New Species of Sierola, With Explanatory Notes. 149 
touching the eye above; gula and sides of the head flat, the former medially 
foreshortened, as wide as long, narrowing somewhat posteriorly, where there 
is a small but deep sulcus in the median line, anterior margin almost straight, 
posterior margin incised; abdomen somewhat depressed, elongate ovate, 
smooth and polished; wings subinfuscate, with a yellowish brown pigmenta- 
tion; length 2.25 mms. 
Described from two females (type and paratype). Type from Kaala 
Mountain, Oahu, 2500 ft. elevation, collected by P. H. Timberlake on Pelea 
clusiaefolia, March 4, 1917, Second specimen, collected on Kaala Mountain, 
Oahu, by O. H. Swezey, September I, 10913, paratype. 
Type: Cat. No. 152, Bishop Museum. 
153. Sterola kaumuohona n.sp. 
@ shining black, legs and antenne basally yellowish brown, hind femora 
and antennz apically fuscous, abdomen yellowish brown to piceous. 
Head and thorax to the propodeum with a microscopically fine and 
delicate reticulate surface sculpture; coarsely, shallowly and remotely punc- 
tate; clothed with sparse, short, fairly stiff silver white hairs. Head longer 
than wide, width between the eyes more than the length from eye to vertex; 
flat above, depressed in front, tumid beneath, the greatest depth beneath the 
posterior end of the eye; vertical margin straight, temples rounded, eyes 
flat; antennz nearly reaching the mesoscutum, all the segments longer than 
wide, pedicel twice as long as wide, antennal fosse deep; clypeus carinate, 
apically depressed, not projecting in front of the anterior margin of the 
head, sloping at the sides, the carina extending backward on the top of the 
head beyond the base of the antenne; mandibles rather slender, curved, 
truncate apically and toothed, base touching the eye above; gula flatly con- 
vex, medially foreshortened, a little wider than long, narrowing behind, where 
there is a slight depression in the groove, anterior margin arcuately concave, 
posterior margin incised; propodeum very finely rugulose; abdomen elongate 
ovate, smooth and polished; wings with a deep yellowish brown to fuscous 
pigmentation; length 2 mms. 
Described from one female (type) collected on Kaumuohona, Oahu, by 
P. H. Timberlake, September 9, 1917. 
Type: Cat. No. 153, Bishop Museum. 
154. Sierola brunneiventris n.sp. 
@ shining black, legs, antenne basally and apical margin of abdominal 
segments, particularly at the sides, brown, antennz outwardly fuscous. 
Head and thorax to the propodeum with a microscopically fine and 
shallow reticulate surface sculpture; coarsely, shallowly and fairly closely 
punctate, but not uniformly so; clothed, rather thickly on the gula, with 
delicate silver gray hairs. Head wider than the thorax, longer than wide 
by a half, length from eye to vertex equalling the width between the eyes; 
convex above, depressed in front, a little tumid beneath; vertical margin 
straight, temples rounded, eyes flatly convex; antennze about as long as the 
head, pedicel a little longer than wide, the following segments wider than 
long, antennal fossz deep; clypeus carinate, apically depressed, hardly pro- 
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