No. 22.] HYMENOPTERA OF CONNECTICUT. 453 



Reared from pupae of Aletia argillacea, the white-marked tus- 

 sock moth {Hemerocampa leucostigma) , fall web-worm Hyphan- 

 tria cunea, and from galls of Trypeta gibbosa on Ambrosia 

 artemisicE folia. It is believed to be hyperparasitic on the Asiatic 

 lady-bird beetle (Chilocorus similis). 



Tetrastichus Haliday. 

 °T. modestus Howard. 



Female : length i mm. ; mostly shining black, with slight 

 greenish reflections; smooth, without perceptible punctures; 

 flagel and especially the club quite hairy, antennae brown, with 

 whitish hairs ; mesonotum without a median longitudinal -sulcus, 

 submarginal vein with two bristles, veins very light brown; all 

 coxae, femora and tibiae dark brown, coxae and femora in some 

 individuals polished black, femoro-tibial articulation and tips of 

 all tibiae yellowish white, all tarsi yellowish white. Male differs 

 from female only in the longer scape, and longer, more hairy 

 flagel. 



Reared from cocoons of Apanteles edwardsi on (Pyrameis) 

 Vanessa atalanta. 



°T. semidiae (Packard). Eulophus semidice Packard. 



Female and male: length 1.85 mm.; mostly bluish green; 

 antennae brown, darker in male than in female; flagel of male 

 with many long appressed hairs ; mesonotum with a median 

 impressed longitudinal line, all tibiae and tarsi honey-yellow, all 

 coxae dark brown, yellowish at tips, front femora dark metallic 

 except at tips, mid and hind femora dark brown except at tips; 

 abdomen in female a little longer than the thorax and about as 

 broad, rounding out to the third segment, which is broadest, and 

 thence with straight sides tapering to a point, flattened ; abdomen 

 of male shorter and narrower than thorax, flattened and sub- 

 oval. 



Reared from OEneis noma var. semidea. 



°T. racemariae Ash mead. 



Female and male : length about 2 mm. ; mostly aeneous black, 

 smooth ; scape of antennae tawny yellow, flagel black ; coxae and 

 femora black, trochanters and a narrow annulus near bases of 

 tibiae piceous brown, tibiae and tarsi yellowish white; wings 

 hyaline, veins yellowish, postmarginal vein wanting. 



