l82 ASHMEAD 



nervure a little beyond the middle ; while the petiole of the abdomen 

 is stouter, finely coriaceous, except at apex, with the spiracles normal. 

 Type. — Cat. No. 5591, U. S. Nat. Museum. From St. Paul 

 Island (Fur Seal Commission). 



BATHYMETIS BICOLOR sp. nov. 



Female. — Length 5 to 5.5 mm. Head, thorax, antennae, coxae, 

 first joint of trochanters, and basal segment of abdomen, except some- 

 times apically, are black ; rest of legs and abdomen red, sometimes 

 the basal two or three joints of the antennae are more or less ferrugi- 

 nous. The head is transverse, the temples rounded. The antennae 

 are 20-jointed, the flagellum being thickened towards apex, the 

 first joint of same being the longest joint, about twice as long as thick 

 at apex, the following joints to the 5th gradually shortening, joint 6 

 and those beyond being a little wider than long, the last oblong. Wings 

 oblong, the stigma and veins brown, the epiteguls yellowish-white, 

 the areolet receiving the second recurrent nervure at or very near its 

 middle. 



Male. — Length 5.5 to 6 mm. Agrees well with the female in 

 color except that the apex of the fourth abdominal segment and the fol- 

 lowing segments are black, while the antennae are longer, filiform, 24- 

 jointed, the third joint only a little longer than the fourth, the follow- 

 ing joints to the last very gradually and slightly shortening, but none 

 wider than long. 



Type. — Cat. No. 5592, U. S. Nat. Museum. From Berg Bay, 

 June 10. 



Genus Plectocryptus Thomson. 



Two species taken in Alaska belong in this genus ; they may be sep- 

 arated as follows : 



I . Ferruginous, with sutures of thorax black. 



Antennae less than 26-jointed 2 



Antennae 26-jointed. 



Flagellum black, joints 6 to 12 jellowish-white, the second and third 

 joints about equal in length, not much longer than thick at apex, 

 shorter than the first P. yakutatensis. 



2. Antennae 24-jointed, brownish-yellow to joint 14 or 15, bejond fuscous 

 or black ; flagellar joints 2 and 3 equal, scarcely longer than thick and 

 shorter than the first P. popofensis. 



