1936] 
Neotropical Stratiomyidx 
53 
mal ; veins black ; basal section of the media, and branches 
M 2 and M 3 somewhat weakened. Length, 6.5 mm. 
Holotype: female, Barro Colorado Island, Canal Zone, 
June 20, 1924 (N. Banks). 
The apex of the abdomen is somewhat eaten by dermes- 
tids, but the specimen, except for the lack of genitalia, is not 
materially damaged. 
Merosargus banksi, new species 
Related to ethelia Curran, but, among other things, the 
face is wholly yellow, the metapleura are yellow, there is a 
prominent black spot on each mesopleuron, and the abdo- 
men is differently marked. 
Male. Vertex and front above black; the usual trans- 
verse white band broad ; front below this band, and all the 
face, proboscis, and palpi, pale yellow. Head pale-pilose. 
First and second antennal segments yellow, black-pilose; 
the third orange; arista brownish to black, bare. Front 
with a median, somewhat raised, polished vitta, extending 
from the white transverse band to the ocelli ; frontal orbits 
conspicuously and moderately coarsely punctured. Thorax 
metallic green shining on a black background dorsally, yel- 
lowish on the sides of the mesonotum, the black background 
extending to the lateral margins at the suture; scutellum, 
except the narrow apex, and metanotum, metallic green; a 
triangular non-metallic black spot on each mesopleuron; 
otherwise yellow. Legs yellow ; the apical third of the pos- 
terior femora black; the posterior tibiae, except for the 
median third, black ; middle tibiae blackish at the base. Pile 
of the thorax and legs pale, except for a little black pile on 
the apical tarsomeres. Abdomen black, with bluish or pur- 
plish reflections; the bases and apices of all segments yel- 
low; pile concolorous with the background. Genitalia yel- 
low. Venter brownish-yellow, with pale pile. Wings hya- 
line; veins black. Length, 7 mm. 
Holotype: male, Barro Colorado Island, Canal Zone, June 
23, 1924 (N. Banks). 
Merosargus abana Curran 
Three males, though considerably different from the 
females of this species, probably belong here. They bear 
