BEN) P. Leander Czerny: 
3. Helomyza distigma V. d. Wulp 3%. 
1597 Helomyzxa distigma, Van der Wulp in: Biolog. Centr.-Amer., 
Dipt. I. 352 und Tab. IX. Fig. 5, wing. 
»Rufo-testaceous; antennae and legs rufous; two rounded spots 
in the first posterior cell, in addition to the other blackish markings 
on the wings. 
g. Head pale rufous; front much broader than the eyes; 
ocellar point shining brown, emitting two bristles, which are curved 
forwards; exterior to these are two other bristles!) and on each side 
of the vertex a pair of postvertical bristles?); face and cheeks broad; 
two weak vihrissae at the oral margin. Antennae rufous, short; 
3. Joint rounded; arista black, nearly bare; proboseis and palpi 
rufous. Thorax and scutellum testaceous; thoracie dorsum with numerous 
hair-points; pleurae with a brown stripe from the shoulders to beneath 
the base of the wines; the sides of the thorax with some bristles; 
seutellum with 4 bristles, one on each side and two at the hind 
marein; metanotum rufous. Abdomen greyish-brown, the anal segment 
slobular and more rufous; the segments with some marginal and 
lateral bristles. Legs rufous, tips of the tibiae and the last three 
points of the tarsı blackish; hind tibiae with an indistinet brown ring 
near the base; femora rather robust, hairy beneath, the first and 
third pairs each with a row of bristles on the upperside; tibiae with 
a praeapical bristle. Halteres pale rufous. Wings greyish, with a row 
of short costal bristles, and with a blackish costal border, covering 
the mediastinal cell and from there extended to the tip of the wing, 
where it becomes narrower, to the end of the fourth vein; the cross- 
veins borderd with black; a spot on the fourth vein beyond the 
posterior cross-vein, a rounded dot between the 2. and 3. veins, just 
above the small cross-vein, and two similar dots between the 3. and 
4. veins. Small cross-vein a little beyond the end of the first vein 
and beyond the middle of the discal cell; posterior cross-vein straight 
and slightly oblique. 
Q. Differs from the male im having the abdomen pointed 
towards the apex, the arista shortly plumose, and the legs more slender 
and less hairy; the femora have a brown spot on the uperside near 
the tip, and the tibiae dark rings near the base; the markings of 
the wings are similar, only the blackish dot between the second and 
third veins is wanting.« Länge: 5—7 mm. — Vorkommen: Mexico. 
fr MR) Orbitäl- und äußere Vertikalborsten ? 
2) Postvertikal- und innere Vertikalborsten ? 
