427 



pressed; prepectal plates and sides of the scrobal impression of the face 

 more evidently and somewhat more coarsely reticulate; mesoscutmn 

 and base of the scutellum more faintly and minutely reticulate; facial 

 ridge and most of the scutellum almost perfectly smooth and highly 

 polished; frontovertex smoothish and with a few scattered minute pin- 

 punctures ; abdomen smooth and shiny, apparently without reticulations ; 

 the reticulations of all parts of the body are so faint that the general 

 effect is of a smooth and polished surface except possibly on the sides 

 of the scrobal impression and on the prepectal plates. Pubescence 

 consisting of fine, brownish colored hairs of moderate length, rather 

 sparse on the cheeks and frontovertex and moderately abundant on 

 the mesoscutum ; scutellum with only about a dozen such hairs 

 on the basal half and two longer, more bristle-like hairs at apex; 

 abdomen sparsely pubescent along the lateral and apical margins; pile 

 of the eyes rather sparse and short ; antennae with the usual vestiture 

 of bristle-like hairs, most abundant on the pedicel and funicle, the 

 club with considerably shorter, more erect hairs, which are abundant 

 even to the apex. 



Length: (0.74 to) 0.75; width of vertex at posterior ocelli: 0.143; 

 width of mesoscutum : 0.398 ; length of fore-wing : 0.938 : widtli of 

 fore-wing: 0.431 mm. 



General coloration metallic bluish black, the cheeks with a green- 

 ish luster, the frontovertex with a comparatively dull, bluish luster; 

 mesoscutum with a strong blue and scutellum with a refulgent bluish 

 green luster; pleura nearly pure black; luster of abdomen slightly green- 

 ish and partly iridescent especially on the basal tergite. Scape yellow 

 ocher (R.), the flagellum yellowish brown, the upper side of pedicel 

 and the club darker brown (the rest of the pedicel and the funicle 

 when mounted in balsam appearing nearly as yellowish as the scape). 

 Front legs nearly fuscous, yellowish only at the knees and apex of the 

 tibia, the tarsi brown; middle and hind legs mostly yellow ocher (R.). 

 but somewhat brownish along the upper margin of the femora and near 

 the base of the tibiae on the upper side, the last joint of the tarsi 

 brown. Wings hyaline, faintly tinged with brownish around the stigmal 

 vein and along the posterior margin at the base ; the veins brownish 

 yellow'. 



Male : Not known. 



Described from one female (type) collected on or near the 

 rim of Palolo Crater, Oaliu, Dec. 20, 1918 (J. C. Bridwell) 

 and one female (paratope) collected at the head of Waianae 

 Valley, Oahn, abont 2400 ft. elevation, Jmie 1, 1919 (Tim- 

 ])orlake). 



Thi.s species may possibly be endemic, bnt we can have no 

 positive evidence on this point nntil the species is reared. 



