New Species of Sierola, With Explanatory Notes. 79 
15. Sierola curvignatha n.sp. 
@ dull black, antenne basally, trochanters, fore-legs distally from the 
femora, middle and hind tibiz at base and apex and tarsi entirely brown. 
Head and thorax with a microscopically fine surface sculpture, rather 
closely, finely and shallowly punctate and hairy. Head considerably longer 
than wide, width between the eyes about equal to the length from the eye to 
the vertex; flatly convex above, depressed in front, tumid beneath, the great- 
est depth behind the eye; vertical margin straight, temples rounded, eyes 
flat; antennz reaching the mesoscutum, all the segments of the flagellum lon- 
ger than wide, pedicel twice as long as wide and funicle nearly so; clypeus 
spatulate, very little extended beyond the anterior margin of the head, con- 
vex apically, contracted basally by the inward extension of the antennal 
fosse; mandibles large, bent in the middle, distal portion flattened, apical 
margin oblique and toothed, base not quite reaching the eye; cheeks narrow; 
gula and sides of the head flatly convex, the former medially foreshortened 
but longer than wide, median furrow very fine, anterior margin arcuately, 
posterior margin semicircularly concave; propodeum finely rugulose; abdo- 
men short ovate, smooth and polished: wings subinfuscate; length 2.5 mms, 
Described from one female (type) collected at Kilauea, Hawaii, at the 
lumber camp, 4000 ft. elevation, by W. M. Giffard, July 4, 1018. 
Type: Cat. No. 15, Bishop Museum. 
16. Sierola emarginata n.sp. 
Plate XVI, Figure 4. 
@ shining black, legs and antennz brown to fuscous. 
Head and thorax to the propodeum with a microscopically fine surface 
sculpture, some scattered small shallow punctures on the mesonotum, the 
head a little more closely punctate and clothed with short, fine, whitish hairs. 
Head as wide as long, widest at the vertex, narrowing in front, width be- 
tween the eyes greater than the length from eye to vertex; flatly convex 
above, depressed in front, tumid beneath, the greatest depth behind the eye; 
vertical margin deeply concave, temples rounded, eyes convex; antennz lon- 
ger than the head, segments of the flagellum scarcely longer than wide, pedi- 
cel longer by a half; clypeal process a small, decurved, spatulate beak, con- 
vex above, very little extended beyond the anterior margin of the head; man- 
dibles not very stout, bent at the middle, truncate and toothed apically, base 
not reaching the eye; cheeks fairly wide; gula and sides of the head flat, the 
former medially foreshortened, wider than long, anterior margin arcuately 
concave, posterior margin incised: propodeum finely rugulose; abdomen elon- 
gate, smooth and polished; wings subinfuscate; length 2 mms. 
Described from one female (type), collected on Hawaii by Albert Koe- 
bele. Date of capture not given. 
Type: Cat. No. 16, Bishop Museum. 
17. Sierola gitfardi n.sp. 
? shining black, the legs yellowish brown, infuscate to the apex of the 
femora, antennze yellowish brown, fuscous outwardly, mandibles brown, fus- 
cous basally. 
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