Dec., 1906.] North American Species of Tabanus. 
2 3 
rather conspicuous brown stigma and brownish margins to 
some of the longitudinal veins near the apex; fork of the third 
vein with a short appendage; posterior femora wholly red; 
abdomen fuscous with three stripes yellowish-white in color, the 
lateral ones not usually reaching beyond the third segment. 
Female: Length 10-14 mm., head wider than the thorax; 
front slightly narrowed below, clothed with yellow pollen, 
callosity shining nearly black, slightly narrower than the front, 
nearly square with a very narrow, sometimes unconnected, line 
above; face clothed with white pubescense; thorax dark, in well 
preserved specimens with more or less greenish reflecting pollen 
and scattering, short, black hairs. 
Male: Leagth 14 mm., head decidedly broader than the 
thorax with a large area of very large facets; face and breast 
clothed with white pubescense; disc of the thorax with rather 
dense erect, nearly black hairs which are much longer than in 
the other sex. 
The types of the species were taken at Puerto Barrios, 
Guatemala, March 4, 1906, numerous other specimens from 
Gualan and Panzos in Guatemala, Belize in British Honduras 
and Puerto Cortez in Spanish Honduras. 
Tabanus carneus Bellardi. General color reddish; antenna 
red with the annulate portion of the third segment slightly 
darker; wing hyaline, stigma brown, fork of the third vein 
without an appendage; posterior femur entirely red; abdomen 
red, a little darkened at the extreme apex, three yellowish-white 
dorsal stripes, the middle one plainly marked for the whole 
length, but the lateral ones almost obsolete. 
Female: Length 11-13 mm., thorax above reddish, sparsely 
clothed with gray pollen and short dark hairs. 
Male: Length 13 mm., head wider than the thorax, with a 
distinct area of enlarged facets on each eye; thorax above red¬ 
dish, rather densely clothed with erect brown pile and a small 
amount of gray pollen. 
Habitat: Specimens are at hand from Frontera, Mexico and 
from Puerto Barrios, Guatemala. 
Tabanus conterminus Walker. Before describing this species 
it is well, perhaps, to offer an explanation for using this name. 
When the males of the species of the Atlantic coast are brought 
together it is certain that there are two species in what has gone 
under the name of T. nigrovittatus ever since Osten Sacken 
published his Prodrome of a Monograph of the Tabanidae of the 
Eastern United States. Having the males separated I studied 
to locate their females and believe I have succeeded. Walker’s 
description appears to fit the species very well for color and 
exactly for size, so the name is adopted until it can be proven 
just what the proper solution of the matter is. 
