No. 22.] HYMENOPTERA OF CONNECTICUT. 49 



interocellar furrows wanting; clypeus broadly roundly 

 emarginate; third segment of antennas longer than fourth; 

 saw-guides straight above and broadly rounded below to a 

 blunt point at apex above; body black, with labrum, 

 tegulae, and legs, except a spot on the outer margin of 



coxae, white. Length 7 mm cavata 



Antennal furrows linear, broadly interrupted on the middle 

 of the front 3 



3. Ocellar basin a distinct depression extending to median ocel- 



lus 4 



Ocellar basin wanting, or at most indicated only adjacent 

 to median ocellus; median fovea a rounded pit 5 



4. Ocellar basin a linear depression, with a distinct median 



fovea at its ventral end; ocellar furrow indicated at mid- 

 dle; interocellar furrow distinct; clypeus moderately 

 deeply, angularly emarginate, with a low broad projec- 

 tion at middle; third segment of antennae slightly longer 

 than fourth; saw-guides straight above, convex below, 

 narrowly obliquely rounded at apex; body black, with 

 clypeus, labrum, tegulae, a line on the collar, coxae at apex, 

 trochanters more or less, front femora, middle and hind 

 femora at apex, front tibiae and tarsi, middle tibiae at base 

 and beneath, and their tarsi, and hind tibiae at base, dirty 



white. Length 7 mm callosa 



Ocellar basin a broad depression with broadly sloping sides, 

 with a deep, broad median fovea at its ventral end; ocellar 

 and interocellar furrows distinct; clypeus slightly bi-emar- 

 ginate at apex, practically truncate; third and fourth seg- 

 ments of antennae subequal; saw-guides convex above, 

 convex below, broadly convexly rounded to a blunt point 

 at middle of apex; body black, with collar, tegulae, base of 



wings, and legs, white. Length 6 mm castrata 



5- Postocellar area and dorsal margin of head polished, region 

 of ocellar furrow flattened; ocellar and interocellar fur- 

 rows distinct; clypeus angularly emarginate, lobes broadly 

 rounded; third segment of antennae longer than fourth; 

 ocellar basin represented by a depression in front of me- 

 dian ocellus; median fovea deep with flaring sides; saw- 

 guides with upper and lower margins parallel and trun- 

 cately rounded at apex; body black, with clypeus at sides, 

 labrum, tegulae, collar, wings at base, and legs beyond 

 apices of coxae, except the front and middle femora more 

 or less beneath, hind femora in great part, and hind tibiae 



at apex, white. Length 6 mm celsa 



Postocellar area and dorsal margin of head finely punctate; 

 ocellar and interocellar furrows distinct; clypeus broadly, 



4 



