New Species of Sierola, With Explanatory Notes. 85 
with a triangular area at the base smooth and shining; abdomen elongate 
ovate, smooth and polished; wings subinfuscate, with a faint yellowish 
brown pigmentation; length 3 mms. 
4 with the head and abdomen shorter, the latter bluntly pointed api- 
cally, wings deeply pigmented. 
Described from four females and five males (type, allotype and para- 
types). Type and allotype collected on Tantalus mountain, Oahu, 1500 ft. 
elev., by W. M. Giffard, December 22, 1918; 2 6 6 and1@ collected on Ma- 
noa Ridge, Oahu, by D. T. Fullaway, February 13, 1917; 1 @ collected on 
Waialae Ridge, Oahu, by O. H. Swezey, April 22, 1917; 1 2 collected on 
Manoa Cliffs, Oahu, by P. H. Timberlake, September 1, 1918; 1 ¢ collected 
on Tantalus mountain, Oahu, 1500 ft. elev., by W. M. Giffard, August 27, 
1918; 1 ¢ collected on Manoa Cliffs, Oahu, by P. H. Timberlake, March 29, 
1918, paratypes. 
Type: Cat. No. 26, Bishop Museum. 
27. Sierola brevicornis n.sp. 
? moderately flat, slender, and shining, almost brilliant, black: legs and 
antennz basally luteo-testaceous, the latter fuscous outwardly, mandibles red- 
dish brown except at the base. 
Head and thorax to the propodeum with a microscopically fine reticu- 
late surface sculpture, coarsely, shallowly and remotely punctate and hairy. 
Head a little longer than wide, width between the eyes more than the length 
from eye to vertex; flat above, depressed a little in front, and a little tumid 
beneath, the greatest depth behind the eye; vertical margin straight, temples 
rounded, eyes convex, antenne a little longer than the head, all the segments 
of the flagellum as wide as long with the exception of the pedicel, which is 
a little longer, antennal fosse deep; clypeus short, medially longitudinally 
elevate, sloping at the sides, depressed apically and slightly projected in 
front of the anterior margin of the head; mandibles slender, curved, con- 
cavo-convex, truncate apically and toothed, base not reaching the eye; cheeks 
very narrow; gula and sides of the head flat, the former medially fore- 
shortened, wider than long, anterior margin arcuately curved, posterior mar- 
gin incised; propodeum hardly rugulose, a little more coarsely sculptured 
than the head and thorax in front; abdomen elongate ovate, smooth and 
polished; wings subinfuscate; length 2.75 mms. 
Described from one female (type) collected at Kaumuohona, Oahu, by 
P. H. Timberlake, June 4, 1916. 
Type: Cat. No. 27, Bishop Museum. 
28. Sierola montana n.sp. 
@ brilliant black, legs and antenne basally luteo-testaceous, the latter 
fuscous outwardly; mandibles testaceous. 
Head and thorax with a microscopically fine and delicate reticulate 
surface sculpture; finely, shallowly and somewhat remotely punctate, hairy 
clothing short and inconspicuous. Head as wide as long, widest across the 
eyes, which are slightly bulging, short behind the eyes, width between the 
eyes twice the length from eye to vertex; convex above, depressed in front, 
[ese 
