104 THE NORTH AMERICAN SPECIES OF DROSOPHILA. 
minute. Only one prominent oral bristle. Carina broad and flat; face pale yellow. 
Cheeks brown; their greatest width about one-sixth greatest diameter of eyes. Palpi 
yellow, brownish at base; with three small apical bristles. Eyes with short, thick pile. 
Acrostichal hairs in six rows; no prescutellars. Mesonotum velvety black, with a 
reddish-yellow spot in front, between the dorsocentral rows, a pair of narrow yellowish- 
gray median stripes, and an irregular grayish mark behind on each side; humeri yellowish. 
Scutellum dull grayish-black, velvety at base. Pleure blackish brown. Legs brown, 
femora darker. Apical and preapical bristles on first and second tibiz, preapicals on third. 
Abdomen black, each segment with an interrupted gray basal band. 
Wings with the following blackish areas: one including the basal portion of the wing, 
up to tip of first vein, and including also most of the area behind the fifth vein (a clear 
region from middle of first section of costa to apex of anal cell); one on anterior cross-vein; 
one in marginal cell, just above the last; one, connected with the first area mentioned by 
an infuscation, including the region of the posterior cross-vein, a U-shaped region with its 
ends in the costa and its base in the first posterior cell, and a process from this region that 
includes the apical half of the last section of the fourth vein; one at the tip of third vein. 
Costal index about 2.1; fourth-vein index about 1.2; 5z index about 0.7; 4c index about 0.7. 
Length body 2.3 mm.; wing 2.5 mm. 
Specimens examined: Havana, Cuba. Schiner described the species 
from material collected in ‘South America.” 
The chromosomes, reported by Metz, are described on page 39. 
Drosophila calloptera ornatipennis Williston. 1896. Trans. Ent. Soc. London, 407 (as 
Drosophila ornatipennis, new species). 
Like D. calloptera Schiner, except as follows: Mesonotum dark brown, pattern yellowish; 
legs yellow, femora usually brown; no spot in marginal cell above anterior cross-vein. 
Specimens examined: St. Vincent, West Indies (Williston type material). 
This species is figured in Williston’s Manual of North American Diptera 
(1908, p. 300, fig. 5, wing). 
I have given ornatipennis as a synonym of calloptera (1916, Ann. Ent. 
Soc. America, 9, 327), but a re-examination of the matter has convinced 
me that Williston’s form is deserving of varietal rank. 
Drosophila superba Sturtevant. 1916. Ann. Ent. Soc. America, 9, 342. 
9. Arista with eight branches above and four below. Antenne brown, third joint 
dark. Front about one-third width of head, wider above; yellow. Second orbital scarcely 
more than a hair. Only one prominent oral bristle. Carina low and narrow, confined to 
upper part of face; face yellow. Cheeks yellow; their greatest width scarcely one-sixth 
greatest diameter of eyes. Eyes sparsely clothed with very short, fine pile. 
Acrostichal hairs in about ten rows; no prescutellars; a single pair of dorsocentrals. 
Mesonotum yellow, with two pairs of interrupted brownish longitudinal stripes, the median 
pair broader than the outer. Scutellum brownish yellow. Pleurz yellow, with two longi- 
tudinal dark reddish-brown stripes. Legs yellow. Apical and preapical bristles on first 
and second tibie, preapicals on third. 
Abdomen dark brown, yellow at base. 
Wings brownish black, with four hyaline areas: one at base; one including the apical 
part of the costal cell and extending to the anal cell; a band extending directly across the 
wing about its middle, between the two cross-veins; a spot reaching from the middle of the 
first posterior cell to the wing-margin in the second posterior cell. Costal index about 3.0; 
fourth-vein index about 1.2; 52 index about 1.0; 4c index about 0.7. 
Length of body 3 mm.; of wing 3.2 mm. 
Specimen examined: Cacao, Trece Aguas, Alta Vera Paz, Guatemala 
(Schwarz and Barber). This specimen, in the U.S. Nat. Mus. collection, 
is the only one known, and is the type of the species. 
Figure 49 shows the strikingly marked wing of this species. 
Drosophila opaca Williston. 1896. Trans. Ent. Soc. London, 411. 
o', 2. Arista with about eight branches above and three below. Antenne blackish 
brown. Front over one-third width of head, wider above; velvety black. Second orbital 
