SUBFAMILY MESEMBRINELLINAE 69 
Thorax blackish brown, darker on dorsum; sternopleuron with 
pale hair only; mesothoracie spiracle without dark hair on the 
lower margin. 
Abdomen with first segment yellow, the posterior margin 
narrowly purplish black; second segment yellow, the posterior 
margin widely purplish black in center on dorsum, more nar- 
rowly so laterally; third and fourth segments deep metallic 
purplish or greenish black. 
Genital segments (pl. 10 E and F) orange with black setae. 
Female. Similar to male, with the usual normal sexual differ- 
ences, and differing from the female of bicolor in having but one 
proclinate frontoorbital bristle. 
Length. 9-11 mm. 
Type. Male, No. 53112, in the U. S. National Maen 
Type locality. Barro Colorado Island, Canal Zone, Panama. 
Thirteen specimens including the holotype were collected 
in fruit fly traps during August and September 1936 by 
James Zetek; 13 additional specimens were collected during 
January 1929 by C. H. Curran in the same locality; 2 specimens 
are in the collection from Higuito, San Mateo, Costa Rica, ecol- 
lected by Pablo Schild. The species is not uncommon in the 
tropical rain forests of both east and west coasts of Guatemala 
and Nicaragua during the month of May. 
Huascaromusca bicolor (Fabricius), new combination 
Musca bicolor Fabricius, Systema Antliatorum, p. 291, 1805; 
Wiedemann, Aussereuropaische zweifltigelige Insekten, vol. 
2, p. 392, 1830. (Type, female from South America, in 
Copenhagen, Denmark.) 
Calliphora socors Walker, Roy. Ent. Soc. London, Trans, (n. 
ser.) 5:311, 1858. (Type, female from Mexico, in the 
British Museum.) 
Leptoda bicolor (Wiedemann), Brauer and Bergenstamm, Zwei- 
fligler des Kaiserlichen Museums zu Wien, vol. 6, no. 3, 
feeloe, Lous, 
Mesembrinella bicolor Giglio-Tos, Mus. di Zool. ed Anat. Comp. 
R. Torino, Bol. 8(147) :4, 1898; R. Acad. Sei. Torino Mem. 
(2)45:11, 1895; Sureouf, Paris Mus. d’Hist. Nat. Nouvelle 
Arch. (5)6:70, 1919 (in part). 
Mesembrinella aeneiventris Van der Wulp, Biologia Centrali- 
Americana, Insecta, Diptera, vol. 2, p. 301, 1896. (Cotypes, 
[both sexes] from Mexico, in the British Museum.) 
