The species of this group very much resemble the Ortaline, but differ from them in 
having the frontal bristles reaching to near the base of the antenna, and in the want of 
The end of the auxiliary vein runs in a perpendicular direction to the costa, 
The wings also have, except in a few species, very 
a clypeus. 
where it often becomes obsolete. 
TRYPETINA. 
Group TRYPETINZ. 
handsome markings. 
The numerous Central-American Trypetine examined may be referred to the 
following genera :— 
l. 
ww 
10. 
11. 
12. 
. Wings long and narrow ; 
Wings with dark cross-bands or spots, sometimes blackish with 
hyaline incisions, but never with a reticulated aspect 
Wings reticulated with fuscous, the dark coloration interrupted by 
numerous rounded, small, hyaline or clear dots 
. Scutellum with six bristles 
Scutellum with four, sometimes with two bristles 
. Wings with dark or yellowish, rather narrow cross-bands or streaks, 
which sometimes are largely interrupted aud reduced to spots 
Wings blackish, with hyaline incisions . 
. Fourth vein distinctly curved upwards at its end. 
Fourth vein not curved upwards at its end . 
. Wings with four very oblique yellowish cross-bands . 
Wings with less regular, rather narrow cross-bands, which are often 
interrupted or even reduced to spots . 
. Incisions of the blackish coloration very large and deep, the wings 
thus appearing to have large, partly connected, dark cross-bands. 
Incisions of the blackish coloration small and marginal; usually a 
few hyaline dots on the disc. 
. Scutellum unusually swollen 
Scutellum only slightly convex 
. Cross-veins distant ; the small cross-vein on the middle of the discal 
cell. . 
Cross-veins closely approximated . Loe ee ee 
second vein straight ; scutellum with two 
bristles . . Soe eee ee 
Wings broad, with a white apical border ; second vein undulate; 
scutelium with four bristles . Se ee 
Scutellum with six bristles; some of the veins of the wings bristly . 
Scutellum with four, seldom with two bristles. an 
Wings very broad with rounded tip, the central portion or nearly 
the whole surface with a very fine reticulation . . 
Wings of normal shape, with a more scattered reticulation . 
Tip of the wings with a narrow white border or with small white 
spots soe ee 
Tip of the wings broadly yellow with hyaline stripes or spots. 
BIOL. CENTR.-AMER., Dipt., Vol. II., September 1899. 
401 
10. 
Hexacheta, Low. 
3. 
4., 
6. 
Anastrepha, Schiner. 
5. 
Plagiotoma, Low. 
Sptlographa, Low. 
7. 
9. 
Céidaspis, Low. 
8. 
Rhagoletis, Low. 
Polionota, v. d. W. 
Aciura, Rob.-Desv. 
Polymorphomyia, Snow. 
Blepharoneura, Low. 
11. 
12. 
13. 
Eutreta, Low. 
Acrotenia, Low. 
3 f 
