78 New Species of Sierola, With Explanatory Notes. 
Described from one female (type), collected on Tantalus Mt., Oahu, 
1500 ft. elevation, by W. M. Giffard, August 27, 1918. 
Type: Cat. No. 12, Bishop Museum. 
13. Szerola bella n.sp. 
@ slender, shining black, antenne basally, pronotum and prosternum, ex- 
cept at the sides, and the legs yellowish brown, mandibles reddish apically. 
Head and thorax with a microscopically fine surface sculpture, fairly 
closely, finely and shallowly punctate and hairy. Head as wide as long, width 
between the eyes considerably more than the length from eye to vertex, con- 
vex above, tumid beneath: vertical margin deeply concave, temples rounded, 
eyes convex; antennz a little longer than the head, segments of the flagellum 
scarcely longer than wide, pedicel a little longer, antennal fosse deep; clypeal 
process short and somewhat spicate; mandibles short, not very stout, curved, 
truncate and toothed apically, base not reaching the eye; cheeks moderately 
wide; gula flat, wider than long, divided into two lobes posteriorly by a 
short sulcus, median furrow nearly effaced, anterior margin arcuately con- 
cave, posterior margin deeply incised, sides of the head slightly convex; 
propodeum finely aciculate; abdomen elongate, smooth and polished; wings 
hyaline; length 3 mms. 
Described from one female (type), collected in Palolo Crater, Oahu, 
by P. H. Timberlake, September 8, 1918. 
Type: Cat. No. 13, Bishop Museum. 
14. Sierola gracilis u.sp. 
@ slender, shining black, antennz basally and the legs yellowish brown, 
antennz apically and the femora outwardly infuscate, mandibles reddish brown 
medially and at the tips. 
Head and thorax with a fine, reticulate surface sculpture, fairly closely, 
finely and shallowly punctate and hairy. Head considerably longer than 
wide, width between the eyes not much greater than the distance from the 
eye to the vertex ; convex above and somewhat tumid beneath, deepest directly 
behind the eye; vertical margin very slightly concave, temples rounded, eyes 
flatly convex; antennz reaching the mesoscutum, all the segments longer 
than wide, antennal fossze deep; clypeus bluntly pointed, flat on top, apically 
depressed, extended a little beyond the anterior margin of the head; man- 
dibles abruptly bent at the middle, rather slender basally, flattened and much 
wider distally, the apical margin obliquely truncate and toothed, base not 
quite reaching the eye: cheeks narrow; gula and sides of the head flat, the 
former medially foreshortened, as wide as long, median furrow very fine, 
anterior margin arcuately concave, posterior margin incised; abdomen 
elongate, smooth and polished; wings subinfuscate, with a faint yellowish 
brown pigmentation; length 2.5 mms. 
Described from one female (type) collected on Kaumuohona Ridge. 
Oahu, by P. H. Timberlake, January 7, 1917. 
Type: Cat. No. 14, Bishop Museum. 
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