112 New Species of Sierola, With Explanatory Notes. 
length from eye to vertex; flatly convex above, a little tumid beneath, deep- 
est under the eye; vertical margin straight, temples rounded, eyes flatly con- 
vex; antenne reaching the mesoscutum, all the segments longer than wide, 
pedicel and funicle more than twice as long as wide, antennal fosse deep; 
clypeus reduced by erosion from the sides to a thin carinate ridge, almost 
vertically depressed and projecting slightly in front of the anterior margin 
of the head, the carina extending backward on the top of the head beyond 
the base of the antenne; mandibles slender, curved, truncate apically and 
toothed, base touching the eye above; gula and sides of the head flat, the 
former nearly as wide as long, narrowing posteriorly, anterior margin arcu- 
ately concave, posterior margin incised, median groove shallow; propodeum 
finely rugulose; abdomen ovate, apically acuminate, as long as the head 
and thorax together, smooth and polished; wings subinfuscate, with a faint 
yellowish brown pigmentation; length 3 mms. 
Described from one female (type) collected at Kilauea, Hawaii, 4000 ft. 
elevation, by W. M. Giffard, June 7, 1908, and numbered 7. 
Type: Cat. No. 79, Bishop Museum. 
80. Sierola olympiana n.sp. 
@ dull shining black, antennze yellowish brown, fuscous outwardly, legs 
fuscous, tibiz: and tarsi yellowish brown. 
Head and thorax to the propodeum with a microscopically fine reticu- 
late surface sculpture, coarser on the head; closely and coarsely punctate ; 
clothed with fairly stiff silvery hairs. Head longer than wide by a half, 
width between the eyes a little more than the length from eye to vertex; 
flatly convex above, depressed in front, a little tumid beneath; vertical mar- 
gin straight, temples rounded, eyes flatly convex; antenne reaching the meso- 
scutum, all the segments a little longer than wide, pedicel twice as long as 
wide, antennal fosse deep; clypeus carinate, apically depressed and projecting 
slightly in front of the anterior margin of the head, which is angulate, not 
transverse, the carina extending backward on the top of the head beyond the 
anterior margin of the eyes; mandibles slender, curved, truncate apically 
and toothed, base touching the eye above; gula and sides of the head flat, 
the latter smooth and polished, the former longer than wide, narrowing 
behind, anterior margin arcuately concave, posterior margin incised; propo- 
deum finely rugulose; abdomen ovate, smooth and polished; wings sub- 
infuscate; length 2.25 mms. 
Described from two females (type and paratype). Type from Mt. Olym- 
pus, Oahu, collected by P. H. Timberlake, June 18, 1916. Second specimen, 
collected by Mr. Timberlake on the Cooke Trail, Nuuanu Valley, January 7, 
IQI7, paratype. 
Type: Cat. No. 80, Bishop Museum. 
81. Sierola tenebriosa n.sp. 
@ dull shining black, legs and antenne yellowish brown, the latter fus- 
cous outwardly, mandibles except at the base, and apex of the clypeus red- 
dish brown. 
Head and thorax to the propodeum with a microscopically fine and 
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