252 ASHMEAD [246] 



APHIDIUS FRIGIDUS sp. nov. 



(PI. XI, fig. 4.) 



Female. — Length 3.5 mm. Polished black ; abdomen with its apex 

 or the sutures of the two apical segments and the apex of the second 

 dorsal segments testaceous or yellowish, or sometimes the second and 

 third segments testaceous ; mandibles, tips of palpial joints, sutures of 

 trochanters, knees and an annulus at base of flagellum, honey-yellow 

 or yellowish. Wings hyaline, the stigma pale within, the outer mar- 

 gins and the internal veins brown. 



The antennas are i6-jointed and hardly two thirds the length of the 

 body, the first three joints of the flagellum are subequal, a little more 

 than thrice longer than thick. Metathorax smooth and areolated, the 

 median carina being distinct. Abdomen elongate lanceolate, com- 

 pressed and pointed towards apex, smooth and polished, except the 

 first segment which is finely rugulose, nearly four times as long as 

 thick and with the spiracles placed before the middle. 



Male. — Differs principally in having the antennae 21 -jointed, the 

 joints of the flagellum being much shorter, the first three joints hardly 

 thrice as long as thick, while the abdomen is shorter, compressed from 

 the apex of the second segment and nearly always entirely black. 



Type.—QzX.. No. 5701, U. S. Nat. Museum. From St. Paul Island, 

 August 8 to 20 (Fur Seal Commission) . Many specimens. 



APHIDIUS PAULENSIS sp. nov. 



Female. — Length 1.6 to 2 mm. Polished black; mandibles red- 

 dish ; palpi and tegulae whitish ; first four joints of the antennae and 

 the legs brownish-yellow. Wings hyaline, the stigma lanceolate, pal- 

 lid, the outer and internal veins brownish. 



The antennae are 15-jointed, brown-black from the fifth joint; the 

 first three joints are about four times as long as thick, the following to 

 the last, shorter, the last joint being shorter than joints 13 and 14 

 united. Thorax with the parapsidal furrows incomplete, only vaguely 

 defined anteriorly, the metathorax short with a diamond-shaped areola. 

 Abdomen depressed, petiolated and terminating in a distinct ovipositor, 

 which is longer than the basal joint of the hind tarsi ; the petiole is 

 more than thrice longer than thick and finely wrinkled. 



Male. — Differs in having the antennae i8-jointed, black, except an 

 annulus at base of the third joint, and in having the legs, except the 

 sutures of trochanters, and the femora and tibiae especially of the 

 front and middle legs, beneath., which are rufo-testaceous, all black. 



