No. 22.] HYMENOPTERA OF CONNECTICUT. 657 



Mesepisternum not sharply or strongly carinate anteriorly; 

 pygidium long, narrow, more than twice as long as its 

 width in the middle; form robust costalis 



H. fuscus Taschenberg. 



Flagellum of the male cylindrical except the apical joint; first 

 abdominal segment black. 



This species is recorded, without definite locality, by 

 Handlirsch. 



H. costalis Cresson. 



New Haven, 24 August, 1906 (P.L.B.). 



H. gracilis Patton. 



This species was recorded from Connecticut by Patton. 



H. phaleratus Say. Howard, Insect Book, PI. i, Fig. 18. 

 This species occurs throughout the State and has been taken 

 in July and August. 



H. nebulosus Packard. 



Scotland, 27 July, 1904 (B. H. W.) ; Branford, 12 August, 

 1904 (H. W. W.) ; New Haven, 19 July, 1904 (P. L. B.). 



°H. atricornis Packard. 



This species has been recorded from neighboring states but 

 not yet been taken in Connecticut. 



PSENIN^. 



, The abdomen is always petiolate although the length of the 

 petiole is variable. The antennae are inserted in the middle of 

 the face, well above the clypeus. The wings have three enclosed 

 cubital cells, the radial cell is always pointed at the apex. The 

 inner margins of the eyes are subparallel. The intermediate 

 coxae are separated. 



They nest either in sand or wood and provision their nests 

 with Homoptera. For an account of one of the Nearctic species, 

 see Barth, Bull. Wisconsin Nat. Hist. Soc, vol. 5, no. 4, 1907, 



pp. 251-257. 



Key to Genera. 

 Transverse median of hind wings short and perpendicular; 

 cubitus of hind wings originating beyond transverse median 



Psenulus p. 658 

 Transverse median of hind wings long, oblique or bent near 

 middle; cubitus of hind wings originating before or nearly 



interstitial with transverse median Psen p. 658 



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