1933 ] 
Notes on American Trypetidse 
53 
than hyaline. A hyaline band borders the wing tip from 
about the middle of the marginal cell to the fifth vein, sepa- 
rated from the distal margin of the wing by a narrow brown 
area which begins just beyond the second vein, and extends 
to about a third of the distance between the fourth and fifth 
veins. A hyaline indentation in the third posterior cell 
opens on the lower half of the cell margin, and extends 
about two thirds of the way up the cell to end on the fifth 
vein. There is a round hyaline spot in the first basal cell, 
just before the small cross-vein, another in the very base of 
the third posterior cell, and some rather indefinite clear 
spots along the posterior margin of the wing. 
Total length of female, 5.5 mm. ; length of wing, 5.0 mm. ; 
length of ovipositor sheath, 0.6 mm. 
Described from one male (the holotype), and one female 
(allotype), in the Museum of Comparative Zoology, from 
Sara Prov., Bolivia (Steinbach) ; one male paratype from 
Sao Paulo, Brazil. 
This species seems close to Aciura falcigera of Kieffer, 
described from Argentina. It differs from Kieffer’s de- 
scription and figure in several ways, most notably in the 
wing pattern. The apical narrow hyaline spot of falcigera 
is lacking in ligularis; the sickle-shaped hyaline band which 
parallels the wing tip does not reach the costa above in 
falcigera, and so forth. 
Genus TETREUARESTA Hendel 
Hendel, 1928, p. 368 (type, Trypeta obscuriventris Loew) 
This genus is included here because of the wing pattern 
of the following new species; the described species of the 
group all have a typical “Euaresta” pattern. The genus is 
sufficiently well characterized by Hendel, l.c. 
■ 
Tetreoaresta bartica, sp. nov. 
Fig. 4. 
$ $ The front is yellowish, slightly elevated on its lower 
half, strongly narrowed toward the base, about two-thirds 
as wide at the vertex as high. There are three pairs of 
