Genus Dendromyia. 315 
Habitat.— British Guiana, Demerara River (Dr. Low). 
Observations.—Described from four females. It comes near 
D. luteoventralis, Theobald, from Para, but is rather smaller and 
of a more ochraceous tint, and the head is all dark scaled, there 
being no median pale scaled area ; moreover, the thoracic scales 
are smaller and the wing scales more elongated. The specimens 
were taken by Dr. Low in the forest near Demerara River at 
twelve noon in subdued light, 
DENDROMYIA ASULLEPTA. Nn. Sp. 
Head with a pale scaled median line. Thorax ochraceous, 
with two dark areas in front, dusky before the scutellum, covered 
with black spindle-shaped scales and some flat yellow ones at the 
sides, and forming a small area in front of the wings ; prothoracic 
lobes with flat yellow scales. Abdomen deep dusky brown above, 
ochraceous below. Legs brown, unbanded. 
2. Head covered with flat violet scales, except a yellow 
patch in the middle in front; proboscis, palpi, and antennae 
deep brown. Thorax ochraceous, with two dark patches on each 
side in front and a dusky patch behind (partly denuded), covered 
with spindle-shaped, almost black scales, with a few flat yellow 
' ones at the sides, and forming more or less of a patch on each 
side behind the wings; prothoracic lobes yellow scaled ; pleurae 
bright ochraceous with flat pale ochraceous scales ; metanotum 
bright ochraceous, with two prominent and some smaller bristles. 
Abdomen ochraceous, covered with dusky black scales : venter 
pale. 
Legs brown (ochraceous when denuded), paler at their bases ; 
the ungues are small, equal and simple and more curved than in 
the closely related D. ulocoma. 
Wings with the veins covered with brown scales, rather short 
and broad and some with slightly asymmetrical convex apices, 
some, especially those on the stem of the second, third and stem 
of the fourth long veins more elongated ; second long vein carried 
weil past the marginal cross-vein ; the first sub-marginal cell longer 
and narrower than the second posterior cell, its base nearer the 
base of the wing, its stem equal to one-third the length of the 
cell ; stem of the second posterior as long as the cell; posterior 
cross-vein about a third of its length distant from the mid. 
Halteres ochraceous, with a few fuscous scales on the knob. 
Length.—3 mm. 
