72 New Species of Sierola, With Explanatory Notes. 
DESCRIPTIONS OF NEW HAWAIIAN SPECIES. 
1. Sierola distincta n.sp. 
Plate XVI, Figure 1. 
9 brilliant black, with the exception of the propodeum, which is dull; 
legs and antenne yellowish brown, the latter fuscous outwardly. 
Head and thorax to the propodeum with a microscopically fine reticu- 
late surface sculpture and a few scattered setiferous punctures. Head con- 
siderably longer than wide, widest across the eyes, width between the eyes 
scarcely more than the length from the eye to the vertex; flatly convex 
above, depressed in front, flat beneath, the greatest depth considerably behind 
the eyes, the gula considerably longer than the occiput; vertical margin 
slightly concave, temples rounded, eyes convex, antenne long, reaching the 
scutellum, all the segments more than twice as long as wide, antennal fossz 
deep; clypeal process a spatulate decurved beak, convex above; mandibles 
large, bent near the middle, the distal portion stout, concavo-convex, 
obliquely truncate apically and toothed, base not nearly reaching the eye, 
cheeks moderately long; gula and sides of the head flat, the former as wide 
as long, with distinct median furrow, anterior margin arcuately concave, pos- 
terior margin incised; propodeum rugose, with an acute triangular area at 
its base smooth: abdomen elongate ovate, smooth; wings subinfuscate, nearly 
hyaline; length 3 mms. 
6 with yellowish brown mandibles; smaller than the 9, head shorter, 
antenne more slender, cheeks shorter, abdomen blunt at apex. 
Described from twenty females and eleven males (type, allotype and 
paratypes). ‘Type, allotype, and one @ paratype Opaeula, Oahu, collected by 
O. H. Swezey, March 30, 1913. Paratypes: 1 2 Hauula, Swezey, August 15, 
1914; I 92 Tantalus (1300 ft.), Giffard October 15, 1905; 5 @ Tantalus 
(1500 ft.), Giffard, August 27 and December 22, 1918; 1 2 Tantalus, Fulla- 
way March 20, 1900; 1 @ Tantalus (2000 ft.), Kotinsky: 1 9 Nunanu, Ful- 
laway September 4, 1916; 1 2 Kuliouou, Timberlake June 25, 1916; 1 @ 
Manoa Cliffs on Campylotheca, Timberlake September 1, 1918; 1 9 Palolo 
Crater, Timberlake September 8, 1918; 19S. E. Koolau Mts., Bridwell 
June, 1918; Oanu: 2 2 Kilauea (4000 ft.), Giffard October 15 and January 
19, 1916, I @ Kilauea (4000 ft.), Giffard and Muir, January 13, 1917; 1 2 
29 miles Olaa, Fullaway, November 19, 1913; Hawai: 1 ¢ Tantalus (1500 
ft.), Giffard December 22, 1915; 2 6 Nuuanu, Fullaway, August 20, 1916, and 
April I, 1917; 1 6 Manoa, Fullaway, July 29, 1917; 2 6 Olympus Mt., Tim- 
berlake September 8, 1918; 3 ¢ Palolo Crater on Straussia kaduana, Tim- 
berlake September 29, 1918; 1 ¢ Palolo Crater on Pelea clusiaefolia, Tim- 
berlake September 28, 1918; Oanu. 
A variable species. Some of the Hawaii specimens are not quite typical. 
Type: Cat. No. 1, Bishop Museum. 
2. Sierola armata n.sp. 
2 shining black but not brilliant, antennz and legs yellowish brown to 
fuscous. 
Head and thorax to the propodeum with a microscopically fine, reticu- 
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