138 New Species of Sierola, With Explanatory Notes. 
Described from two females (type and paratype) collected on Kaala 
Mountain, Oahu, by O. H. Swezey, September 7, 1913, and August I1, 1912, 
respectively. 
Type: Cat. No. 130, Bishop Museum. 
131. Sierola quadriceps n.sp. 
@ dull shining black, legs and antenne basally yellowish brown, the lat- 
ter fuscous outwardly. 
Head and thorax to the propodeum with a microscopically fine reticu- 
late surface sculpture, coarser on the head; coarsely, shallowly and remotely 
punctate, the punctuation on the thorax rather fine; hairy clothing short and 
inconspicuous. Head as wide as long, widest across the eyes, narrowing 
behind and in front, width between the eyes greater by a half than the length 
from eye to vertex; flatly convex above, depressed in front, a little tumid 
beneath; vertical margin slightly convex, temples rounded, eyes flatly convex ; 
antenne reaching the mesoscutum, all the segments longer than wide, anten- 
nal fosse deep; clypeus carinate, apically depressed and projecting slightly 
in front of the anterior margin of the head, which is angulate, not trans- 
verse, sloping at the sides, the carina extending backward shortly on the top 
of the head; mandibles slender, curved, truncate apically and toothed, base 
not quite reaching the eye; gula and sides of the head flatly convex, the 
former medially foreshortened, wider than long, anterior margin nearly: 
straight, posterior margin incised; propodeum finely rugulose; abdomen 
ovate, smooth and polished: wings subinfuscate; length 2.1 mms. 
Described from one female (type) collected at Puuwaawaa, N. Kona, 
Hawaii, 3700 ft. elevation, by W. M. Giffard, August, 1917. 
Type: Cat. No. 131, Bishop Museum. 
132. Sierola williamsi n.sp. 
Q@ dull shining black, trochanters, front femora, apex of middle and 
hind femora, tibiz, tarsi, antenne basally and mandibles except at the base 
yellowish brown, antennz outwardly fuscous. 
Head and thorax to the propodeum with a microscopically fine reticu- 
late surface sculpture, a little coarser on the head than on the thorax; finely, 
shallowly and remotely punctate; hairy clothing short and inconspicuous. 
Head as wide as long, width between the eyes greater than the length from 
eye to vertex, length in front of the eyes not great; flatly convex above, 
depressed in front, a little tumid beneath; vertical margin straight, temples 
rounded, eyes flatly convex; antennz reaching the mesoscutum, all the seg- 
ments longer than wide, pedicel twice as long as wide, antennal fosse deep; 
clypeus short, carinate, apically depressed, almost perpendicular, and_pro- 
jecting slightly in front of the anterior margin of the head, declivous at the 
sides, the carina extending backward shortly on the top of the head; man- 
dibles fairly stout, curved, concavo-convex, truncate apically and toothed, base 
touching the eye above; gula and sides of the head flatly convex, the former 
medially foreshortened, as wide as long, a slight depression in the median 
line posteriorly, anterior margin arcuately concave, posterior margin incised ; 
propodeum rugulose; abdomen depressed, ovate, smooth and polished; wings 
fuscous; length 2 mms. 
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