1914] Alexander—New or Little-known Neotropical Hexatomini 43 
fore leg with basal quarter of femur conspicuously yellow, abruptly darkening to 
brownish-black; tibize and tarsi dark brownish black; middle and hind legs uni- 
formly very dark brown. Wings almost uniformly brown; cells C and Se a little 
darker colored. Venation: Sc long, Sc: much longer and more distinct than Sco; 
R2+3 rather long, a little longer than R2 beyond cross vein r and about three times 
as long as R:z between the fork of R2+3; and r. 
Abdominal tergum, segments 1-4, orange-yellow; 5, extreme base orange-yellow; 
remainder of 5th and 6 and 7, deep velvety-black; genital segment orange. Ster- 
num similarly colored but duller. 
Holotype, @. Sierra Madre, Chihuahua, Mexico. Hd. R. Piedras Verdes. 
Alt. about 7,300 ft. (Coll. C. H. T. Townsend.) Type in U. S. Nat. Mus. Coll. 
This species is closest to zonata O. S. but I cannot make the 
two descriptions agree. The basal segments of the antennz in 
townsendi are very dark brown; there is more black on the abdo- 
men; the legs are not yellow (except base of fore femora) but 
dark brown. The peculiar course of Sc; in zonata, apparently 
ending in radius rather than in costa does not obtain in the new 
species, where Sc; ends in costa, Sc; being about twice as long as 
Sc. 
Eriocera erythrza Osten Sacken. 
1886. Eriocera erythrea Osten Sacken; Biol. Cent. Amer.; Dipt. vol. I, p. 11, 
One 2 from Cacao, Alta Vera Paz. April 12, 1906. (Schwarz 
and Barber). 
The mesonotal preescutum shows indications of darker brownish stripes of which 
the median is more double. Venation: Sc long, Sc: strong, ending about opposite 
the fork of R2+s; Se: weak, much shorter than Se:. Rs almost in a line with Rex 33 
R. before cross-vein 7 a little less than one-half of R»+3; cross-vein 7 a little more than 
one-half of R: before it; basal deflection of Cu: under the middle of cell 1st M:. 
The specimen is in the U. S. Nat. Mus. Coll. 
Eriocera gracilis Osten Sacken. 
1886. Eriocera gracilis Osten Sacken; Biol. Cent. Amer.; Dipt. vol. I, p. 12. 
One o’, Sierra Madre, Chihuahua, Mexico. Hacienda R. 
Piedras Verdes. Alt. about 7,300 ft. Coll. C. H. T. Townsend. 
Specimen in U.S. Nat. Mus. Coll. 
The mesonotal prescutal greyish on dorsum, with three black stripes cf which 
the median one is broadest in front, narrowed to a point near the suture; the lateral 
stripes which lie on the sides of the dorsal triangle are connected on the anterior 
margin of the sclerite with the median stripe; the sides of the preescutum are more 
yellowish than the grey dorsal triangle; scutum and scutellum, as well as the 
postnotum deep, rich brown. Venation: Sc rather short, ending far before the 
