[231] HYMENOPTERA 237 



Genus Atmetus Forster. 

 ATMETUS INSULARIS Ashmead. 



Atmetus insularis ASHMEAD, Fur Seals and Fur Seal Islands, iv, p. 337, $, 

 1899. 



Type. Cat. No. 4039, U. S. Nat. Museum. From Muir Inlet, 

 June 12; St. Paul Island, August 22 (Fur Seal Commission). Orig- 

 inally described from Copper Island, in Bering Sea. 



The male has the upper half of the face, the clypeus, the mandibles 

 and a spot in front of the tegulae, lemon-yellow ; the front and middle 

 coxae and trochanters and the hind trochanters are yellowish-white ; 

 while the antennae are 27-jointed, the flagellum brown-black, beneath 

 towards base fulvous. 



Genus Orthocentrus Gravenhorst. 

 ORTHOCENTRUS NIGRITUS sp. nov. 



Male. Length 2.5 mm. Polished black; face below the antennae 

 but not the cheeks, lemon-yellow ; mandibles testaceous ; tegulae and 

 epitegulas yellowish-white; legs mostly black with the front coxae, 

 trochanters, femora and tibiae, except above, the sutures of middle 

 coxae and trochanters, apex of middle femora and the base of middle 

 and hind tibiae, rufo-testaceous ; wings hyaline, the stigma and veins 

 brown ; abdomen, except the first dorsal segment and base of second, 

 polished and impunctate ; the first segment is longitudinally aciculated 

 except a smooth longitudinal median space towards its base, while the 

 second segment is aciculate from the basal oblique furrows, smooth 

 and polished beyond. 



Type. Cat. No. 5676, U. S. Nat. Museum. From St. Paul 

 Island, August 22 (Fur Seal Commission). One specimen. 



Genus Phaenosemus Forster. 

 PHyENOSEMUS SITKENSIS sp. nov. 



Male. Length 4 mm. Polished black, the face distinctly, although 

 somewhat sparsely, punctate ; the upper margin of the facial elevation, 

 mandibles, palpi, scape, tegulae, apices of coxae, the trochanters, 

 knees and ventral fold yellow; remainder of legs brownish-yellow 

 except the coxae which are black, the hind femora which are brown- 

 black, the middle and front femora basally and the terminal joints of 

 the tarsi which are fuscous or duskey. The abdomen has the dorsal 

 sutures 2, 3 and 4 yellowish. Wings hyaline, the stigma and veins 

 brown, the closing vein of the areolet being pallid or subhyaline. The 



