1942] 
Neotropical Syrphidee 
85 
Scutellar pile, except for sides and ventral fringe black. Ab- 
domen: velvet black marked as follows: a brownish-black 
shining widely separated transverse central fascia upon the 
second segment, expanded a little laterally, a more slender, un- 
broken, shining black fascia across the middle of the third and 
fourth segments. The posterior margins of second to fourth 
segments are broadly opaque yellow. Abdominal pile short, 
dense, mostly erect and whitish to yellow. Legs: femora shin- 
ing blackish, the hind pair considerably thickened in the mid- 
dle, the tibiae brownish-black, the basal third of the first pair 
and a little more than a third of the second pair brownish- 
yellow; the base of the hind pair is very dark brown. The first 
three tarsal joints of anterior and middle tarsi are light yellow- 
ish-brown; basal three joints of hind tarsi dark brown; remain- 
ing tarsal joints black. Wings: hyaline and bare, the stigma 
narrow and dark brown. 
Holotype: a male. Villarica, Paraguay, October, F. Schade 
collector. One paratype, same data. I take pleasure in naming 
this for Dr. Joseph Bequaert. 
Eristalis glabella n. sp. 
Related to fuliginosus Hull, the arista is largely whitish, the 
scutellar cuneate spot is differently shaped and the third ab- 
dominal segment is almost wholly shining, besides less dense 
pile upon scutellum and mesonotum. 
Female. Length 10 mm. Head: the front is shining black 
with an opaque, eye-marginal, elongate spot on the upper part 
of the front from the lower end of which a linear band of white 
pubescence margins the eyes all the way to the cheeks. Face 
and cheeks shining black, the sides of the former broadly white 
pubescent and sparse white pilose. The pile of the front and 
vertex is black with some white pile upon the lower part. An- 
tennae brown, the third joint oval and rounded apically; the 
arista bare, pale yellow at base and whitish on practically its 
whole length. Thorax: subopaque black, shining in front of the 
scutellum and sides of the post calli. The suture is linearly 
margined anteriorly with whitish pubescence; the humeri is 
margined anterio-medially with brown pollen and there is a 
pair of medial, obscure, brown pollinose stripes on the anterior 
part of the mesonotum. Scutellum opaque black and brown 
pollinose in an oblique light; it is sparsely black pilose and 
