Genus Quasistegomyia. 
Quasistegomyia dubia. nov. sp. 
, 133 
# 
Head black with a median snowy white area and a small 
white patch on each side; proboscis black ; palpi nearly as long 
as the proboscis, acuminate, no hair tufts, black, the two last 
segments with basal snowy spots, a broad median white band 
and a narrow basal one; antennae with deep brown plumes. 
Thorax black, with a median patch of flat silvery-white scales in 
front near head, a large patch of snowy-white large broad curved 
scales on each side ; a smaller patch in front of the wings, a 
Fig. 46. 
Pseudostegomyia dubia. S'. Head. 
patch of flat white scales behind on each side of the bare space 
in front of the scutellum • scutellum with flat silvery-white scales. 
Abdomen black, with basal white bands. Legs black, mid 
femora with a silvery spot at apex and on apical half ; metatarsi 
of fore and mid legs and first tarsal with basal white bands, hind 
femora also with spots and a white basal band on second 
tarsal. 
$. Head clothed with flat black scales over most of its 
surface, two rows of flat silvery-white median scales, narrow 
dark line between, flat white scales at the sides, dusky upright 
