ART. 11. GENUS MESEMBRINELLA GIGLIO-TOS——ALDRICH. i 
Lucilia segmentaria BRAUER and BercenstamM, Zweifl. Kais. Mus., pt. 5, 1891, 
p. 420 (in list). 
Hemilucilia segmentaria Braver, Sitzungsber. Kais. Akad. Wien, vol. 104, 1895, 
p- 598.—Surcour, Revis. Musc. Test., 1919, p. 55. 
All the published references are to material from South America. 
The species is represented in the United States National Museum by 
a male and four females, from Costa Rica, Panama, Peru, and Para- 
guay. Surcouf quotes the previous descriptions and gives a new one 
in detail from the type. The species is easily recognized by the 
characters already mentioned. The front in the male is black only 
at the vortex and much narrower outside the frontal bristles than 
in macellaria. 
HEMILUCILIA FUSCANIPENNIS Macquart. 
Lucilia fuscanipennis Macquart, Dipt. Exotiques, Suppl., vol. 4, pt. 2, 1851, 
p- 223. 
Described from Bahia, Brazil; the United States National Museum 
has a male and four females, from Panama and Costa Rica, identified 
as Phormia fuscanipennis by Coquillett, and placed in Hemilucilia 
by Townsend. Itis asmaller and darker species than the preceding, 
the front black nearly to the antennae, where there is a sharp change 
to yellow. 
Genus CHLOROPROCTA Van der Wulp. 
Chloroprocta VAN DER Wu-y», Biol. Cent. Amer. Dipt., vol. 2, 1896, p. 296. 
Nearly allied to Cochliomyia Townsend, with which it has in com- 
mon the ciliation of the stem vein of the wing; vibrissae a little above 
the edge of the mouth and somewhat approximated to each other; 
acrostichal and dorsocentral bristles except the hindmost very small 
and hardly discernable; lower part of head strongly developed; face 
straight and almost vertical; frontals extending slightly below inser- 
tion of antennae; hind calypter bare beyond the fold. It differs in 
having the head much flatter (shorter on the longitudinal axis of the 
insect), more concave behind, the upper edge thin, especially in the 
male; the female has the parafrontals outside the frontal bristles 
much narrower; the male has the eyes contiguous for some distance, 
the upper front portion with very large facets as in males of Tabanus, 
as large as the posterior ocelli but not quite equalling the front one. 
The genus would certainly have to be placed in the same tribe with 
Chrysomyia and Cochliomyia. 
CHLOROPROCTA SEMIVIRDIS Van der Wulp. 
Chloroprocta semivirdis VAN DER WULP, Biol. Cent. Amer. Dipt., vol. 2, 1896, p. 296. 
Two males and a female in the United States National Museum 
collection, from Costa Rica, Brownsville, Texas, and Colima, Mexico, 
determined by Townsend, show but little trace of the testaceous 
