124 New Species of Sierola, With Explanatory Notes. 
103. Sierola sericea n.sp. 
9 dull black, opaque; legs and antennz basally brown, the front cox 
and the antennze outwardly fuscous; mandibles reddish apically. 
Head and thorax to the propodeum with a microscopically fine and 
close reticulate surface sculpture, a little coarser on the head; very finely, 
shallowly and closely punctate; hairy clothing long, delicate and rather 
thick, that on the antennze sericeous. Head longer than wide by a half, 
width between the eyes a little more than the length from eye to vertex; 
flatly convex above, depressed in front, a little tumid beneath, the greatest 
depth beneath the eye; vertical margin straight, temples rounded, eyes flatly 
convex: antenne reaching the mesoscutum, all the segments longer than 
wide, pedicel twice as long as 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 shortly on the top of the head; mandibles slender, 
curved, truncate apically and toothed, base touching the eye above, lower 
angle protuberant; gula and sides of the head flat, the former longer than 
wide, narrowing behind, anterior margin arcuately concave, posterior margin 
deeply incised; propodeum finely rugulose; abdomen elliptical, smooth and 
polished; wings subinfuscate, with a yellowish brown pigmentation; length 
2.75 mms. 
Described from one female (type) collected at Olinda, Maui, 4200 ft. 
elevation, by Giffard and Fullaway, May 13, 1018. 
Type: Cat. No. 103, Bishop Museum. 
104. Sierola robusta n.sp. 
@ dull black, opaque; legs and antenne yellowish brown, the femora 
infuscate; mandibles reddish apically. 
Head and thorax to the propodeum with a microscopically fine and 
close reticulate surface sculpture, a little coarser on the head; finely, shal- 
lowly and closely punctate; hairy clothing long, delicate and ample. Head 
longer than wide by the length in front of the eyes, 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, tumid 
beneath, the greatest depth beneath the eye; vertical margin slightly con- 
cave, temples rounded, eyes flatly convex; antenne broken, basal segments 
all 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 back- 
ward shortly on the top of the head; mandibles slender, curved, concavo- 
convex, truncate apically and toothed, base not reaching the eye; gula 
anteriorly and sides of the head flat, the former medially foreshortened, 
longer than wide, narrowing posteriorly, where it is more convex, anterior 
margin almost straight, posterior margin incised, median groove effaced; 
propodeum finely rugulose; abdomen ovate, apically acuminate, smooth and 
polished; wings subinfuscate: length 3 mms. 
Described from one female (type) collected at Opaeula, Oahu, by O. H. 
Swezey, March 30, 1913. 
Type: Cat. No. 104, Bishop Museum. 
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