No. 22.] HYMENOPTERA OF CONNECTICUT. 485 



Cercocephala Westwood. 

 C. sp. 



Attacks wood-boring larvae of the beetle family Scolytidse. 



Spalangia Latreille. 



°S. drosophilae Ashmead. 



Female : length 2 mm. ; mostly shining, blue-black ; head flat- 

 tened, covered with coarse, distant punctures, with a longitudinal 

 median groove and a triangular projection at tip, sparsely 

 pubescent, antennae 10- jointed, issuing from the extreme tip of 

 the head; prothorax elongated, scutel with a transverse row of 

 punctures posteriorly near the tip, metathorax with two longi- 

 tudinal grooves and with a double row of coarse punctures on its 

 disk, the punctures behind confluent j legs clavate, black, pubes- 

 cent, tarsi pale or reddish; wings hyaline; abdomen petiolate. 



Bred from the larva of a species of Drosophila or pomace-fly. 



°S. rugosicollis Ashmead. 



Female: length 2.5 mm.; mostly blue-black, mesonotum and 

 scutel aeneous; head and prothorax with a large impunctate 

 polished space anteriorly, but rugoso-punctate posteriorly; parap- 

 sides and scutel with some sparse round punctures, mesopleurae 

 smooth and with a median fovea; legs mostly concolorous with 

 most of body ; tarsi, except apical joint and claws, reddish yellow ; 

 scutel with a transverse row of punctures before tip, metathorax 

 carinated down the middle, the space on each side of the carina 

 rugoso-punctate; wings hyaline, veins brown, marginal vein a 

 little more than half the length of the submarginal, postmarginal 

 and stigmal veins about equal in length and three times as long 

 as thick; abdomen oval, petiolate, the petiole longitudinally 

 striated. 



°S. haematobiae Ashmead. 



Female : length 2 mm. ; mostly blue-black and highly polished, 

 impunctate except a small oval space on tne mesonotum just in 

 front of scutel ; parapsides metallic ; head smooth, with a central 

 longitudinal groove, mandibles and palpi black, antennae 10- 

 jointed, subclavate, black, pedicel twice the length of first funicu- 

 lar joi;it, the second joint of the funicle a little shorter than the 

 first, the following joints to the club quadrate in outline, club 

 seemingly fused, and about as long as the three preceding joints 



