Q2 New Species of Sierola, With Explanatory Notes. 
foreshortened, transverse, anterior margin arcuately concave, posterior mar- 
gin incised; abdomen elongate ovate, smooth and polished; wings with a 
slightly fuscous pigmentation; length 4 mms. 
Described from one female (type) collected on the Shipman Ranch, at 
Kilauea, Hawaii, by F. Muir, January 14, 1917. 
Type: Cat. No. 39, Bishop Museum. 
40. Sierola longicaudata n.sp. 
@ unusually large and thick-set; black, the head and thorax dull, the 
former nearly opaque, legs and antenne brown to fuscous. 
Head and thorax with a microscopically fine and close reticulate sur- 
face sculpture, finely, shallowly and-rather closely punctate and hairy. Head 
a little longer than wide, widest across the posterior part of the eyes, nar- 
rowing behind and in front, smallest width, between the eyes, twice the 
length from eye to vertex; convex above and beneath; vertical margin 
stratght, temples rounded, eyes convex; antenne reaching the mesoscutum, 
all the segments longer than wide, antennal fosse deep; clypeus carinate 
and vertically depressed, projecting a little in front of the anterior margin 
of the head, declivous at the sides; mandibles fairly stout, curved, concavo- 
convex, truncate and toothed apically, base not quite reaching the eye: 
cheeks narrow; gula and sides of the head flat, the former medially fore- 
shortened, wider than long, anterior and posterior margins arcuately con- 
cave, median groove nearly effaced; abdomen elongate ovate, apically acu- 
minate; wings hyaline or nearly so; length 3.75 mms. 
Described from three females (type and paratypes) collected on Maui 
by Koebele. 
Type: Cat. No. 40, Bishop Museum. 
41. Sierola laticeps n.sp. 
2 unusually large; dull shining black, antenne and legs brown, the 
fore-coxze and femora outwardly fuscous. 
Head and thorax to the propodeum with a microscopically fine and 
close reticulate surface sculpture, closely and shallowly punctate and thinly 
clothed with silvery gray hairs. Head wider than the thorax, a little longer 
than wide, widest across the eyes, narrowing behind and in front, width 
between the eyes considerably more than the length from eye to vertex; 
convex above, depressed in front, abnormally swollen beneath, the greatest 
depth, beneath the posterior end of the eye, at least two-thirds the length; 
vertical margin straight, temples rounded, eyes convex; antenne longer 
than the head, all the segments considerably longer than wide, antennal fos- 
se 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, the carina extending backward on the top of the head beyond the 
base of the antennz; mandibles short, stout, concavo-convex, truncate and 
toothed apically, base not reaching the eye; cheeks narrow; gula and sides 
of the head flatly concave, the former medially foreshortened, about as long 
as wide, narrowing behind where it is strongly protuberant and divided into 
two lobes by a rather deep median sulcus; propodeum finely rugulose: 
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