HYMENOPTERA 1 67 



EXOLYTUS UNG^ sp. nov. 



Male and Female. — Length 3 to 3.5 mm. Polished black, im- 

 punctate ; an annulus at base of first joint of the flagellum, mandibles 

 and legs, except as hereafter noted, pale ferruginous or yellowish ; base 

 of middle coxae and hind legs, except sutures of trochanters, basal two- 

 thirds of their tibiae and the tibial spurs, black ; all tarsi fuscous or 

 subfuscous sometimes ; palpi and tegulae yellowish-white. Antennae 

 20-jointed. Wings hyaline, the stigma and veins brown, the areolet 

 open behind, the transverse median nervure interstitial, or very nearly. 

 The mesopleura beneath the wings and the petiole of the abdomen are 

 impunctate although the latter sometimes exhibits a faint alutaceous 

 sculpture, more noticeable in the male. 



Type. — Cat. No. 5566, U. S. Nat. Museum. From Unga, July 21 ; 

 Unalaska, August 24. 



EXOLYTUS ALASKENSIS sp. nov. 



Female. — Length 5.5 mm. Polished black, impunctate; palpi and 

 tegulae yellowish-white, legs, except the hind coxae and the first joint 

 of their trochanters, pale ferruginous or brownish-yellow. Antennae 

 20-jointed. Wings hyaline, the stigma and veins brown, the areolet 

 closed but the closing vein is hyaline, nearly obsolete, so that without 

 care one might easily take it to be open. Abdomen much elongate, 

 twice longer than the thorax, the petiole smooth except towards the 

 base, where it is feebly alutaceous. 



Type. — Cat. No. 5567, U. S. Nat. Museum. From Popof Island, 

 July 8. One specimen. 



EXOLYTUS KINCAIDI sp. nov. 



Female. — Length 4.5 mm. Polished black, with the transverse de- 

 pressions at sides of the prothorax, the depressions at sides of scutellum 

 and mesopleura superiorly just beneath the wings, lineated ; the petiole 

 of the abdomen has a slight median furrow at its apex and some feeble 

 lineations on either side of the furrow. Mandibles and palpi black. 

 AntennjE 19-jointed. Wings hyaline, the stigma and veins brownish, 

 the areolet closed by an hyaline nervure, while the recurrent nervure at 

 apex and the disco-cubital nervure beyond the middle are broken by 

 bullce. 



Type.— Cut. No. 5568, U. S. Nat. Museum. From St. Paul 

 Island, August 15 (Fur Seal Commission). 



