DYAR-KNAB] MOSQUITOES IN GENUS MEGARHINUS 249 
Legs dark, the hind femora only with a trace of gold beneath; 
front tibiz with a trace of golden on the outside. Front and middle 
tarsi with the second and part of the third segments white; in the 
hind tarsi the fourth and all but the tip of the fifth segments white. 
Female.—The palpi are greenish blue and in proportion hardly 
differ from those of the same sex in septentrionalis. The second 
antennal segment is cylindrical and of the same diameter as the suc- 
ceeding ones, less than twice as long as the third; the sete arise 
from its middle, instead of near the base as in the succeeding seg- 
ments, and the basal half bears upon its crest a dense cluster of 
erect, dark scales. Abdomen more or less green above. Lateral 
hairs pale yellow on all the segments, quite dense and coarse on the 
seventh segment where they form a kind of terminal brush. The 
lateral golden stripes are much broader than in the male and en- 
croach upon the blue median ventral. area. 
Front tibiz golden on the outside, the middle tibiz on the inside. 
On the front and middle tarsi the tip of the first segment, all of the 
second and third, and nearly all of the fourth are white; on the hind 
tarsi the tip of the third segment, all of the fourth and all but the 
tip of the fifth are white. 
Length, 8 mm. 
Type No. 903, U. S. N. M. 
Localities: Florida; Georgiana in Florida (Wm. Wittfeld). . 
3 6, 4 9. The record of Theobald and subsequent authors of 
“ Georgia ” is based on that of the above-mentioned town in Florida. 
This is the only species in which the male is known to have all the 
tarsi marked with white, but it will be noticed that even here there 
is a reduction in the white markings of the male. 
MEGARHINUS SEPTENTRIONALIS new species 
Male.—Head behind the eyes metallic blue, at the sides and be- 
neath yellowish silvery. Antennz densely plumose; second segment 
stout, laterally compressed, nearly as long as the next three and 
clothed on the upper part with golden and purple scales. Palpi 
dark violet ; the second, third and fourth segments with many golden 
and iridescent scales, their apices pale violet; terminal segment 
nearly black. Second and fourth segments of about equal length, 
the third longer, the fifth about twice as long as the fourth. Pro- 
thoracic lobes light metallic blue. Mesothorax deep purple on the 
disc, the sides and a median stripe yellow, clearly defined. A patch 
of blue scales over the roots of the wings. Scutellum edged with 
silvery yellow scales broadened to patches at the sides. Pleurz and 
