261 
Descriptions of Lantana Gall-Fly and Lantana Seed-Fly 
(Diptera). 
BY DR. J. M. ALDRICH, 
U. S. NATIONAL MUSEUM. 
(Presented at the meeting of February 2, 1922. 
LANTANA GALL-FLY. 
Eutreta xanthochaeta new species. 
Male. Very similar to Eutreta sparsa Wd., except that the bristles of 
the head and thorax are all pale yellow in color. Head brownish yellow, 
the front with numerous flattened whitish hairs, of which a row in front 
of the ocellar triangle are turned backward; a very distinct black spot 
on the orbit at the level of the first antennal joint; face with two large 
round black spots; antennae yellow, including the arista. Palpi yellow, the 
hairs at the tip blackish. 
Thorax brownish yellow. Mesonotum covered with flattened, pale yellow 
hairs; pleura of the same color, with a darker stripe just above the sterno- 
pleura; metanotum black, opaque. Abdomen reddish yellow at base, espe- 
cially on the sides, the first segment elongated, second and third with a 
transverse dark spot, the fourth mostly black. Hypopygium small, reddish. 
The hairs of the abdomen are black where the ground color is black. Legs 
yellow, the femora slightly infuscated, especially on the lower edges; the 
front femora with an irregular double row of short, yellow bristles above, 
and on the lower outer side a row of four or five longer yellow bristles 
which begin at the middle. 
Wings broad, but not circular in outline, deep brownish in color, sprinkled 
- with numerous small, whitish dots; the costal edge is white throughout, 
but very narrowly so, with an undulating border where it joins the darker 
color. This pale border becomes wider and more uniform beyond the tip 
of the second vein and ends a short distance beyond the fourth vein; from 
this point around the hind border of the wing there are about twelve 
somewhat equally spaced white dots of which the first three or four rest 
on the margin. 
Female. Ovipositor broad at base, about as long as the two preceding 
segments varying in color from reddish brown to black. Darker specimens 
show two dark spots close together below the eye, the lower one joining 
the edge of the mouth and also a median spot at the edge of the mouth. 
Length of male, 5.1 mm.; of female, including ovipositor, 6 mm. 
Described from twelve specimens of both sexes bred from 
Lantana in the Hawaiian Islands. 
Type. Male, Cat. No. 25,203, U. S. Nat. Mus., Honolulu, 
Proc. Haw. Ent. Soe., V, No. 2, September, 1923. 
