SPILOGASTER. 321 
Several female specimens. One of them has a somewhat rufous abdomen and the 
dark spots on it less regular. As it agrees in other respects, it is probably a variety. 
3. Spilogaster copiosa, sp.n. ¢ 2. (Tab. VIII. figg. 5, ¢ ; 5a, head in 
profile, 3.) 
Cinereous ; antenna, palpi, four thoracic stripes, and four (or six) spots on the abdomen, black ; legs blackish, 
with testaceous tibie (¢), or rufous, with black tarsi (9 ). 
Length 7:5 millim. 
Front in the male very narrow, but separating the eyes, with the frontal band black, linear; front in the 
female cinereous, broader than the eyes, with the frontal band black, divided into two stripes, which are 
convergent towards the antenne ; face and cheeks grey, with some white reflections, the face slightly 
concave; lower part of the cheeks nearly equalling one-third of the longitudinal diameter of the eyes ; 
vibrisse at the oral margin; underside of the head with many bristles. Antenne black, inserted on the 
median line of the eyes; second joint bristly ; third joint two and one-half times as long as the second, 
reaching to near the vibrisse; arista moderately long-plumose. Proboscis and palpi black, the palpi 
cylindrical. Thorax, scutellum, and abdomen cinereous; thoracic dorsum with four black stripes, 
which are interrupted at the transverse suture; two dorso-central bristles before and three behind the 
suture ; scutellum somewhat trigonal. Abdomen of the male conical, truncated at the end, with three 
pairs of rounded brown or blackish spots—on the first, second, and third segments, those of the first 
segment smaller and often less distinct. Abdomen of the female more convex, pointed towards the tip, 
with four similar spots, those of the first segment being usually absent. Abdomen in both sexes with 
macrochtz on the anal segment and in a marginal row on the third segment; in the male the macro- 
chetee are mixed with bristly hairs. Legs slender, with the tarsi longer than the tibia; in the male 
they are black, with the knees and tibie testaceous ; in the female the femora and tibia are rufous, the 
upperside of the front femora (sometimes also that of the other femora) and the tarsi being black ; foot- 
claws and pulvilli elongate in the male, the pulvilli yellowish. Tegule whitish. Wings brownish- 
hyaline, in the female often with a costal spine; small cross-vein under the end of the first vein and 
distinctly beyond the middle of the discal cell; third and fourth veins nearly parallel; terminal section 
of the fourth vein in the male more than double as long as the penultimate section, in the female much 
shorter (3:2); posterior cross-vein slightly undulate. 
Hab. Mexico, Xucumanatlan, Omilteme, and Sierra de las Aguas Escondidas, all in 
Guerrero, 7000 to 9500 feet (A. H. Smith). 
Many specimens of both. sexes. 
4, Spilogaster parvula, sp.n., 3 9. 
Cinereous ; stripes on the thorax, four spots on the abdomen, antenne, palpi, and legs, black. 
Length 4°5-5°5 millim. 
Closely allied to the preceding (S. copiosa), but much smaller in size. The external stripes on the thorax 
often less conspicuous ; the spots on the first abdominal segment always wanting; the legs black in both 
sexes, with the knees and tibie only sometimes slightly testaceous; the wings clearer, without any 
brownish tinge; the posterior cross-vein straight and more perpendicular, especially in the female; a 
costal spine is mostly present. 
Hab. Mexico, Tepetlapa, Amula, and Omilteme, all in Guerrero, 3000 to 8000 feet 
(H. H. Smith). 
Several specimens. 
BIOL. CENTR.-AMER., Dipt., Vol. II., December 1896. 2t 
