ART. 11. GENUS MESEMBRINELLA GIGLIO-TOS—ALDRICH, rat 
only a few weak marginals. Genital segments small, brown, the fifth 
abdominal not visible at their base; fifth sternite small, yellow, with 
V-shaped incision, no apical bristles. 
Femora rather slender; middle and hind tibiae brown, somewhat 
swollen, the latter especially are nearly as large as their femora. 
Wings yellow, more brown apically, with a well-marked brown sub- 
costal stripe beyond middle, which is as usual not sharply limited. 
Length, 11 mm. 
One male, Brazil, ‘‘ Collection Coquillett,” collector unknown. 
Type.—Male, Cat. No. 25250, U.S.N.M. 
MESEMBRINELLA (MESEMBOLIA) BELLARDIANA, new species. 
Mesembrinella quadrilineata Faxsricius, Giglio-Tos, Boll. R. Univ. Torino, vol. 8, 
No. 147, 1893, p. 4; Ditteri del Messico, pt. 4, 1895, p. 12.—Surcour, Revis. 
Musc. Test., 1919, p. 75. 
Mesembrinella quadrilineata Gieau10-Tos, not Fabricius, Surcouf, Revis. Musc. 
Test., 1919, p. 75. 
Inasmuch as Surcouf placed the Fabrician species in Ochromyia, he 
recognized the name of Giglio-Tos as valid for the present one, credit- 
ing Giglio-Tos with the authorship. In combining his genera I am 
obliged to find a new name for the latter species. Since Bellardi was 
the one who first identified the specimens, I commemorate his work 
on the Mexican Diptera in the name I choose. 
Female.—This species is of general brownish-yellow color, the abdo- 
men except the base metallic blue green. Front about 0.23 of head 
width, with two orbitals and one pair of cruciate bristles; facial ridges 
depressed in the middle, hairy from vibrissae up to lower third of 
antennal joint; palpi large and broad; proboscis small; bucca one- 
sixth the eye height. Thorax dark brown dorsally. Chaetotaxy: 
acrostichal 2, 1; doroscentral 2,3; humeral 2; posthumeral 2; pre- 
sutural 2; notopleural 2; supraalar 3; intraalar 2; postalar 2; sterno- 
pleural 2, 1; scutellum with 1 apical, 2 lateral (both close to base), 
1 discal. 
Abdomen metallic blackish green above from beyond middle of 
second segment, below only from middle of third segment. ‘Third 
and fourth abdominal segments with weak marginal row of bristles. 
Legs yellow; hind femora with dense row of hairs above to beyond 
middle and one bristle beyond at second third of length. Wings 
brownish, with a heavy blackish subcostal stripe beginning at tip of 
auxiliary; beyond tip of second vien is a small paler spot, and a very 
narrow one lies beyond the tip of the first vein. First posterior 
very wide open, the intercepted costal segment being half as long as 
the hind cross vein. 
Length, 12 mm. 
