84 
Psyche 
[Vol. 92 
present, vein A, slightly though distinctly sinuate, vein CuA, dis- 
tinctly, recurvedly arcuate, and female cercus one-segmented. The 
character states for veins A, and CuA, are apparently autapomor- 
phic for the tribe, and I personally feel that the second of these is 
most convincing. The one-segmented female cercus may also be 
autapomorphic for the Prosopochrysini, although a similar charac- 
ter state is found in other stratiomyids. Nagatomi (1981) included 
Euparyphus Gerstaecker, Brachycara Thomson, Nemotelus Geof- 
froy, and Oxycera Meigen in the “Prosopochrysinae” primarily 
because they have one-segmented female cerci. 1 believe the place- 
ment of these genera requires further documentation before this can 
be accepted, as all of those genera have vein CuA, virtually straight 
or curved slightly toward the apex of the wing. Based on examina- 
tion of specimens and figures associated with original descriptions, I 
believe the following genera can be placed in the Prosopochrysini 
with some certainty: Acanthasargus White, Hoplistopsis James, 
Melanochroa Roder, Myxosargus Brauer, Nothomyia Loew, Pro- 
sopochrysa De Meijere, and Rhaphiocerina Lindner. Cyphopros- 
opa James (1975: 473, 474, Figs. 1, 2) may also belong here, but 
James’ figure of its wing indicates that vein CuA, is straight. 
Pseudoberis is here synonymized with Nothomyia because P fal- 
lax is so similar to other Brazilian species placed in the genus 
Nothomyia (see below). The genera within the tribe are not well 
defined, and are badly in need of reevaluation at the world level. 
Nothomyia is primarily found in the New World and is separated 
from Myxosargus on the basis of its slender sixth antennal flagello- 
mere, which ranges from elongate conical (as in Fig. 1) to aristate. 
This flagellomere is not slender in Myxosargus. Melanochroa , the 
third New World genus in the tribe, has an aristate antennal flagel- 
lum, but the eyes are dichoptic in males, while they are holoptic in 
Nothomyia. Nothomyia purportedly occurs in the Old World, but 
Prosopochrvsa (another Old World genus in the tribe) is so similar 
that these species (N. bicolor Hollis, Java; N. brevis (Bigot), New 
Caledonia) cannot be considered members of Nothomyia with cer- 
tainty. At present, no apomorphic character state is known which 
may be used to unambiguously define Nothomyia. 
The South American species placed in Nothomyia exhibit more 
variation in the shape of the antennal flagellum than do members of 
the genus occurring elsewhere. The sixth flagellomere ranges from 
rather thickened and style like (as in Fig. 1) to aristate in the five 
