1917] Girault—New Species of Closterocerus 101 
A NEW SPECIES OF CLOSTEROCERUS FROM CALI- 
FORNIA (HYMENOPTERA EULOPHID). 
By A. A. GIRAULT, 
Bureau of Entomology, Washington, D. C. 
This new species is characterized by bearing narrow fore wings 
with rather long apical fringes and a T on the fore wing formed 
by a long longitudinal stripe from proximad and the first cross- 
stripe; the letter is on its side, to the right from the upright. 
Closterocerus tau sp. nov. 
Female: Length, 0.85 mm. Black metallic blue, the scutum 
and scutellum lighter blue except marginally, the tarsi white except 
the distal joint; pronotum conical, light blue discally. Body 
densely scaly, the propodeum with a median carina only, sub- 
glabrous. Venation sooty, the very long marginal vein silvery 
white. Fore wing broadening distad, about thrice longer than 
wide at its truncate apex, its apical marginal cilia somewhat less 
than half the greatest width, the discal ciliation absent except on 
the infuscations; the thick longitudinal stripe originates at caudal 
margin opposite the base of the marginal vein and runs straight into 
the middle of the first cross-stripe which is across from the apex of 
the marginal and all of the post marginal veins (with the stigmal 
in its middle); first cross-stripe somewhat narrower than the second 
which is at apex, the hyaline space between them equal to the 
second cross-stripe. Stigmal and postmarginal veins subequal, 
not very short, the first at right angles to the marginal. Funicle 
joints equal, twice wider than long; pedicel very large, longer than 
the funicle. Mandibles tridentate. Otherwise usual. Wings 
with two cross-stripes. 
From one female on a tag in the U. S. National Museum from 
Inyo County, California. 
Type: Catalogue No. 20290 U. S. National Museum, the 
specimen above, the head and a fore wing on a slide. 
