Dec, 1907.] New North American Tabanidae. 225 



This species is something Hke T. abdominahs 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, thii'd 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 larown 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. 



