19. 
HYSTRISIPHONA. 
Costa of the wings without bristles or spine ; posterior cross- 
vein beyond the middle between the small cross-vein and 
the curvature of the fourth vein 
Abdomen conical or elongate-oval woe ee 
Abdomen cylindrical or elongate-conical, much longer than 
the thorax . 
. Middle legs of the male disproportionately long . 
Middle legs not or scarcely longer than the others . 
. Apical cell widely opened; wings unicolorous 
Apical cell narrowly opened ; wings unicolorous, nearly hyaline. 
. Anal segment shorter than the preceding segment; eyes 
bare . sone Loe oe 
Anal segment very elongate i in the male ; eyes pilose 
. Abdomen cylindrical, much longer than the thorax, and 
attenuated at the base . . woe ees 
Abdomen oval, conical, or subeylindrical, but not narrower at 
the base 
. Antenne inserted distinctly above a line drawn through ‘the 
middle of the eyes (arista very long) . . tee 
Antenne inserted on or below a line drawn through the 
middle of the eyes . 
. Third vein with a row of bristles . 
Third vein without bristles (except at the base) Lee 
. Abdomen yellow, with or without black markings . 
Abdomen black, sometimes with whitish or cinereous portions . 
. Apical cell broadly opened . 
Apical cell narrowly opened 
.. Curvature of the fourth vein arcuated . 
Curvature of the fourth vein angular 
. Arista short-haired 
Arista distinctly plumose 
. Eyes bare . 1. 1. we eee ee 
Eyes pilose . 
HYSTRISIPHONA. 
Hystrisyphona, Bigot, Revue et Mag. Zool. 1859, p. 309. 
213 
19. 
20. 
tal \ 
4 ay 
21 ee ee 
Sb ¥ 
° pee AS .¢ \ rian, ub 
Cholomyia, Big. 72 ¥ em wat 4, ue 
Melaleuca, v. d. Wulp. IK. 
Euantha, v. d. Wulp. 2.4 ¥ ap 
22. 
W Ce Ley moa 
a iW. pls uf 
Leptoda, v.d. Wulp. 2 52 
Uramyia, Rob.-Desv. 2-5; 
Cordyligaster, Macq. 25 2 
24. 
Chetona, v. d. Wulp. 2 S53 
20. 
Thelairodes, v.d. Wulp. 2 5°¥ 
26. 
27. 
28. 
Xanthodexia, v. d. Wulp. 2 9G 
Calodexia, v.d. Wulp. 257 
Rhombothyria, v. d. Wulp. 2 $9 
29. 
Pseudomorinia, v.d. Wulp. 2 S~7 
30. 
Morinia, Meig. “2-GO 
Comyops, v.d. Wulp. 2 G2 
The genus Hystrisiphona is easily recognizable by the very long and filiform pro- 
boscis and the plumose arista, and by the scutellum and abdomen being densely covered 
with spines. | 
1. Hystrisiphona nigra. 
_ Hystrisyphona nigra, Bigot, |. c. 
Hab. Mexico (coll. Bigot). 
