ARTHROPODA OF THE COMMANDER ISLANDS. 337 



wanting or open behind ; the transverse cubitus is short, only about two-thirds the 

 length of the first abscissa of the cubitus. Abdomen, except segments one and two, 

 which are shagreened and opaque, smooth and shining. 



Type.—Eo. 4038, U. S. N. M. 



Bering Island. One female, July, 1897 (Dr. Stejneger). 



(6) Mesoleiua stejnegm'i, Bew species. 



Female. — Length, 6.5 mm. Black, subopaque, very finely, uniformly coriaceous; 

 clypeus, mandibles, except teeth, and the palpi, white, tinged with brown; tegulsB 

 white; legs fulvous, all coxae, the apical half of hind tibias and their tarsi, black; 

 basal joint of all trochanters, more or less, and the two last joints of middle tarsi, 

 fuscous or blackish. The head is transverse, with the temples rather broad, nearly 

 as broad as the width of the eyes. Ocelli red. Anteunee 39-jointed, longer than the 

 body, brown-black, the flagellum very gradually tapering toward apex. Thorax 

 without distinct parajisidal furrows, at the most only vaguely defined anteriorly for 

 about one-third the length of the mesonotum. Metathorax nearly exareolated, with 

 only the petiolar area distinct, the spiracles round. Abdomen sessile, hardly longer 

 than the head and thorax united, the first segment long, trapezoidal, almost twice as 

 wide at apex as at base, without carinse, but with a vaguely defined median sulcus 

 extending to about two-thirds its length, the spiracles placed at the basal one-third. 

 Wings hyaline, without an areolet, the stigma and veins, except the costal veins 

 toward base, brown-black; first abscissa of cubitus much longer than the transverse 

 cubital vein; transverse median nervure joining the disco cubital cell a little beyond 

 the l)ase of the basal nervure. 



Tjfpe.— No. 3651, U. S. N. M. 



Bering Island. Described from a single specimen. Accession No. 30232, taken 

 iu July, 1895, by Dr. Leonhard Stejneger, and in honor of whom the species is named. 



(7) Atmetua inaidaris, new species. 



Male. — Length, 4 mm. Black, shining; mandibles, palpi, tegulae, and wing veins 

 at base, anterior and middle coxae at apex and their trochanters as well as the hind 

 trochanters, their tibiae at base, tibial spurs and base of tarsi, white; antennae black 

 above but beneath for two-thirds their length pale, frontal elevation at apex margined 

 with white; legs pale ferruginous, knees of anterior and middle pairs aiid base of their 

 tibiae whitish ; middle and hind coxae and hind femora black ; middle tarsi, hind tibiae 

 and tarsi, except as already noted, fuscojis. Wings hyaline, the stigma and veins 

 dark brown, the areolet very large, pentagonal. Abdomen long, linear, much longer 

 than the head and thorax united, above black, but with the extreme apical margins 

 of the second, third, and fourth segments piceous, scarcely noticeable except when 

 viewed from behind; the first, second, and base of third segments are longitudinally 

 striated or aciculated, the second and third segments with oblique lateral depressions 

 at base, those on the second being connected with a transverse depressed line at its 

 apical third and leaving a subconvex median elevation toward the base, between it 

 and the basal lateral depressions, the apex of the third segment and the following 

 segments are polished and impunctate;' beneath, except the base of the first segment 

 and the three apical segments, white. 



Type,— So. 4039, U. S, N. M. 



Copper Island. One male, August, 1897 (Mr. Barrett-Hamilton). 

 15183— PT 4^ — ^22 



