EUARESTA. 425 
4, Kuaresta angustipennis, sp.n.,¢ 2. 
Cinereous ; head and legs rufous; wings fuscous, the base, two incisions beyond the stigma, several incisions 
around the tip and along the hind margin, and some dots in the centre, hyaline. 
Length 4°5 millim. 
Head pale rufous; front much broader than the eyes, flattened ; frontal bristles long, brown ; behind the 
eyes arow of yellow bristles; face slightly excavated; cheeks broad, their inferior portion equalling 
more than half the longitudinal diameter of the eyes. Antenne rufous; third joint rounded at the tip, 
reaching to the middle of the face. Proboscis and palpi rufous, the palpi long and slender. Thorax, 
scutellum, and abdomen cinereous; thoracic dorsum with yellow hairs; pleurs and metanotum more 
rufous; in the sides ot the thorax some long black bristles; scutellum with four bristles. Abdomen 
ovate, slightly convex ; ovipositor of the female shining brownish-black, as long as the apical segment 
and truncated at the tip. Legs rufous; fore femora with bristles on the upper and under sides. Halteres 
pale rufous ; tegule distinct. Wings narrower than in the preceding species (4. rufula): stigma black, 
without clear dots ; the base hyaline, with two brownish stripes on the costa between the humeral cross- 
vein and the stigma, otherwise not reticulated; beyond the stigma two hyaline incisions, which are 
prolonged by two rounded dots between the second and third veins; several incisions round the tip and 
along the hind margin of the wings; on each side of the small cross-vein a rather large hyaline dot; two 
similar dots in the first posterior cell, at the inner side of the apical incision, and three dots of different 
sizes in the discal cell. 
Hab. Mexico, Mexico city (H. H. Smith). 
Five specimens (four males and one female). 
5. Euaresta scitula, sp. n., ¢. H. angustipennis, v. d. W. 
Black; head and legs yellowish; wings fuscous, with several hyaline incisions, the basal half of the hind 
margin hyaline, in the discal cell and its vicinity many small clear dots, 
Length 4°5 millim. 
Front yellowish-cinereous, broader than the eyes, with nearly parallel sides ; frontal bristles black ; behind 
the eyes a row of yellow bristles ; face and cheeks yellow; the face slightly excavated; oral margin 
broad, not prominent. Antenne rufous, reaching to the middle of the face. Proboscis brown; palpi 
black. Thorax, scutellum, and abdomen black, but appearing cinereous, on account of a short yellowish 
pilosity ; abdomen conical, the ovipositor rather short, truncated, shining black on the dorsal, rufous on 
the ventral side. Legs and halteres yellowish-rufous. Wings rather long and narrow; the fuscous 
coloration extended to the costal cell, a stripe next the humeral cross-vein and a clear dot excepted ; 
the stigma black, without clear dots ; immediately beyond the stigma a subquadrate hyaline incision, and 
at some distance from it a similar incision of triangular shape; round the tip of the wings and at the 
apical portion of the hind margin are the usual hyaline incisions, those between the second and third 
veins no more than small dots; a rather large hyaline dot is in the first posterior cell, nearly above the 
posterior cross-vein ; several punctiform clear dots are in the discal cell and its vicinity ; the basal half 
of the hind margin is hyaline, without reticulation. 
Hab. Mexico, Northern Sonora (Morrison). 
A single female specimen. 
6. Euaresta sobrinata, sp. n., 2 (?¢ ). E. scitula, v. d. W. 
Thorax cinereous; abdomen black; head and legs yellowish-rufous; wings fuscous, with hyaline incisions 
and many small clear dots, especially in the apical region. 
Length 3°5 millim. 
Front a little broader than the eyes, rufous, anteriorly and at the orbits whitish; frontal bristles black; 
behind the eyes a row of yellow bristles ; face and cheeks yellowish ; oral margin not prominent ; cheeks 
BIOL. CENTR.-AMER., Dipt., Vol. I1., February 1900. 37 
