102 New Species of Sierola, With Explanatory Notes. 
59. Sierola gracillima n.sp. 
@ shining black, the head a little dull; legs fuscous, antenne yellowish 
brown, outwardly infuscate. 
Head and thorax to the propodeum with a microscopically fine reticu- 
late surface sculpture; finely and somewhat remotely punctate; hairy cloth- 
ing inconspicuous. Head considerably longer than wide, width between the 
eyes equalling the length from eye to vertex, length in front of the eyes not 
great; flatly convex above and beneath; vertical margin straight, temples 
rounded, eyes flatly convex; antennz not much longer than the head, pedicel 
longer than wide, following 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; mandibles fairly stout, 
curved, concavo-convex, truncate apically and toothed, base touching the eye 
above; gula and sides of the head convex, the former medially foreshort- 
ened, as wide as long, anterior margin arcuately concave, posterior margin 
incised; abdomen elongate ovate, smooth and shining; wings subinfuscate, 
with a yellowish brown pigmentation; length 2 mms. 
Described from one female (type) collected at Punaluu, Oahu, by O. H. 
Swezey, June II, IOQIT. 
Type: Cat. No. 59, Bishop Museum. 
60. Sterola brunneipes n.sp. 
@ dull shining black, legs and antenne brown, the latter fuscous api- 
cally. 
Head and thorax with a microscopically fine reticulate surface sculp- 
ture; finely and fairly closely punctate; hairy clothing short and incon- 
spicuous. Head wider than the thorax, a little longer than wide, width 
between the eyes equalling the length from eye to vertex; convex above 
and beneath; vertical margin straight, temples rounded, eyes flat; antennz 
not much longer than the head, pedicel a little longer than wide, following 
segments as wide as or wider than long, antennal fossz deep; clypeus cari- 
nate, apically depressed and projecting slightly in front of the anterior mar- 
gin of the head, sloping at the sides, the carina extending backward on the 
top of the head beyond the base of the antennze; mandibles stout, curved, 
truncate apically and toothed, base touching the eye above; gula flatly con- 
vex, medially foreshortened, as wide as long, anterior margin nearly straight, 
posterior margin incised; abdomen elongate ovate, smooth and _ polished; 
wings subinfuscate, with a yellowish brown pigmentation; length 2.25 mms. 
Described from five females (type and paratypes) from Tantalus moun- 
tain, Oahu. Type collected by W. M. Giffard, February 16, 1916. One speci- 
men swept from Acacia koa by J. C. Bridwell, July 5, 1915, and three others 
collected on Acacia koa by J. C. Bridwell, June, 1918, paratypes. 
Type: Cat. No. 60, Bishop Museum. 
61. Sierola arida n.sp. 
? dull black, almost opaque; legs and antennze brown to fuscous. 
Head and thorax with a microscopically fine and close reticulate sur- 
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