446 Records of the Indian Museum. [VoL. VII, 
5th, its lower branch, nearly attaining wing margin, though be- 
coming very faint towards its tip; 7th vein half as long as 6th, 
close to and parallel to the hind border of the wing. 
Whole surface of wing with short dark hairs. A patch of 
black hairs at tips of Ist and 3rd longitudinal veins, the intermedi- 
ate space on the costa covered with whitish hairs. Halteres pale 
lemon yellow. 
Described from 3 @ %®. The specimens were bred from 
larvae found under dead bark of a Sal tree (Shorea robusta), at 
Thano, Dehra Dun, 9-1i-12, Siwalik Forest Division, United Provin- 
ces, at about 1500 feet (mms). 
Type in Indian Museum, cotypes in the Forest Zoology collec- 
tion. 
BIBIONIDAE. 
Plecia impostor, mihi, sp. nov. 
a7 2. Western Himalayas. Long. 4—5 mm. 
This species is conspicuous by the extraordinary resemblance 
it has to Pleciomyia melanaspis, Wied. The whole insect is black 
with the exception of the hinder part of the thoracic dorsum, 
which is of the same ferruginous red colour which appears in the 
same part in melanaspis and, as in that well-known species, without 
being sharply demarcated. ‘The antennae differ from all other 
oriental species by having only nine joints; the two scapal joints 
normal, Ist flagellar joint narrowed at base,a little longer than 
the remaining five annular subequal joints, in addition to which 
there is a small apical conical joint. The 3rd longitudinal vein 
forks at or just beyond one third of the distance between the 
anterior cross vein and the tip of the 3rd vein. The 4th vein 
forks distinctly proximad of the fork of the 3rd vein rather 
broadly, but the degree of divergence of the prongs is variable. 
Wings blackish. 
Described from 3 o @ and 3 2 2, from Airadeo (6880 ft.), 
31-v-12 (type # and 2); and Bhowali, 25-vi-12, both places in the 
Kumaon District. [Jmms]. 
Type @ and @ in the Indian Museum, presented by Dr. A. 
D. Imms; cotype @ @ in the Forest Zoology collection. 
N.B.—In my paper on New Oriental Nemocera (Rec. Ind. 
Mus., iv. 259) there were some inaccuracies respecting the antennae 
in this genus. ‘These inaccuracies are corrected in my volume on 
Nemocera for the ‘‘ Fauna of British India’’ series, now in the 
press. Plecia fulvicollis, atra and indica have 12 joints to the 
antenna, P. tergorata and obscura only 10. Pleciomyia melanaspis 
has twelve. 
PARAPLECIOMYIA, mihi, gen. nov. 
Differs from Pleciomyia, Brun., by the 4th longitudinal vein 
forking some distance beyond the anterior cross vein, approxi- 
mately opposite the fork of the 3rd vein 
