ARTHROPODA OF THE COMMANDER ISLANDS. 341 



segments deeply, roundedly emarginated at base and deeply sinuated beyond at sides ; 

 sheaths of ovipositor black, as long or a little longer than the hind femora. 



Type.—^o. 4046, U. S. N. M. 



Bering Island, August, 1897 (Dr. Stejneger). 



Suborder II. HEMIPTERA. 



Family OAPSID^. 



. (2) Irbisia sericans Stal. Stett. Ent. Zeit., 1838, p. 188, 64. Sahlberg, Vega Exp. Vet. Arb., p. 68. 



Copper Island, August, 1896 (Mr. Barrett-Hamilton); August, 1897 (Mr. Barrett- 

 Hamilton). 



Family COKISID^. 



(3) Corisa germarii Fieber. Species Generis Corisa, 1851, p. 38. 

 Bering Island, 1882 (Dr. Stejneger). 



Order DIPTERA. 



(By D. W. CoqiiiUeit.) 

 Family OEOIDOMYID^. 



(1) A single specimen, too much damaged for a more definite identification. 



Bering Island, July-August, 1897 (Dr. Stejneger). 



Family CHIEONOMID^. 



(2) .A badly mutilated specimen, too muob injured for even a generic identification. 



Bering Island. Collected in July-August, 1897, by Dr. L. Stejneger. 



EUTANYPUS, new genus. 



Closely related to Tanypus, but the antennae of the female are 8-jointed, of the 

 male 9-jointed, not plumose, the first joint bulbous, about three times as broad as the 

 second; joints two to seven in the female, two to eight in the male, decreasing in 

 length outwardly, the penultimate joint only slightly longer than broad, the ultimate 

 nearly as long as the three preceding joints ; eyes deeply emarginate next the antennae, 

 palpi 4-jointed. Third vein of the wings simple, the fourth issuing from the fifth near 

 its base and forking near the middle of the wing, the fifth also forking near the middle 

 of the wing, its upper branch connected with the fourth by a crossvein; small cross- 

 vein and first section of the third vein scarcely longer than broad. 



Type of genus, the following species: 



(3) Eutanypus horealis, new species. 



Female. — Head black, opaque gray pruinose, the antennae, palpi, and proboscis 

 brownish black, the antennae nearly twice as long as the head. Thorax, scutellum, 

 and abdomen black, opaque gray pruinose, the sparse hairs chieily yellow. Wings 

 one and one-half times as long as the abdomen, whitish hyaline, veins yellow or 

 brownish, the third except at its base, the fourth before its point of furcation, also its 

 posterior branch, both branches of the fifth and the whole of the sixth almost color- 

 less; the crossvein at the outer end of the second basal cell unites with the upper 



