238 
Psyche 
[Dec. 
otherwise the same data. Type in the collection of Dr. 
A. L. Melander; paratype in the author’s collection. 
Baccha duida n. sp. 
A quite slender fly with dilute, light brown wings and 
without alulae. The third vein is deeply drawn down 
posteriorly as it reaches the wing apex. Length 9.10 mm. 
Male. Head: face and front light brownish yellow but 
medium brown in the center of the front which merges 
into a blackish, medial, elongate spot just above the 
antennae. The antennae are short, the third segment 
thickened and rounded and light brown; the basal seg- 
ments are darker, their pile black. The front and facial 
pile is black, the face narrow, the creases deep, the face 
barely more narrow ventrally. The vertex is raised and 
rather shining black, its black pile is situated in a single 
row; the posterior part of the vertex is brownish polli- 
nose. The upper occipital pile is reddish golden and 
brassy on the sides. Thorax: mesonotum shining black 
with three slender, reddish-brown pollinose vittae; the 
outer one may possibly be divided into two posteriorly. 
The humeri, the lateral margins, the post calli and all of 
the scutellum, all the pleura except the posterior part of 
the metapleura, the lower part of the sternopleura and 
the anterior part of the mesopleura, are all light reddish 
brown ; the remainder of the pleura are dark brown and 
the disc of the scutellum viewed from the side appears 
dark brown. The mesonotal pile is sparse, fine, erect and 
brown. The ventral scutellar fringe consists of six or 
seven short black hairs. Abdomen: quite slender and 
dark brown becoming black on the posterior portion of 
the segments ; the second segment has a pair of narrowly 
separated, elongate, orange brown spots beginning just 
past the middle and margined dorsally with opaque black 
and extending down the lateral margins ; laterally these 
spots show a slight posterior indentation. The third 
segment has a similar pair of spots in the middle, longer, 
anteriorly attenuated and with V-shaped notch posteri- 
orly. The fourth segment has a similar pair of spots of 
about the same size. The spots on both the third and 
