528 CONNECTICUT GEOL. AND NAT. HIST. SURVEY. [Bull. 



abdomen and legs partly castaneous ; head and thorax with ad- 

 joining umbilicate pits or punctures. 



Chalcis Fabricius. 



C. ovata Say. 



Posterior femora mostly black, with a white or yellow 

 spot at tips ; dorsum of abdomen practically impunctate ; teg- 

 ulae entirely white or yellow. Length 3.5-7 mm. 



Primary parasite on the white-marked tussock moth (Hemero- 

 campa leucostigma). Has also been bred from Chlorippe clyton 

 and Agraulis vanilla. . 



New Haven (A. E. V.). 



LEUCOSPID^. 

 But one genus of this family occurs in Connecticut. This 

 may be known by the following description. 



Leucospis Fabricius. 



Frons anteriorly not cornuted, hind margin of head not curved 

 inwardly; scutel never cordate; abdomen never pointed; front 

 tibiae as long as the femora, middle tibiae without a tooth at apex, 

 hind tibiae with two spurs at apex; ovipositor curved up over 

 the dorsum of the abdomen. 



L. affiinis Say. 



Length 6-12 mm. ; vertex more or less tinged with green or 

 purple; prothorax with the lateral and posterior margins nar- 

 rowly yellow, scutel yellow at apex; abdomen sessile or swbses- 

 sile, elongate, ovipositor reaching to base of abdomen; rest of 

 body mostly black, varied more or less with yellow, with the 

 posterior coxae from entirely black to entirely ferruginous. 



Has been bred from nests of a leaf-cutter bee (Megachile). 



Occurs throughout the state. New Haven, 21 June, 1902 (E. J. 

 S. M.) ; Rockville, 23 August, 1905 (H. L. V.). 



