SuBrAMILY CHRYSOMYINAE 115 
0.27 at vertex, 0.28 at lunule; frontal rows of bristles following 
the margins of the frontale, each row consisting of about 12 
bristles; parafaciale 1.3 in width opposite lunule; vibrissae 
separated by 2.4; palpus 4.0 in length; third antennal segment 
four times as long as second; otherwise similar to male except 
for normal sexual differences. 
Length. 8.0-9.5 mm. 
Distribution. Neotropical: Carmen, Campeche, Mexico, south- 
ward to Chile. It is apparently a grassland species which is 
most abundant at elevations of from 500 to 1500 feet. Not many 
specimens have been collected and the species is possibly rather 
localized in distribution. Most of the specimens I have seen 
were collected in the vicinity of Merida, Mexico, in Panama, or 
Bolivia. 
Biology. Adults of both sexes are attracted to carcasses and 
they may be trapped in meat-baited traps. In nature, the habits 
of this species are similar to those of Callitroga macellaria. The 
immature stages are unknown. 
CHLOROPROCTA VAN DER WULP 
Chloroprocta Van der Wulp, Biologia Centrali-Americana, In- 
sects, Diptera, vol. 2, p. 296, 1896; Williston, Manual of 
North American Diptera, p. 342, 1908; Aldrich, U. S. Natl. 
Mus. Proce. 62(11) :7, 1922; Shannon, Wash. Ent. Soe. Proe. 
28(6) :126, 1926; Townsend, Rev. Mus. Paul. 15:218, 1926; 
Manual of Myiology, vol. 2, p. 168, 1934; ibid., vol. 5, p. 123, 
1937; Cushing and Hall, Wash. Ent. Soe. Proce. 39(7) :197, 
1937. Genotype. (Chloroprocta semiviridis Van der Wulp) 
= Lucila fuscanipennis Macquart. (Monobasic. ) 
Small dull dark brown species with metallic greenish reflec- 
tions, orange head, antennae and palpi, and dark brown wings. 
Male and female. Head (pl. 2, A) width greater than height in 
proportion 7:6; length at antenna slightly more than half head 
height; length at epistoma slightly greater than length at an- 
tenna; epistoma elongate, distinctly narrower than clypeus and 
warped forward from clypeal plane; metacephalon rounded in 
profile and very slightly produced; bucca produced downward; 
eye large, ovate, nearly contiguous above and the upper facets 
enlarged in male, widely separated in female; frontal rows of 
bristles extending anteriorly to middle of second antennal seg- 
ment and diverging with margins of frontale; inner vertical 
bristles decussate, strong; postvertical bristles proclinate, moder- 
ately strong; frontoorbital bristles absent in male, two small 
