Chalcidoid Flies from Coimbatore. 133 
Tetrastichus coumbatorensis, sp. n. 
In Girault’s generic key runs to Trichaporoidella, and, 
while it agrees in general with the descriptions of the 
species assigned to this genus, differs from all of them by 
various colour-markings. 
Female.—Length 1:30 mm. Head shrunken, without 
distinct sculpture; antenna as in figure 9; mesoscutum 
Tetrastichus coimbatorensis, Rohwer. Antenna of paratype 6. 
shining, without a median longitudinal sulcus, under high 
magnification faintly aciculate ; median longitudinal grooves 
of scutellum slightly converging posteriorly ; propodeum 
short, shining, without distinct sculpture, the median 
carina feeble ; abdomen subequal in length with head and 
thorax, acuminate beyond middle. Black with a bluish 
reflection ; antenna dark brown, scape yellowish beneath ; 
front of head below top of eyes, lower part of posterior 
orbits, lateral margins of pronotum, sides of scutum 
narrowly (broadening into a transverse spot posteriorly), 
posterior part of scutellum, metanotum, sides of pronotum 
posterior margin of tegula, and dorsal margin of mesepi- 
meron lemon-yellow; legs yellowish white, with the tarsi 
dusky ; wings hyaline ; venation pale brown. 
Paratypes show considerable variation in the extent of 
the yellow markings. In two specimens the abdominal 
sternites are yellow, but the markings of the thorax are 
practically the same as the type. In paratype a, however, 
the yellow of the thorax is much reduced, the pronotum 
(dorsally), the scutellum, and metanotum are black, and the 
spot on the posterior part of the scutum is reduced toa 
narrow line. 
Type-locality —Coimbatore, South India. 
Type.—Cat. No. 20,987, U.S.N.M. 
