1942 ] 
Neotropical Syrphidoe 
103 
ends of the brown spot turn up and down along the margin to 
enclose the intervening yellow which is almost isolated into 
elongate, oval, lateral spots. Third segment brown except for 
large basal triangles, narrowly extended two-thirds of the 
lateral length. In the brown there is a pair of central, large, 
elongate, posteriorly rounded, anteriorly attenuated, vittate 
yellow spots; these spots are at least twice as wide posteriorly 
and separated below their middle by a third of their width. 
Fourth segment with a pair of somewhat similar, longer, medio- 
posteriorly truncate, vittate spots that are widely confluent with 
a larger basal triangle. The basal triangles almost meet in the 
midline. Fifth segment similar, the central spots meet and fuse 
at the posterior margin, the smaller basal triangles are sep- 
arated from the lateral margin and are laterally continued as a 
vittae to the posterior margin. Pile appressed sparse, bristly and 
blackish; there are a few bristly hairs on the anterior margin 
of the brown of the first segment and quite long, sparse, yellow 
pile upon the sides and corners of this segment. Legs: every- 
where light yellow and yellow pilose except over the middle 
third of the hind tibiae which is black and blackish pilose. Hind 
femora reddish-brown on the basal half, darker beyond but 
yellowish at apex, its pile is chiefly black. There are a few 
black hairs posteriorly on the middle femora. Wings: light 
brown throughout, the apical portion above the third longitudi- 
nal vein and the whole of the stigmal cell darker brown. Anal 
crease long, well formed and brown. 
Holotype: a male. El Valle, Code Province, Republic of 
Panama, July 2nd, A. G. B. Fairchild collector. 
Mesogramma tubularia n. sp. 
Characterized by the elongate, parallel sided abdomen with 
double fascia and median vitta; related to flava Hull. 
Male: Length 8 mm. Head: face pale yellow, short, white 
pilose, barely tuberculate; front yellow, black pilose, with an 
elongate brownish spot in the middle. Eyes touching for a quite 
short distance. Antennae, and arista except its reddish base, 
dark brown. Thorax: mesonotum dark bluish-black, brown 
pollinose, with a prominent, continuous, medial blue grey 
vittae, and a narrow, sublateral, yellowish-brown stripe which 
ends before reaching the pale yellow humeri. Scutellum 
brownish-black, the edges narrowly diffusely yellowish -brown. 
