So New Species of Sierola, With Explanatory Notes. 
Head and thorax to the propodeum with a microscopically fine reticu- 
late surface sculpture, extremely finely, shallowly and fairly closely punctate, 
hairy clothing short and inconspicuous. Head nearly as wide as long, widest 
at the vertex, narrowing slightly in front, width between the eyes a little 
more than the length from the eye to the vertex; convex above, depressed in 
front, tumid beneath, the greatest depth behind the eyes; vertical margin 
concave, temples rounded, eyes convex; antenne reaching the mesoscutum, 
all the segments of the flagellum a little longer than wide, the pedicel hardly 
twice as long as wide, antennal fosse deep; clypeal process a small, de- 
curved, spatulate beak, flat above and extending more than half its length in 
front of the anterior margin of the head; mandibles net very stout; bent 
at the middle, the distal portion flattened, truncate and toothed apically, base 
not reaching the eye; cheeks fairly wide; gula and sides of the head flat, 
the former medially foreshortened, as wide as long, anterior margin arcuately 
concave, posterior margin incised; propodeum finely rugulose; abdomen 
elongate, smooth and polished; wings subinfuscate, with a more or less faint 
yellowish brown pigmentation; length 2.5 to 3 mms. 
Described from two females (type and paratype) collected on Kona- 
huanui, Oahu, by O. H. Swezey, February 22, 1914. 
Type: Cat. No. 17, Bishop Museum. 
18. Sierola suttoniae u.sp. 
@ black, hardly shining in front of the abdomen, head opaque, antennez 
and legs brown. 
Head and thorax to the propodeum with a microscopically fine surface 
sculpture, much coarser on the head, fairly coarsely, shallowly and remotely 
punctate, hairy clothing short and inconspicuous. Head a little longer than 
wide, width between the eyes a little more than the length from eye to ver- 
tex; flatly convex above, tumid beneath, the greatest depth beneath the pos- 
terior end of the eyes; vertical margin straight, temples rounded; eyes con- 
vex; antenne reaching the mesoscutum, all the segments of the flagellum 
longer than wide, pedicel and funicle twice as long as wide, antennal fosse 
deep; clypeus small, decurved, hardly exceeding the anterior margin of the 
head, contracted at the base by the inward extension of the antennal fosse; 
mandibles stout, curved, concavo-convex, truncate and toothed apically, base 
nearly but not quite touching the eye above; cheeks narrow; gula and sides 
of the head convex, the former medially foreshortened, wider than long, 
anterior margin arcuately concave, posterior margin incised; propodeum rugu- 
lose; abdomen elongate ovate, smooth and polished; wings with a deep 
brown pigmentation; length 3 mms. 
Described from one female (type), collected on Suttonia lassertiana on 
Mt. Kaala, Oahu, 2500 ft. elev., by P. H. Timberlake, March 4, 1917. 
Type: Cat. No. 18, Bishop Museum. 
19. Sterola muri n.sp. 
@ shining black, antenne and legs brown. 
Head and thorax to the propodeum with a microscopically fine reticulate 
surface sculpture, a little coarser on the head and pronotum; finely and 
[ 26 | 
