[227] HYMENOPTERA 233 



shortening, the joints beyond to the last being quadrate or subquadratc, 

 not longer than wide or a little wider than long, the last joint cone- 

 shaped. Wings much abbreviated and narrowed, not reaching to or 

 much beyond the middle of the abdomen ; the tegulaa are pale yellow- 

 ish or yellowish-white ; the stigma and veins are brown, while the 

 marginal cell is usually, but not always, closed. The metathorax is 

 smooth, or at most alutaceous at apex and laterally, with the apical 

 transverse carina distinct although delicate. The abdomen is strongly 

 compressed from the second segment, shining black except the ventral 

 segments at apex which are pale yellowish or whitish ; the first seg- 

 ment laterally and at apex is finely, feebly shagreened ; the second 

 segment is feebly sculptured at its extreme base and within the basal 

 lateral angles only ; while the following are all smooth, impunctured. 

 Type. Cat. No. 5670, U. S. Nat. Museum. From St. Paul 

 Island, August (Fur Seal Commission). Fourteen specimens. 



SYNOPLUS PLEURALIS sp. nov. 



Female. Length 2 mm. Polished black, with the pleura, meta- 

 thorax, first segment of abdomen and legs light brown or brownish- 

 yellow, the palpi and tegulae white. 



The antennae are 2O-jointed, the scape fuscous, the flagellum light 

 brown. Wings much abbreviated and narrowed and very similar to 

 those in S. brevipennis, except that the stigma is scarcely developed 

 and the veins are much paler, nearly hyaline or with a yellowish tinge. 



Type. Cat. No. 5671, U. S. Nat. Museum. From St. Paul 

 Island (Fur Seal Commission 1 ). 



Genus Hypoleptus Forster. 

 HYPOLEPTUS ALASKENSIS sp. nov. 



Female. Length 2 mm. Polished black; mandibles, palpi and 

 annulus at base of the flagellum, sutures of trochanters and the second 

 joint, knees, and the tibiae and tarsi, brownish-yellow, the apex of the 

 hind tibia and their tarsi subfuscous ; flagellum brown ; apices of ven- 

 tral abdominal segments whitish. Wings hyaline, the stigma and 

 veins light brown. The antennas are 18- jointed, the flagellum very 

 gradually thickening towards apex ; the first joint of the flagellum is 

 the longest, about 3}^ times as long as thick at apex, a little narrowed 

 towards base, the following gradually shortening and thickening, the 

 three before the last being a little wider than long. 



Male. Length 3.4 mm. Differs from the female in having a 

 longer more clavate abdomen, with the first and second dorsal seg- 



