122 New Species of Sierola, With Explanatory Notes. 
punctate, and hairy. Head wider than the thorax, 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 a little longer 
than the head, pedicel twice as long as wide, first, second and third funicle 
segments longer than wide, following segments as wide as or wider than 
long, antennal fossee deep; clypeus short and flat, longitudinally carinate 
down the middle, apically depressed and projecting very slightly in front 
of the anterior margin of the head, sloping a little 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 
almost touching the eye above; gula convex, medially foreshortened, as wide 
as long, anterior margin arcuately concave, posterior margin incised; propo- 
deum finely rugulose; abdomen elongate ovate, smooth and polished; wings 
subinfuscate; length 2.5 mms. 
Described from one female (type) collected at Kuliouou, Oahu, by P. 
H. Timberlake, December 12, 1918. 
Type: Cat. No. 99, Bishop Museum. 
100. Sierola opogonae n.sp. 
? dull black, opaque; legs and antennz luteous, the latter fuscous api- 
cally, the former basally. 
Head and thorax to the propodeum with a microscopically fine and 
close reticulate surface sculpture, a little coarser on the head; finely, closely 
and shallowly punctate; hairy clothing long, delicate and ample. Head a 
little longer than wide, widest across the eyes, narrowing behind and in front, 
width between the eyes somewhat more than the length from eye to vertex; 
convex above, depressed in front, a little tumid beneath; vertical margin 
straight, temples rounded, eyes convex; antenne a little longer than the 
head, pedicel less than twice as long as wide, the following segments as 
long as or a little longer than wide, antennal fosse deep; clypeus carinate, 
apically depressed and projecting slightly in front of the anterior margin of 
the head, which is angulate, not transverse, declivous at the sides, the carina 
extending backward on the top of the head beyond the base of the antenne ; 
mandibles slender, curved, concayo-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 deeply 
incised, median groove nearly effaced; propodeum finely rugulose, flat dor- 
sally; abdomen short ovate, smooth and polished; wings hyaline; length 
2.25 mms. 
6 smaller, head a little shorter, mandibles luteous, abdomen bluntly 
pointed at the apex. 
Described from two females and one male (type, allotype and para- 
type) from Tantalus mountain, Oahu, reared by J. C. Bridwell from Opo- 
gona larva on Clermoutia. The parasitized larva was collected May 26, 1918, 
cocoons were formed by May 27, adults appeared June 5. 
Type: Cat. No. 100, Bishop Museum. 
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