Dec., 1907.] 
New North American Tabanidae. 
225 
This species is something like T. abdominalis but is larger, 
the antennae are different in form and there are several other 
differences. Three female specimens, one taken near New Or¬ 
leans, July 14, and two taken at Le Compte, Louisiana, August 
24, 1906. ' 
Tabanus johnsoni n. sp. Length 20 millimeters. General 
color of the whole body, including the wings, yellowish brown, 
front moderately wide with parallel sides. Form somewhat 
elongate. * 
Front about three fourths of a millimeter in width, frontal 
callosity chestnut colored, nearly as wide as the front, upper cor¬ 
ners rounded, a narrow line above reaching half way to the ver¬ 
tex, antennae concolorous with the body, first segment clothed 
with black hairs, second segment with a few black hairs at the 
apex, third wide at the base, cut out above, thus a distinct tooth 
is formed, basal portion a little longer than the annulate. Palpi 
lighter in color than the antennae, proboscis brown, slightly 
longer than the palpi. Thorax very faintly striped above, legs 
colored like the body with the tarsi slightly darker; wings yellow¬ 
ish brown with small clouds on the margins of the cross veins 
and the furcation of the third vein, first posterior cell closed or 
strongly narrowed. Abdomen yellowish brown with a series of 
lighter colored middorsal triangles which are so long that each 
reaches both borders of its respective segment, thus a longitudinal 
dorsal stripe composed of contiguous triangles is formed. 
Females taken at St. Augustine, Florida, by Charles W. John¬ 
son, for whom it is a pleasure to name the species. 
Tabanus plenus n. sp. Length 11 to 13 millimeters. A thick¬ 
set dark colored species with nearly hyaline wings and a distinctly 
striped thorax. 
Front rather narrow and clothed with gold colored dust, fron¬ 
tal callosity brownish, a little more than half as wide as the front 
below, gradually narrowed above and ending at half the distance 
to the vertex; antennae very light brown with the exception of 
the annulate portion of the third segment which is distinctly 
darker, third antennal segment wide at base with a prominent 
blunt tooth above, basal portion only slightly longer than the 
annulate portion; palpi and proboscis brown, the former some¬ 
what lighter in color than the latter. Thorax dark, nearly black 
in ground color, above with four very prominent gray stripes, 
the middle two of which reach the scutellum; legs black, stigma 
of the wings clear brown, wings slightly tinged with brownish 
which color is very slightly more intense behind the stigma; 
abdomen dark, nearly black, two basal segments thinly clothed 
with gray dust, remaining segments each with a fringe of white 
hairs at the posterior border. 
