1949] 
Hull — Syrphid Flies 
127 
and throughout the entire marginal cell, subcostal cell 
and all of the submarginal cell. The stigmal cross vein 
is distinct and well formed. The marginal cell is widely 
open. Abdomen: black with a distinct metallic appear- 
ance ranging from brassy for the most part to patches 
of bluish or coppery color. The pile of the first segment 
is pale yellow ; on the remainder of the abdomen the pile 
is long and thick and light reddish brown, and the ground 
color is not obscured. Along the lateral margins of the 
third and fourth segments the pile is pale yellow but 
along the lateral margin of the second segment and more 
widely towards the base there are numerous long black 
hairs and a fewjong black hairs on the lateral margin of 
the fifth segment. Sternites shining black with very long 
pale yellow hair. 
Holotype : female, F. Sinchono District, Huanuco, 
Peru, Aug. 20, 1947, Jose Schunke. 
Meromacrus matilda n. sp. 
A dull black species with reduced quantity of yellow 
tomentum. Related to brunneus Hull, it is a smaller spe- 
cies and the anterior diagonal band of tomentum upon 
the thorax ends at the inner end of the humeri and the 
sutural band of similar tomentum extends the length of 
the suture. Length 10-11 mm. 
Female. Head: face and cheeks black, the former with 
a wide band of pale yellowish white or grey pubescence 
which extends across beneath the antennae. The pile of 
the face is pale yellow and extends together with the 
pubescence narrowly up the sides of the front. The 
front is black, shining on the lower half with extensive 
brown pollen across the upper half. The vertex is black, 
its pile and that of the front black except along the eye 
margins where the frontal pile is yellow. The antennae 
are black ; the third brown becoming paler apically, and 
is somewhat thickened. The eyes are bare, the occiput 
conspicuously covered with pale, creamy yellow tomen- 
tum extending to the vertex. Thorax: the mesonotum is 
black; there is a not very conspicuous, moderately wide 
band of pale yellow tomentum placed diagonally forward 
