinctly circularly emarginate; ocellar basin with 

 ridges rounded and subobsolete; saw-guides elongate, nar- 

 row, and tapering. Length 4 mm gracilis 



Antennae, at least in part, pale beneath 15 



15. Vertex roughened ; body in female black, with the face below the 



antennae, orbits, mouth-parts, angles of pronotum, tegulae, and 

 legs except extreme bases of coxae, ferruginous ; clj'-peus circu- 

 lar and moderately broadly notched with small lobes ; ocellar 

 basin distinctly defined; frontal crest strongly developed 

 and very slightly broken by median fovea; saw-guides 

 rather broad, acuminate, not very sharply pointed, hairs 

 rather long and abundant; male differs mainly in having 



a greater extent of ferruginous. Length 5 mm pallicornis 



Vertex not roughened; body in female black, with orbits, face 

 below including frontal crest, most of pronotum, tegulae, legs, 

 extreme bases of posterior coxae, more or less of central 

 portion of venter of abdomen, including terminal seg- 

 ments, and terminal dorsal segments with the cerci, ferru- 

 ginous; clypeus rather deeply and angularly notched, lobes 

 triangular; ocellar basin distinctly limited, lateral ridges 

 not very sharply raised; frontal crest prominent, slightly 

 notched at center; saw-guides broad, very slightly emar- 

 ginate beneath, rounded above, apex rounded; male dif- 

 fers in having antennae beneath and frontal crest fulvous. 

 Length 4 mm pisum 



16. Head with ridges about ocellar basin rounded, subobsolete; 



clypeus rather deeply but angularly emarginate, lobes tri- 

 angular, rounded; frontal crest broad, rounded, slightly 

 notched; body in female ferruginous, with antennae except 

 beneath, quadrate spot including ocelli, stripe on center of meso- 

 notum sometimes wanting, spot on either side of scutellum, 

 metathorax in part, basal plates, narrow basal margin of dorsal 



