Sept. 21, 1914 
Papaya Fruit Fly 
449 
width; occiput, frons, face, and cheeks yellow, a black transverse patch at the ocellar 
triangle, a diffuse smoky patch over insertion of antennae and another along oral margin, 
and a black spot crossing cheeks from lowest part of eye; antennae piceous or dull 
ferruginous, the third joint elongate, rounded at apex, the arista inserted close to its 
base, nearly twice as long as the joint, very slender, with very fine ciliation; proboscis 
and palpi black. Thorax convex, broadest at wing base, narrowed anteriorly, yellow, 
with a ferruginous shade on the disk, the mesonotum with several pairs of abbreviated 
blackish stripes and a transverse spot in front of the scutellum, the pleurae with three 
irregular, transverse, blackish bars; scutellum yellow, with sharp black lateral angles; 
postnotum ferruginous and black. Abdomen pedunculate, with six well-defined 
segments, of which the second is much the longest; venter channeled at the sides; 
colors yellow and dull brown, with dark diffuse bands at apex of first, middle of second, 
and bases of the following segments; ovipositor longer than the body, slender, cylin¬ 
drical, strongly curved, thickened basally, ferruginous. Tegs slender, rather long; 
femora yellow, ferruginous at bases and apices and with a dark oblique band near mid¬ 
dle; tibiae yellow and ferruginous, the anterior pair darker; tarsi ferruginous, shading 
to brown, densely pubescent. Wings long, rather narrow, rounded at apex, all the 
cells much elongated; second vein with an angulation or loop opposite the end of the 
first vein and usually just beyond this with a slighter one, which in many specimens 
sends out at right angles a spur toward the costa; last section of the fourth vein sinuate; 
lower end of posterior cross vein close to wing margin; anal cell with the lower angle 
drawn out very long and narrowly; colors hyaline and ferruginous yellow, the yellow¬ 
ish color involving the anterior region to the second basal cell and the anterior por¬ 
tions of the first basal and first posterior cells, as well as the anal and the base of the 
third posterior cell. Length: Body, exclusive of ovipositor, 8.5 to 12 mm.; ovi¬ 
positor (measured in a straight line from base to tip) 9 to 14 mm.; wing, 8.5 to 12.5 mm. 
Male (PI. XLI, fig. 2).—Closely resembles the female in coloration and general 
appearance, without the ovipositor. The abdomen is pedunculate and blunt at the 
tip, less distinctly banded than in the female and more hairy; the frons is slightly 
wider; the spur of the second vein usually joins the costa, and shortly before this there 
is often in addition a short spur projecting into the submarginal cell. Length: Body, 
11 to 13.5 mm.; wing, 8.5 to 11 mm. 
THE EGG 
The eggs (PI. XLII, fig. 1) are of very unusual shape. They are very long and 
slender, fusiform in the micropylar half, the opposite half drawn out into a cylindrical 
stalk. The length of the entire egg is from 2.55 to 2.75 mm., the greatest diameter 
0.18 to 0.2 mm., the diameter of the attenuated portion 0.06 to 0.07 mm. The surface 
is smooth, without reticulation or sculpture. 
The eggs were procured from gravid females by dissection. The num¬ 
ber of eggs produced by a single female appears to be slightly in excess of 
100; the counts from two females, both showing a distended abdomen 
and probably containing a nearly full complement of eggs, gave 103 fully 
developed eggs in each case. No eggs in process of development were 
present, which indicates that all the eggs are disposed of within a short 
period. 
THE LARVA 
The larvae (PI. XLII, fig. 2) are shining, dirty greenish white in color 
while feeding upon the interior seed mass. Larvae that have matured 
within the ripened fruit and that have penetrated into the meat are the 
same rich golden-yellow color as the ripe fruit. 
Form moderately stout, subcylindrical, tapered anteriorly to the mouth, highly 
polished; head segment closely transversely striate beneath, mouth hooks blunt, well 
separated; anterior spiracles with about 2 5 lobes; body segments nearly smooth above, 
ventrally with a transverse callosity at the anterior margin, beyond the third segment 
also with a callosity at the posterior margin, the surface of these callosities with nu¬ 
merous, irregular, transverse, raised, punctate striae, segments beyond the third also 
with a deep median transverse impression; posterior end truncate, the stigmatal area 
slightly depressed, surrounded by a groove; stigmatal plates small, separated by about 
their own width, each with three transverse, straight slits, slightly diverging out¬ 
wardly; anal tubercles small, upon a swelling bordered by two callosities. 
