Genus Dendromyia. 317 
Thorax ochraceous brown, covered with flat spindle-shaped 
black scales, some with violet reflections ; scutellum ochraceous, 
with large flat black scales ; metanotum brown, with a dense tuft 
of brown bristles ; pleurae ochraceous, with flat scales. 
Abdomen black, with basal ochraceous lateral spots, triangular 
in form ; basal segment testaceous, with a few violet scales. 
Legs brown to almost black, paler brown at the base ; femora 
yellowish beneath, unbanded ; ungues equal and simple. 
Wings with rather broad elongated triangular scales on the 
apices of the first to fourth veins, the base of the second with a 
few very long scales, some ending convexly ; first sub-marginal 
cell longer and narrower than the second posterior cell, its base 
nearer the base of the wing, its stem about one-third the length 
of the cell; stem of the second posterior equal to rather more 
than half the length of the cell; posterior cross-vein not quite 
its own length distant from the mid cross-vein. 
Halteres with pale stem and fuscous knob. 
Length.—3°5 mm. 
Habitat.—Para, Brazil (Dr. Durham). 
Observations.—Described from a single 9. To some extent 
this species resembles P. Trinidadensis, but the absence of any 
white on the legs will at once separate it from that species, and 
more especially the shorter proboscis and more densely scaled 
wings. The peculiar knob-like patch of yellow scales between 
the upper surface of the eyes is also very characteristic. 
DENDROMYIA QUASILUTEOVENTRALIS. nh, sp. 
Thorax dark brown, with broad dusky scales ; pleurae testa- 
ceous, with white scales ; scutellum deep brown, with large dark 
scales ; metanotum deep brown. Abdomen deep brown to black 
above, pale golden below, unadorned. Legs deep brown to black, 
the hind metatarsi longer than the hind tibiae. Wings densely 
scaled with rather broad scales ; stem of the first sub-marginal 
about one-half the length of the cell. 
¢. Head deep brown, covered with flat brown scales, a 
small white border round the eyes and a white line between 
them ; antennae and palpi and proboscis black ; clypeus covered 
with frosty grey sheen. 
Thorax black, covered with irregularly-scattered flat dusky- 
brown scales, largest over and in front of the wings, where there 
are a few brown bristles ; scutellum deep brown, covered densely 
