84 
Psyche 
[Sept -Dec. 
NEW SPECIES OF SYRPHID^ FROM THE 
NEOTROPICAL REGION 1 
By Frank M. Hull 
University of Mississippi 
The present study is largely based upon flies in the Museum 
of Comparative Zoology at Cambridge, and is a continuation 
of earlier studies made upon ' these collections through the 
courtesy of Professor Nathan Banks. Types unless otherwise 
specified are in the collections of the Museum. Some paratypes 
are in the author’s collection. 
Eristalis bequaerti n. sp. 
Characterized by the median pair of thoracic vittae, fused 
on the posterior half, the pattern and yellow post margins of 
the abdominal segments. Related to texanus Hull. 
Male. Length 8 mm. Head: the eyes are thickly brown 
pilose, the front and face black, the sides of both densely 
whitish pubescent and becoming brownish pubescent towards 
the middle of the front; a somewhat triangular area in front 
of the antennae is left brown to black and bare. The pile through 
the whole middle of the front is black; on the sides and face 
white and abundant. Cheeks shining black. The vertical and 
upper occipital pile is black, the antennae are dark brownish- 
black, the arista bare, the eyes touch for a short distance. 
Thorax: the mesonotum is opaque grey, bluish on an area be- 
hind the humeri and faintly brownish-grey on the remainder 
and with four black velvet vittae. The medial pair coalesces 
just behind the suture and proceeds singly to the scutellum. 
Scutellum opaque bluish-black pollinose, the center and apex 
obscurely light brown. The pile of the whole pleura and broadly 
across the front of mesonotum is whitish. The notapleural pile 
and that upon the posterior half of the mesonotum is black. 
1 Published with the aid of a grant from the Museum of Comparative 
Zoology of Harvard College. 
