DYAR-KNAB] MOSQUITOES IN GENUS MEGARHINUS 253 
Female.—Antennal segments more elongate than in the preceding 
species. Second segment hardly stouter than the succeeding ones, 
slightly thickened basally, more than twice as long as the third, the 
basal 24 with a crest of dark erect scales. Palpi blue and purple 
with many golden scales, particularly at the sides and beneath; 
apices of the segments pale violet. Second and third segments 
laterally compressed, third enlarged at the apex, fourth nearly cylin- 
drical and slightly shorter than second; third segment longest, not 
twice the length of second. 
Abdomen greenish towards base, then steel blue, the eighth seg- 
ment violet. Pale lateral spots, most conspicuous on segments 5, 6 
and 7. Sixth and seventh segments finely margined behind with 
gold, eighth segment marked with gold. Abdomen golden at the 
sides and beneath, a narrow blue median line on segments 2-7. 
Legs dark; the femora golden beneath; the middle and hind tibize 
dull golden upon the inside, the front tibiz on the outside and pass- 
ing over onto the first tarsal segment. Front and middle legs with 
- the second and most of the third tarsal segments white; hind legs 
with the fourth and all but the tip of the fifth tarsal segment white. 
Length, 6-10 mm. 
Type No. 9954, U. S. N. M. 
Locality: Trinidad (A. Busck, F. W. Urich). 
3 9, 2 g&. In the second male the markings of the middle tarsi 
are obsolete. 
MEGARHINUS HAITIENSIS new species 
Female.—Head above pearly blue, at the sides and beneath sil- 
very. Antennz: second segment twice as long as the third, hardly 
stouter, swollen basally, a crest of scales on the basal half. Palpi 
deep blue and violet with a few silvery scales, segments pale at the 
apex. Fourth segment cylindrical, slightly shorter than the second ; 
third longest, nearly twice as long as the fourth. Prothoracic lobes 
bright blue. Mesothorax very dark blue on the disc, a median 
lighter blue stripe bounded at the sides by a patch of dull brown 
scales, the sides pale bluish. Scutellum, roots of the wings and first 
abdominal segment silvery blue and green-scaled. Pleurz and coxz 
silvery. Abdomen deep blue, the seventh and eighth segments vio- 
let. Sides silvery. Venter pale golden with a broad median blue 
area. Eighth segment with terminal bristles. 
Legs dark blue and violet. Femora pale golden beneath. Hind 
tarsi only marked with white—the fourth segment, all but its tip. 
Male.—Antennz densely plumose; second segment stout, as long 
as the next three; its crest densely clothed with semi-erect scales. 
