120 New Species of Sierola, With Explanatory Notes. 
from the larva of a species of Batrachedra infesting a fern (Acrostichum 
sp.). 
Type: Cat. No. 106, Bishop Museum. 
107. Sierola similarts n.sp. 
9 shining black, a little dull on the head; prothorax, legs, antenne and 
mandibles yellowish brown. 
Head and thorax with a microscopically fine reticulate surface sculp- 
ture, a little coarser on the head; finely, shallowly, fairly closely punctate, 
and hairy. Head as wide as long, widest across the eyes, narrowing behind 
and in front, width between the eyes considerably more than the length from 
eye to vertex, length in front of the eyes not great; flat above, depressed in 
front, tumid beneath, the greatest depth beneath the posterior end of the 
eye; vertical margin straight, temples rounded, eyes convex; antennz reach- 
ing the mesoscutum, all the segments longer than wide, pedicel more than 
twice as long as wide, antennal fosse deep; clypeus short, 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 slender, curved, truncate apically and toothed, base 
touching the eye above; gula convex, not much foreshortened, anterior and 
posterior margins arcuately concave; abdomen ovate, smooth and polished; 
wings subinfuscate; length 2.25 mms. 
Described from one female (type) collected at Waimano, Oahu, by O. 
fi. Swezey, January 5, 1913. 
x 
Type: Cat. No. 107, Bishop Museum. 
108. Sierola fossulata n.sp. 
2? shining black; mandibles, coxe, femora, and flagellum of the anten- 
nz fuscous, trochanters, tibia, tarsi and scape of the antenne yellowish 
brown. 
Head and thorax to the propodeum with a microscopically fine reticu- 
late surface sculpture: coarsely, shallowly and fairly closely punctate; clothed 
with short, fairly stiff white hairs. Head wider than the thorax, as wide as 
long, widest across the eyes, narrowing behind and in front, width between 
the eyes nearly twice the length from eye to vertex; convex above, tumid 
beneath, the depth beneath the eye equal to the length behind the eye; ver- 
tical margin slightly convex, temples rounded, eyes convex; antennz reach- 
ing the mesoscutum, all the segments longer than wide, the pedicel twice as 
long as wide, antennal fosse deep; clypeus more or less convex, indistinctly 
carinate, apically depressed and projecting slightly in front of the anterior 
margin of the head, which is angulate, not transverse, sloping at the sides, 
the carina extending backward shortly on the top of the head; mandibles 
slender, bent and twisted at the middle, the distal portion flattened, trun- 
cate apically and toothed, base not reaching the eye; gula and sides of the 
head flat, the former medially foreshortened, wider than long, median line 
with a deep sulcus posteriorly, anterior margin arcuately concave, posterior 
margin incised, the lower lobe of the base of the mandibles deeply notching 
the anterior margin at the side; propodeum rugose and dull; abdomen ovate, 
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