99 A Monograph of Culicidae. 
base, mottled black and yellow before the fork, the fork black at 
the base and at the tip of each branch and with a few black 
scales dotted over the remaining yellow areas ; the fifth mostly 
yellow, a distinct black patch near the base, with scattered black 
scales on the upper branch, lower branch all yellow except a 
lack spot at the tip ; sixth vein with the apical half black, the 
basal half yellow ; fringe black, unspotted, apex yellow, border- 
scales yellow ; first sub-marginal cell longer and narrower than 
the second posterior cell, their bases nearly level, base of the first 
sub-marginal some little distance from the second costal spot. 
Halteres with pale stem, and fuscous knob with small pale scales. 
Length.—4°5 mm. 
Habitat.—Lahore, Punjaub (Dr. Christophers). 
Observaticns.—Described from a single 9. It is a very 
distinct gnat, but presents no structural difference from any 
others of the sinensis group. It can at once be told by the 
white costal spots, strongly contrasted against the yellow and 
black scaled wings. The first sub-marginal cell being all black 
is also characteristic. 

Genus 8. NYSSORHYNCHUS. Blanchard. 
LAVERANIA. Theobald. 
(Comp. Rend. Soe. Biologie, No. 23, p. 795, 1602; Jour. Trop. Med. 1902.) 
(Plate V.) 
Thorax with narrow-curved and_ spindle-shaped scales. 
Abdomen with ventral scales and also scales on the apical seg- 
ment and sometimes dorsal apical patches. Wing scales bluntly 
lanceolate, short, some more elongate and narrow (Plate V.) ; 
palpi densely scaled. Legs banded and spotted with white, the 
hind tarsi usually with one or more pure white joints. 
The larvae are mostly pot and puddle-breeding species, but 
some breed in marshes ; the adults mostly domestic, but some 
are wild. 
This genus was renamed by Blanchard, as my name had been 
previously used by Grassi and Feletti in 1890. . 
The scales on the abdomen vary ; some are small and spatu- 
late, others long and thin ; some have a fair number of abdominal 
scales, others only on the apical segment; they are never as 
prominently scaled as Cellia, nor are the wing scales similar. 
