104 New Species of Sierola, With Explanatory Notes. 
close reticulate surface sculpture; finely and fairly closely punctate; rather 
thinly clothed with long delicate hairs. Head a little longer than wide, width 
between the eyes a little more than the length from eye to vertex; flat 
above, a little tumid beneath, the greatest depth beneath the posterior end of 
the eye; vertical margin straight, temples rounded, eyes flatly convex; 
antenne reaching the mesoscutum, pedicel a little longer than wide, follow- 
ing segments as wide as long, antennal fosse deep; clypeus short, carinate, 
apically depressed and projecting slightly in front of the anterior margin of 
the head, sloping at the sides, the carina extending backward a little on the 
top of the head; mandibles fairly stout, curved, concavo-convex, truncate 
apically and toothed, base touching the eye above; gula and sides of the 
head flat, the former medially foreshortened, as long as wide, narrowing 
behind, where it is indistinctly divided into two lobes by a shallow depression 
posteriorly on the median line, anterior margin straight, posterior margin 
incised; propodeum finely rugulose; abdomen ovate, apically acuminate, 
smooth and polished; wings subinfuscate, with a faint yellowish brown pig- 
mentation; length 2.25 mms. 
Described from two females (type and paratype) from Tantalus moun- 
tain, Oahu, 1300 ft. elevation. Type collected by W. M. Giffard January 29, 
1905. Second specimen collected by O. H. Swezey, August 4, 1912, paratype. 
Type: Cat. No. 63, Bishop Museum. 
64. Sterola picea n.sp. 
2 shining black, the head somewhat piceous; legs and antennz luteous, 
the latter infuscate outwardly, mandibles brown. 
Head and thorax with a microscopically fine reticulate surface sculp- 
ture; finely, shallowly and fairly closely punctate; thinly clothed with short, 
delicate, silvery white hairs. Head nearly twice as long as wide. width be- 
tween the eyes equalling the leneth from eye to vertex; convex above and 
beneath; temples rounded, eyes flatly convex; antenne a little longer than 
the head, pedicel twice as long as wide, following segments as wide as long 
or hardly longer, antennal fosse deep; clypeus carinate, apically depressed, 
projecting slightly 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 antennz: mandibles stout, curved, flattened outwardly, truncate 
apically and toothed, base touching the eye above; gula flatly convex, 
medially foreshortened, a little longer than wide, slightly depressed along 
the median line, anterior margin arcuately concave, posterior margin incised; 
abdomen ovate, smooth and polished; wings hyaline; length 2 mms. 
Described from one female (type) collected on Tantalus mountain, 
Oahu, 1300 ft. elevation, by W. M. Giffard, January 15, 1995. 
Type: Cat. No. 64, Bishop Museum. 
65. Sierola streblognatha n.sp. 
2 shining black, antenne basally and the legs brown, with the excep- 
tion of the femora, which are blackish in the middle. 
Head and thorax to the propodeum with a microscopically fine reticu- 
late surface sculpture, fairly coarsely, shallowly and remotely punctate and 
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