New Species of Sierola, With Explanatory Notes. 167 
89. Sierola eucrena n.sp. 
@ dull shining black, legs and antenne brown. 
Head and thorax to the propodeum with a microscopically fine reticu- 
late surface sculpture, a little coarser on the head, very delicate on the scu- 
tellum; coarsely, shallowly and fairly closely punctate, and hairy. Head a 
little longer than wide, widest across the eyes, narrowing in front and 
behind, 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 margin straight, temples rounded, eyes convex; antenne reaching 
the mesoscutum, all the segments longer than wide, antennal fosse deep; 
clypeus reduced by erosion from the sides to a thin, carinate ridge, apically 
depressed and projecting slightly in front of the anterior margin of the 
head, declivous at the sides, the carina extending backward on the top of 
the head beyond the base of the antenne; mandibles slender, curved, trun- 
cate apically and toothed, base not quite reaching the eye; sides of the head 
flat, gula flatly convex, medially foreshortened, wider than long, narrowing 
behind, anterior margin arcuately concave, posterior margin incised; propo- 
deum rugulose, with a median longitudinal line dorsally: abdomen ovate, 
smooth and polished; wings subinfuscate, with a faint yellowish brown pig- 
mentation; length 2.75 mms. 
Described from one female (type) collected on Hawaii by Koebele. 
Type: Cat. No. 80, Bishop Museum. 
go. Sierola ehrhorni n.sp. 
@ shining black, a little dull on the head; antennz fuscous, trochanters, 
tibiz and tarsi yellowish brown. 
Head and thorax to the propodeum with a microscopically fine reticu- 
late surface sculpture, a little coarser on the head; fairly closely, shallowly 
and finely punctate; hairy clothing rather short and erect. Head a little 
longer than wide, widest across the eyes, narrowing behind and in front, 
width between the eyes a little more than the length from eye to vertex; 
flatly convex above, a little tumid beneath; vertical margin nearly straight, 
temples rounded, eyes flatly convex; antenne broken a little beyond the mid- 
dle, the segments of the stumps all longer than wide, antennal fossze deep; 
clypeus carinate, apically depressed and projecting slightly in front of the 
anterior margin of the head, sloping at the sides, the carina extending back- 
ward on the top of the head beyond the base of the antenne; mandibles 
slender, curved, truncate apically and toothed, base not reaching the eye; 
gula and sides of the head flat, the former medially foreshortened, scarcely 
as long as wide, narrowing behind, median groove nearly effaced, anterior 
margin arcuately concave, posterior margin incised; propodeum finely ru- 
gulose: abdomen short ovate, smooth and polished; wings subinfuscate, 
with a faint fuscous pigmentation; length 2.25 mms. 
Described from one female (type) collected at Kilauea, Hawaii, 4000 
ft. elevation, by W. M. Giffard, in January, 1916. 
Type: Cat. No. 90, Bishop Museum. 
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