04 New Species of Sierola, With Explanatory Notes. 
of the antenne: mandibles stout, curved, concavo-convex, truncate and 
toothed apically, base reaching the eye above; gula convex, medially fore- 
shortened, twice as wide as long, slightly depressed behind on either side of 
the median groove, anterior margin nearly straight, posterior margin incised ; 
abdomen elliptic-ovate, apically acuminate, smooth and polished; wings hya- 
line; length 3.5 mms. 
Described from one female (type) collected at Palolo, Oahu, by O. H. 
Swezey, January 3, IQI5. 
Type: Cat. No. 43, Bishop Museum. 
44. Sterola levigata n.sp. 
? unusually large; shining black, the head and thorax very dull, tro- 
chanters, tibiz, tarsi and apex of the mandibles brown, antennz fuscous. 
Head and thorax to the propodeum with a microscopically fine reticu- 
late surface sculpture, coarsely, shallowly and closely punctate and _ hairy. 
Head as wide as long, widest across the eyes, narrowing behind and in 
front, width between the eyes twice the length from eye to vertex, length in 
front of the eyes not great; convex above and beneath, vertical margin 
straight, temples rounded, eyes convex; antenne reaching the mesoscutum, 
all the segments considerably longer than wide, antennal fossz deep; clypeus 
carinate, apically depressed and 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 antenne; mandibles short, stout, 
curved, concavo-convex, truncate and toothed apically, base nearly reaching 
the eye above; cheeks extremely narrow; gula and sides of the head con- 
vex, the former medially foreshortened, twice as wide as long, slightly 
depressed behind on either side of the median line, anterior margin arcuately 
concave, posterior margin incised; propodeum finely rugulose; abdomen 
elongate ovate, smooth and polished; wings subinfuscate; length 3.75 mms. 
Described from one female (type) collected at Kilauea, Hawaii, 4000 
ft. elevation, by W. M. Giffard, October, 1915. 
Type: Cat. No. 44, Bishop Museum. 
45. Sterola tenuis n.sp. 
@ slender; shining black, the legs and antennz basally yellowish brown, 
the latter fuscous outwardly, mandibles brown except at the base. 
Head and thorax with a microscopically fine reticulate surface sculp- 
ture, fairly coarse except on the propodeum; closely, shallowly and some- 
what coarsely punctate, rather thickly clothed with long silvery-gray hairs. 
Head twice as long as wide, width between the eyes a little less than the 
length from eye to vertex; convex above, depressed in front, a little tumid 
beneath; vertical margin straight, temples rounded, eyes flatly convex; an- 
tenne a little longer than the head, pedicel longer than wide, following seg- 
ments as wide as long, antennal fosse deep; clypeus carinate, apically de- 
pressed and projecting slightly in front of the anterior margin of the head, 
declivous at the sides; mandibles fairly stout, curved, truncate and toothed 
apically, base touching the eye above; gula and sides of the head flat, the 
former convex behind, medially foreshortened but considerably longer than 
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