No. 22.] HYMENOPTERA OF CONNECTICUT. 1 19 



16. Body black on dorsum and venter 17 



Body black, with venter and more or less of dorsum pale . . 21 



17. Head and thorax covered with long, dense pubescence; stigma 



narrow and acuminate; procidentia wide, tapering, truncate at 



tip. Length 8 mm pubescens 



Head and thorax not covered with long, dense pubescence; 



stigma broad and tapering 18 



iS. Legs pale beyond apices of femora 20 



Legs pale beyond bases of femora 19 



19. Procidentia longer than broad, truncate at apex; head with 



ocellar basin and frontal crest distinct but not strongly 

 raised; body shining black, with supraclypeal area, labrum, 

 apex of abdomen above, hypopygium, more or less of venter 

 on each side, apices of coxae, trochanters, femora except bases, 



and tibiae except apices, light fulvous. Length 5.5 mm tritici 



Procidentia broader than long, broadly rounded; ocellar 

 basin distinct, sharply raised; body black, with supraclyp- 

 eal area, labrum, apices of segments of tergum, venter, a 

 spot on pleurae, and legs, except apices of posterior tibiae 

 and their tarsi, fulvous. Length 7 mm rufocinctus 



20. Mouth-parts and orbits black; procidentia very broad, 



slightly tapering and rounded at tip extensicornis 



Mouth-parts and orbits pale; procidentia projecting only 

 about half its width, broadly truncate at apex affinis 



21. Procidentia narrow, tapering, pointed at top; body resin- 



ous yellow, with antennae, large spot on vertex about ocelli 

 extending onto occiput, thorax above except pronotum 

 and tegulae, and central dorsal area of abdomen, brownish 



black. Length 4 mm gregarius 



Procidentia very broad, tapering, squarely truncate at apex, 

 not keeled; vertex rugose; ocellar basin with indistinct 

 walls, median fovea extending laterally over bases of an- 

 tennae, indistinctly defined; body black, with labrum, upper 

 and posterior orbits, angles of pronotum, tegulae, outer 

 two-thirds of femora, tibiae, tarsi, and abdomen except 

 base of first dorsal segment, yellowish ferruginous; wings 

 smoky, especially centrally. Length 8 mm infumatus 



22. Procidentia rounded at apex, not constricted basally, strongly 



keeled; body black, with tip of clypeus, mouth-parts, 

 angles of pronotum, tegulae, pectus, venter of abdomen, 

 and legs except bases of coxae and apices of posterior tibiae 



and tarsi, yellowish ferruginous. Length 5 mm corniger 



Procidentia short, narrow, truncate; body black, with tip of 

 clypeus, mouth-parts, angles of pronotum, venter, and 

 legs except bases of coxae, extreme tip of posterior tibiae, 

 and all posterior tarsi, yellowish ferruginous. Length 6.5 

 mm subalbatus 



