292 FAUNA HAWAIIENSIS 



thorax united, polished, impunctate. The head is large, very distinctly longer than 

 wide, with a median carina between the insertion of the antennae, while the antennae 

 are a little longer than the head, all the flagellar joints being a little longer than thick, 

 the joints 8 to i 2 oval, submoniliform. 



Described from 5 specimens. The species is allied to S. collaris, but it is larger, 

 with a larger and quite differently shaped head. 



Hab. Kauai : (high plateau), in August ; Makaweli (2000 feet), in January. 

 — Maui : Haleakala (4000 feet). 



(7) Sierola collaris, sp. nov. 



%. Length 2 to 2 '2 mm. Black, with the mandibles, the five or six basal joints 

 of the antennae, the prothorax, except sometimes a dusky spot on the prosternum 

 anteriorly, the mesonotum and usually (but not always) the scutellum, yellow ; the 

 palpi, the tegulae, and the legs, yellowish-white ; mesopleura sometimes with a pale 

 spot anteriorly beneath the tegulae; wings hyaline, the stigma and parastigma brown, 

 the internal veins pallid. The head and thorax are feebly, microscopically sculptured, 

 clothed with a sparse, short, whitish pubescence. The head is scarcely longer than 

 wide across the eyes, the clypeus anteriorly obtusely triangular, with a delicate median 

 carina. Antennae normal, the 7 or 8 terminal joints obfuscated or pale brownish, 

 joints 5 to 12 submoniliform, scarcely longer than thick, the last ovate, a little longer 

 than the preceding. Metathorax finely rugulose. Abdomen pointed ovate, about the 

 length of the thorax, highly polished and impunctate. 



Hab. Kauai : (high plateau), in August ; Halemanu (4000 feet), in May ; Koho- 

 luamano, in June. 



(8) Sierola kauaiensis, sp. nov. 



$. Length 2 to 2-5 mm. Honey-yellow; stemmaticum, eyes and metathorax 

 black ; legs yellowish-white. The head is large, a little longer than the width across 

 the eyes ; the antennal joints 7 to 12 are moniliform, not longer than thick; the wings 

 hyaline, the veins pallid, the stigma and parastigma tinged with brown ; while the 

 abdomen is ovate, highly shining, and a little shorter than the thorax. 



Described from 3 specimens. 



Hab. Kauai : Kaholuamano, in April. 



