Mr. J. O. Westwood’s Description, &c. 
151 
XXVIII. Description of a new Genus of Dipterous Insects 
from New South Wales. By J. O. Westwood, F. L. S. 
[Read February 1, 1836.] 
Triciiopsidea, Westw. 
Genus novum e familia Anthracidarum , N emestrinas cum Colace 
Wiedemanni conjungens. 
Corpus parvum, hirsutum. 
Caput transversum, oculis magnis lateralibus in uno sexu in 
verticem conjunctis, spatio parvo elevato, pro ocellis, postice 
relicto ; fronte triangulari, valde piloso, pilis proboscidem 
omnino tegentibus. Ocelli 3 parvi in triangulum dispositi. 
Antennce minutse distantes, faciei medio ad marginem inter- 
num oculorum insertae ; 3-articulatae ; articulo lmo brevi, 
cylindrico ; 2do parvo, globoso ; 3tio pyriformi in setam 
versus apicem paullo crassiorem producto. 
Os rudimentale, labro elongato-conico, corneo ; labio paullo 
longiori, apice ovato, concavo ; palpis ? e filamentis duobus 
elongatis membranaceis, constantibus. 
Thorax subcpiadratus, valde pilosus ; scutello transverso, in- 
ermi. 
Abdomen ovatum, convexum. 
Pedes graciles, tarsorum articulo lmo longiori ; 2do, 3tio, et 
4to minutis, pulvillis tribus. 
Aloe corporis toti longitudine, patentes, nervis fere ut in Ne- 
mestrina fasciala clispositis ; nervo 3tio apicali simplici, 4to 
intus furcato. 
This is a curious genus, having in several respects a consider- 
able external resemblance to the CEstridce, a circumstance more 
especially observable in the covering of hair with which the face 
is entirely covered, concealing the rudimental mouth, which is 
furnished laterally with two long membranous fillets like strips 
of parchment, which I presume are analogous to palpi. There is 
also a horny upper lip, and a dark coloured body, which I pre- 
sume is the analogue of the terminal lobes of the proboscis. 
It is distinct from all the sub-genera of Nemestrina lately pro- 
posed by me in the London and Edinburgh Philosophical Magazine, 
in which the elongated proboscis is distinct. The neuration of the 
wings is also more simple. 
VOL. II. 
N 
