148 New Species of Sierola, With Explanatory Notes. 
talus Mountain, Oahu, collected by D. T. Fullaway, January 3, 1910. One 
specimen from Kunia, Oahu, one from Manoa Ridge, Oahu, collected by 
D. T. Fullaway, March 24, 1910, and February 13, 1917, respectively; one 
specimen from Kaumuohona, Oahu, collected by P. H. Timberlake, Septem- 
ber 9, 1917, and one specimen from S$. E. Koolau Mountains, Oahu, collected 
by J. C. Bridwell on the same day, paratypes. 
Type: Cat. No. 150, Bishop Museum. 
151. Sierola tenuiceps n.sp. 
@ slender; shining black, legs and antenne luteous, mandibles reddish 
brown. 
Head and thorax to the propodeum with a microscopically fine and 
close reticulate surface sculpture, a little coarser on the head; impunctate 
or nearly so, the punctuation extremely fine and hardly discernible; hairy 
clothing short and inconspicuous. Head nearly twice as long as wide, length 
from eye to vertex equalling the width between the eyes; flatly convex 
above, depressed in front, a little tumid beneath; vertical margin slightly 
convex, temples rounded, eyes convex; antenne a little longer than the 
head, pedicel and first funicle segment longer than wide, the following seg- 
ments as wide as long, antennal fosszee deep; clypeus short, carinate, apically 
depressed, almost perpendicular, hardly projecting in front of the anterior 
margin of the head, which is angulate, not transverse, sloping at the sides; 
mandibles slender, curved, concavo-convex, truncate apically and toothed, 
base not reaching the eye; gula and sides of the head flat, the former 
medially foreshortened, longer than wide, narrowing behind, where there is 
a shallow sulcus in the median line, anterior margin arcuately concave, pos- 
terior margin incised; propodeum rugulose; abdomen elongate ovate, api- 
cally acuminate, smooth and polished; wings subinfuscate, with a very faint 
yellowish brown pigmentation; length 2 mms. 
Described from two females (type and paratype). Type from Hono- 
lulu, Oahu, collected by J. C. Bridwell, April, 1916. Second specimen col- 
lected at Kunia, Oahu, by D. T. Fullaway, March 9, 1910, paratype. 
Type: Cat. No. 151, Bishop Museum. 
152. Sierola nitens n.sp. 
Qa little slender; shining black, the legs, mandibles and antennze 
basally yellowish brown, antennz fuscous outwardly. 
Head and thorax with a microscopically fine and delicate reticulate 
surface sculpture; impunctate and glabrous, or nearly so, the very fine pin 
punctures and short hairy clothing inconspicuous. Head longer than wide 
by a third, width between the eyes greater than the length from eye to 
vertex; flat above, tumid beneath, the greatest depth beneath the posterior 
end of the eye; vertical margin straight, temples rounded, eyes convex: 
antenne reaching the mesoscutum, all the segments longer than wide, pedicel 
and first funicle segments nearly twice as long as wide, antennal fossz deep; 
clypeus short, flat, vertical, indistinctly carinate, not projecting in front of 
the anterior margin of the head, which is angulate, not transverse; man- 
dibles slender, curved, concavo-convex, truncate apically and toothed, base 
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