1946] Tabanidae of Colombia 65 
This species was described from Santa Fe de Bogota, first 
very briefly in 1921 and later (1923) more in detail. We have 
not seen it; but from the descriptions it appears to be extremely 
close to, or possibly even identical with the genotype, S. alti- 
vagus Ad. Lutz. We have seen two females of S. altivagus, from 
Brazil. The genus appears to be close to Selasoma, though 
readily separated by the characters given in the key. It differs 
from Stibasoma , which it resembles superficially, in the short 
antennal tooth. 5. lutzi was omitted from Krober’s Catalogue 
of Neotropical Tabanidae (1934). 
47. Selasoma tibiale (Fabricius). Synonym: Tab arms tibialis 
Fabricius, 1805. 
Meta: Villavicencio (M. Bates. — Determined by G. Fair- 
child). — Not seen by us from Colombia. 
*48. Bolbodimyia bicolor Bigot, 1892. Synonym: Atylotus ery- 
throcephalus Bigot, 1892. 
Boyaca: Muzo (J. Bequaert). — Meta: Restrepo (J. Be- 
quaert); Retiro near Villavicencio (E. Osorno); Villavicencio 
(M. Bates. — Determined by G. Fairchild). 
This species is extremely variable in color in the same local- 
ity. It may be completely black, with a black beard and black 
hairs on the pleura; or have the under side of the body, the 
entire head, most of the antennae and tibiae reddish, the beard 
and hairs on the pleura being also bright red. Some specimens 
are intermediate between these two extremes. 
Dichelacera Macquart 
We follow G. Fairchild (1943a) in subordinating Catachlo- 
rops and Psalidia as subgenera to Dichelacera. 
Psalidia Enderlein (1922) has as type, by original designa- 
tion, Tabanus furcatus Wiedemann, 1828. This group was origi- 
nally proposed, as a genus, for Neotropical Tabaninae with a 
long, finger-shaped basal process on the third antennal segment 
and the first posterior cell closed and stalked before the margin 
of the wing. In the more complete diagnosis of 1925, Enderlein 
states that the eyes are bare. The closed or open first posterior 
cell is not a character of generic value in Tabaninae. Only spe- 
cies with the subepaulet bare or with a few macrotrichia only 
should be included. 
