Dec, 1907.] New North American Tabanidae. 229 



black, legs black, wings with costal and first basal cells, cross- 

 Ijand and apical spot black, otherwise hyaline. The crossband 

 hardly reaches the posterior margin but comes nearest to it in 

 the fourth posterior cell; the apical spot fills out nearlv half of 

 the second submarginal cell and is entirely separated from the 

 crossband. Abdomen entirely black above and below. 



Female from Raleigh, North Carolina, collected by C. S. 

 Brimley, April IS, 1906. Entirely distinct from the species of 

 Nearctic Chyrsops known to me. 



Chrysops dorsovittatus n. sp. Length 7 millimeters. Ground 

 color of the face black, undenuded parts covered with yellow 

 dust, apical spot of the wing narrowly separated from the cross- 

 band. Abdomen with a wide middorsal black stripe, and black 

 apex. 



Female. Facial and frontal callosities and vertex shining 

 black, cheeks, middle of the face, region surrounding the antennae 

 and middle and sides of the front covered with golden yellow 

 dust; palpi and proboscis black; first segment of the antenna 

 yellowish, slender and slightly longer than the second; second 

 and third segments more or less infuscated, third as long as the 

 other two. Thorax black, striped with bright yellow, wing 

 with costal and first basal cells, crossband and apical spot black, 

 apical spot very narrowly separated from the crossband which, 

 reaches the posterior border, filling out the fourth posterior call. 

 Legs largely black, anterior coxae, bases of anterior and middle 

 tibiae and all the metatarsi yellow. Abdomen above with the 

 sides of the first segment yellow; wide dorsal stripe and apex 

 black; a narrow extension of the apical black projects forward 

 outside of a yellow space, on each side, to the posterior margin 

 of the second segment. 



Male. Colored like the female except that the fifth vein of the 

 wing is widely margined with black, which at the base of the 

 second basal cell occupies the entire width of this cell. 



A female from Georgia and a male from Florida. The species 

 is entirely distinct from other Nearctic species of Chrysops known 

 to me. 



Chrysops shermani n. sp. Length 9 to 10 millimeters. Thorax 

 black with bright yellow stripes. Black coloring of the wings 

 somewhat broken up by lighter areas along the margins of the 

 veins. Crossband not reaching the posterior margin of the wing. 



Female. Facial and frontal callosities shining yellow, the 

 latter margined with black above, region around the ocelli 

 black; palpi yelk)W, half as long as the proboscis which is black. 

 Thorax black with bright yellow stripes, wing with costal margin, 

 corssband and apical spot black or dark brown; the coloring of 

 the costal and first basal cells is not intense, stigma dark and a 

 few small areas beneath it darker than the other parts. To 



