26 The Ohio Naturalist. [Vol. VII, No. 2, 



than the basal; thorax gray above with a faint yellowish tinge; 

 abdomen black in ground color, except each side of the first 

 three segments which is red, a gray middorsal stripe and on the 

 last three or four segments indications of gray lateral stripes; 

 wings hyaline with the costal cell dilute yellowish; extreme 

 apexes of all the femora, basal part of anterior tibia and all 

 except the extreme apexes of the other tibiae yellow, otherwise 

 legs dark brown or black. 



Female: Length 9-11 mm., front clothed with gray pollen, 

 sides parallel, callosity nearly square, shining and with a line 

 above. 



Male: Length 11 mm., head small with only a few large 

 facets on the disc of each eye. For further statements regarding 

 the male of this species see under conterininus above. 



Habitat: I procured a number of this species at Bay Ridge,, 

 Maryland, by sweeping in grassy areas near water. Others from 

 Durham, N. H.; Suffield, Ct. ; Woods Hole, Mass.; and Anglesia, 

 New Jersey. 



Tabanus quinquevittatus Wiedemann. General -color much 

 as in costalis. Head large; first segment of the antenna some- 

 what enlarged and furnished with short black hairs above, third 

 segment rather wide, basal portion red and with a well defined 

 angle above, annulate portion about as long as the basal; thorax 

 yellowsih-gray ; wing hyaline with a small yellow stigma; front 

 legs black with the exception of the basal parts of the tibiae which 

 are yellow, apexes of femora of the other legs, tibiae and meta- 

 tarsi of the middle legs, and tibiae except apexes, and the 

 metatarsi of the posterior legs yellow, other parts brown. 



Female. Length 13-16 mm., front of normal width, slightly 

 narrowed below, callosity shining black and nearh' square ;. 

 abdomen above with the margin on each side and three stripes 

 yellow, intervals between the yellow dark brown or black. 



Male: Length as in the other sex, head very large, area of 

 enlarged facets extensive, a narrow band of small facets next the 

 occiput above; abdomen somewhat variable: the middorsal stripe 

 well marked and margined with fuscous on either side, remainder 

 usually pale yellowish without well defined markings. 



Habitat: Gulf coast of Louisiana, and Galveston, Texas. 

 Bellardi has it from Mexico. 



Tabanus sagax Osten Sacken. This appears to be the least 

 common of the species here treated. The legs are red throughout 

 with the feet slightly darker than the other parts; the thorax is 

 dark, thinly clothed with grayish pollen; abdomen with a dis- 

 tinct middorsal gray stripe and a row of spots on each side, a 

 pair to each segment; wings hyaline, costal cell dilute yellowish. 

 Length 13-16 mm. Known from Illinois, Minnesota and New 

 Jersey. 



