No. 22.] HYMENOPTERA OF CONNECTICUT. 47 



ridge wanting, median fovea coinciding with ocellar basin 

 and extending as a narrow groove to above the median 

 ocellus; wings very slightly infuscated, veins and stigma 

 brownish. Length 8 mm nigrisomus 



Abdomen black, transversely banded with rufous 2 



2. Coxae black; body black, with the following parts rufous: 

 labrum, tegulae, a band covering a part of the second 

 and the third and fourth abdominal segments, and legs, 

 except middle and posterior tarsi; third segment of anten- 

 nae longer than fourth; median fovea wanting; ocellar 

 basin distinct, its walls not prominent. Length 8 mm. 



innominatus 



Coxae in part pale; body black, with the following parts 

 rufous or white: labrum, tegulas, collar (black in male), 

 entire abdomen in female and a band on segments two to 

 four in male, apices of coxae, trochanters, femora at apex 

 and base, and base of tibiae; hind femora and tibiae in male 

 black; wings hyaline; each ocellus in a basin. Length 6 

 mm amicus 



*T. nigrisomus Norton. Larva feeds on dock. Hartford 

 (Nason) ; Branford, 15 July, 1905 (H. W. W.) ; Thompson, 11 

 July, 1905 (H. L. V.) ; Stonington, 10 August, 1906 (J. A. 

 Hyslop). 



°T. innominatus AlacGillivray. 



°T. amicus Norton. 



Monostegia Costa. 



M. martini MacGillivray. 



Body black, with the following parts rufous : labrum, collar 

 broadly, tegulae, metathorax, abdomen, legs, and base of wings; 

 second segment of antennae as long as fourth and fifth together; 

 frontal ridge wanting, and median fovea and ocellar basin united. 

 Length 7 mm. Larva feeds on CEnothera. 



Hartford (W. E. B.). 



Phrontosoma MacGillivray. 



Key to Species. 



1. Prothorax and mesonotum in great part rufous 2 



Prothorax and mesonotum black 3 



2. Antennal furrow below lateral ocelli broad and coarsely 



punctate; body black, with tegulae, a fine line on the col- 



