New Species of Sierola, With Explanatory Notes. 121 
brown at the base, the former brown outwardly; mandibles reddish apically. 
Head and thorax with a microscopically fine reticulate surface sculp- 
ture; fairly closely, finely and shallowly punctate; hairy clothing short and 
inconspicuous. Head a little longer than wide, width between the eyes a 
little more than the length from eye to vertex, length in front of the eyes 
not great: convex above and beneath; vertical margin straight, temples 
rounded, eyes flatly convex; antenne no longer than the head, the pedicel 
longer than wide, the following segments as wide as or wider than long, 
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 backward shortly on the top of the head; mandibles stout, 
curved, concavo-convex, truncate apically and toothed, base touching the 
eye above; gula convex, somewhat foreshortened medially, as wide as long, 
with a shallow depression along the median line, anterior margin arcuately 
concave, posterior margin incised; abdomen ovate, smooth and _ polished; 
wings subinfuscate, with a faint yellowish brown pigmentation; length 2.5 
mms. 
Described from one female (type) collected at Opaeula, Oahu, by D. 
T. Fullaway, March 30, 1913. 
Type: Cat. No. 97, Bishop Museum. 
98. Sierola hillebrandi n.sp. 
@ dull shining black; legs luteous, antenne yellowish brown, fuscous 
outwardly. 
Head and thorax with a microscopically fine reticulate surface sculp- 
ture; finely, shallowly and closely punctate; hairy clothing inconspicuous. 
Head a little longer than wide, width between the eyes a little more than the 
length from eye to vertex; convex above and beneath, depressed in front; 
vertical margin straight, temples rounded, eyes flatly convex: antenne 
reaching the mesoscutum, segments of the flagellum with the exception of 
the third, longer than wide, antennal fosse 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 stout, curved, concavo- 
convex, truncate apically and toothed, base not quite reaching the eye; gula 
convex, medially foreshortened, as wide as long, anterior margin arcuately 
concave, posterior margin incised, median groove effaced; propodeum finely 
rugulose; abdomen ovate, apically acuminate, smooth and polished; wings 
infuscate; length 3 mms. 
Described from one female (type) collected at Hillebrand’s Glen, Oahu, 
by O. H. Swezey, November 17, 1912. 
Type: Cat. No. 98, Bishop Museum. 
99. Sierola affinis n.sp. 
2 dull shining black; legs and antennz basally luteous, the latter fus- 
cous apically and the middle and hind femora infuscate. 
Head and thorax to the propodeum with a microscopically fine reticu- 
late surface sculpture, coarser on the head; coarsely, shallowly and closely 
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