HYMENOPTERA PARASITICA 291 



The head is large, longer than wide, the clypeus being produced into a broad plate 

 or ledge, rounded anteriorly and covering the mandibles. The joints of the flagellum 

 3 to 10 are moniliform and scarcely longer than thick. 



^. Length i "9 mm. Agrees very closely with the female, except that the apex 

 of the abdomen gapes open and exposes the genitalia, the produced clypeus is a little 

 narrower and subtruncate anteriorly, not rounded, while the joints of the flagellum are 

 longer, not moniliform, the joints all being distinctly longer than thick. 



Hab. Hawaii: Kilauea, in July and August. — Oahu : Waianae Mts. (2000 feet), 

 in March. 



(5) Sierola testaceipes Cameron. 



1 88 1. Sierola testaceipes Cameron, Tr. Ent. Soc. London, p. 556, ?. — 

 1898. Dalla Torre, Cat. Hym. v. p. 555. 



" ?. Length i^ lines. Black; head and mesonotum faintly alutaceous ; abdomen 

 smooth, shining ; three basal joints of antennae and legs testaceous ; abdominal 

 segments at their junction dull testaceous. Wings deeply fringed, shorter than the 

 thorax and abdomen, hyaline ; stigma and parastigma fuscous ; other nervures pale. 

 Head and thorax covered with a scattered pubescence." (Cameron.) 



Z. Length r8 mm. Black, the head and thorax feebly coriaceous ; antennae, 

 except the 5 or 6 terminal joints, and the legs, including the coxae, yellow. The 

 head is not longer than wide, a little the widest across the eyes. The antennae are 

 more than twice the length of the head, with joints 7 to 12 moniliform. Abdomen 

 oblong oval, hardly as long as the thorax or no longer. 



Hab. Sandwich Islands (Rev. Thomas Blackburn) ; Hawaii : Kilauea, in July 

 and August; Kona (2000 — 3000 feet), in September; Olaa, in September. — Kauai: 

 Halemanu (4000 feet), in April ; Koholuamano, in March, high plateau in August and 

 October; Mts. Waimea (4000 feet), in June. — Lanai : Halepaakai, in July (2000 — 

 3000 feet), in January and February. — Maui : Lahaina (2000 feet), in January. — 

 Molokai in June. — Oahu: Kaala Mts. (3000 feet), in December; Mts. near Honolulu 

 (2000 — 3000 feet) ; Waianae Mts. (2000 — 3000 feet), in February and April. 



(6) Sierola flavocollaris, sp. nov. 



?. Length about 3 mm. Head, thorax, except the pronotum, and the abdomen 

 black ; pronotum, base of antennae and the legs, including coxae, flavo-testaceous ; 

 terminal joints of antennae fuscous ; wings hyaline or only faintly tinged, the parastigma 

 and the stigma brown, the veins pallid or pale yellowish. Head and thorax finely 

 coriaceous, the head anteriorly subopaque. Abdomen hardly as long as the head and 



