[249] HYMENOPTERA 255 



metathorax alutaceous, without trace of carinae. The abdomen is much 

 compressed towards apex, black and shining, with the lateral mem- 

 branous margins of the first segment yellowish ; the plate of the first 

 segment is long, narrowed towards apex, fully thrice as long as wide 

 at base ; the second segment is shorter than the third, with two oblique 

 furrows, the plate formed by the furrows being trapezoidal in outline 

 and very delicately aciculate. 



Male. Differs from female in being longer and with longer an- 

 tennae, in having the apical half of the hind tibiae and their tarsi fus- 

 cous, and in having the lateral margins of the first and second segments, 

 and the third suture, yellowish. 



Type. Cat. No. ^706, U. S. Nat. Museum. From St. Paul Island, 

 August 16 (Fur Seal Commission). Four specimens. 



Genus Apanteles Forster. 

 APANTELES YAKUTATENSIS sp. nov. 



Female. Length 2.5 mm. Black; mandibles, except at base and 

 the teeth, rufous; palpi yellowish; legs, except coxae, first joint of 

 trochanters, apices of hind femora, and their tarsi ferruginous; coxae 

 and first joint of trochanters black ; apices of hind femora and their 

 tarsi fuscous ; middle and front tarsi above subfuscous. Wings hya- 

 line, the stigma and apices of the costas dark brown, the internal veins 

 paler, the costal veins toward base yellowish, the tegulaa piceous black. 



The head above is polished, impunctate, the face sparsely but dis- 

 tinctly punctate ; thorax above, except a space laterally above and in 

 front of the tegulaa, closely punctate; the scutellum is smoother nearly 

 so ; the mesopleura on disk above and beyond the median impression are 

 smooth and highly polished but anteriorly and below the middle they 

 are finely punctate ; while the metathorax is rather coarsely rugose, 

 the median carina being almost entirely obliterated. The abdomen, 

 except the first and the second segments which are rugulose, is smooth 

 and polished ; the third dorsal segment is somewhat shorter than the 

 second. 



Type. Cat. No. 5707, U. S. Nat. Museum. From Yakutat, June 

 21. Two specimens. 



Genus Microplitis Forster. 



MICROPLITIS ALASKENSIS sp. nov. 



Female. Length 3.6 mm. Black, closely punctate; palpi yellow, 

 with the basal joints black ; legs ferruginous, with all coxag and tro- 



