1912. | E. Brunetrt1: New Oniental Diptera. 479 
men minutely pubescent; Ist and 2nd segments with grey hair 
at sides. Genitalia small, partly withdrawn, dark shining brown; 
ultimate portion with a row of light brown scale-like spines on 
each side. 
Legs.—Simple, no traces of bristles or longer hairs, except two 
apical bristles at the tips of the anterior tibiae (the hind tibiae 
and tarsi are missing); dark brown with minute grey pubescence, 
which is longer on the coxae, and short and thick on the tibiae; 
tarsal joints with black tips. 
Wings.—Uniformly pale yellow, veins darker yellow, costa 
black, border of wing without a single hair; 3rd longitudinal 
vein with a minute appendix at base of upper fork. Abulae con- 
colorous, bare; tegulae very small, bright yellow with a very 
narrow fringe. Halteres blackish, stem brown. 
Described from a single ~ in the Indian Museum from Sadiya, 
Assam. 
N.B.—Bigot marked this specimen as a 2 but, though the 
genital apparatus is much concealed, it looks to me more like that 
ofa o. 
THEREVIDAE. 
Phycus brunneus, W. (Xylophagus, id.) 
(X. canescens, Walk.) 
After a careful examination of a considerable number of 
specimens in the Indian Museum collection I can have no hesitation 
in pronouncing these two species as identical. Examples are present 
answering exactly to the descriptions of both authors, but certain 
characters are sufficiently variable to easily embrace both forms. 
The whitish dorsal stripe on the thorax is marked by a very 
narrow still whiter median line (which is not always very distinct), 
and when this is distinct it fulfils Walker’s description of ‘‘ two 
hoary stripes side by side.’’ The scutellum is nearly always red- 
dish on the posterior margin to an obvious extent, but is some- 
times practically all black. The colour of the abdominal bands 
varies from quite white to distinct yellow. ‘The coxae and femora 
are always wholly yellow, sometimes lighter in colour, varying to 
deep chrome; and the middle tibiae are invariably much lighter 
than the others, sometimes as pale as the femora, and the fore and 
hind tibiae vary from brownish yellow to nearly black. The 
pubescence of the body is whiter and more conspicuous in the form 
Walker describes. The wing is often absolutely clear, but gene- 
rally with either a pale brownish tinge towards the tips or with 
(more often in the ~) the veins homerde the tip distinctly brown 
suffused. All these characters vary irrespective of one another, 
which is convincing that the specimens all represent but a single 
species. 
Localities.—Calcutta, 27-ii- 07—I2-11i-07 [Annandale]; Bho- 
gaon, Ig-1ll-og, 18-x-07; Katihar. 26-i1i-09 (both Purnea District, 
N. Bengal, both Paiva); Dhikala, Naini Tal District, 22-iv-08. 
