No. 22.] HYMENOPTERA OF CONNECTICUT. I5I 



lus, angularly interrupted between the antennal sockets; the 

 supraclypeal area depressed; antennae with the third, fourth 

 and fifth segments subequal; the saw-guides concave above, 

 and broadly convexly rounded below and at apex to a point 

 above. Length 5.5 mm. 



New Haven, 28 July, 191 1 (A. B. C.) ; Farmington (E. N.). 



Monophadnoides Ash mead. 

 Key to Species. 



1. Abdomen with dorsal surface rufous 2 



Abdomen with dorsal surface black 4 



2. Front with a depression around the median ocellus more or less 



distinct but not V-shaped; body black, with tegulae, cor- 

 ners of pronotum, and legs beyond bases of femora, lute- 

 ous; abdomen with greater part of tergal segments two 

 to five rufous; front with lateral fovea; scutellum punctate 

 at apex; saw-gu'ides broad, straight above, broadly convex 

 below, oblique at apex. Length 5.5 mm rubi 



Front with a V-shaped furrow behind the median ocellus 3 



.3. Front with a triradiate depression in front of the median ocellus ; 

 antennae with third segment shorter than the fourth and fifth 

 together; body black, with tegulae, pronotum, front legs beyond 

 trochanters, and middle and hind legs beyond middle of 

 femora, luteous; abdominal segments one to five, yellow- 

 ish rufous; front with lateral fovea; saw-guides of moder- 

 ate width, straight above and below, obliquely rounded to 

 a point above at apex. Length 6.5 mm conspicuus 



Front with a deep, semicircular depression in front of the median 

 ocellus; body black, with angles of pronotum, tegulae, 

 and legs below knees, white; third segment of antennae 

 shorter than fourth and fifth together; head smooth and 

 polished ; saw-guides straight above and below, obliquely 

 convexly rounded at apex. Length 6 mm concessus 



4. Front with lateral foveae 5 



Front not with lateral fovae; if indicated, the puncture broad 



and shallow 10 



5. Scutellum wholly smooth 6 



Scutellum punctate or striate at apex 8 



•6. Antennae with second segment broader than long 7 



Antennae with second segment longer than broad; body black, 

 with collar narrowly, tegulae, and legs belov/ knees, white; 

 pentagonal area wanting; saw-guides straight above, con- 

 vex below, and obliquely, emarginately truncated at apex. 

 Length 5 mm conspiculatus 



