OF THE TABANID^ OF THE UNITED STATES. 391 



C. areolatus a specimen which had the centres of the cells on the disc of a faded brown, as 

 is often the case, without constituting a specific character. In the description of the abdo- 

 men some omission has occurred, Avliich renders it incomprehensible. 



20. Chrysops striatus n. sp. 



f Chrysops furcatus Walker, List, etc., i, p. 199. 



Chnjsops vittatus BollarJi (nee Wiedein.) Snggio, etc., i, p. 74. 



9 . The hyaline triangle separating the crossband from the apical spot docs not reach the second longitudi- 

 nal vein; first basal cell to a considerable extent infuscated, the second altogether hyaline; frontal tubercle 

 black, scutellnm blackish at base, reddish at tip ; abdomen yellow, with lour longitudinal black stripes. 



Length, 7-9 mm. 



Female. "Very like that of C vittatus in its general appearance and in the coloring of 

 its wings. It differs however in the following points : the face is ferruginous, but the facial 

 callosities are usually brownish ; the frontal callosity is black and the pollen on the front 

 greenish-gray ; the coloring of the thorax is less yellow, the median stripe being greenish- 

 gray, with a brown line in the middle ; the scutellum is more or less blackish at the base, 

 the posterior half only being reddish ; the longitudinal tripes on the abdomen are darker 

 and better marked, esjiecially on the first two segment , where, in C. vittatus, they are 

 very often somewhat faded ; the fifth posterior cell is usually hyaline, and not invaded by a 

 brown cloud, issuing from the crossband ; the latter is limited posteriorly by the intercalary 

 vein; the apical spot is smaller, occupying only the anterior portion of the second sub- 

 marginal cell ; the brown at the base of the second basal cell is confined to a small spot. 

 Venter yellow, with a broad median brown stripe, attenuated anteriorly, and two narrow 

 lateral stripes. 



Ilab. District of Columbia ; Illinois. Six females. 



I have two doubtful specimens from Illinois (Le Baron), with the thorax and wings of O. 

 striatus, but with reddish facial and frontal tubercles. 



Mr. Walker's description of C. furcatus seems to fit the present species better than any 

 other ; nevertheless, important discrepancies in the description prevent me from admitting 

 the synonymy. Bellardi's C. vittatus is very likely this species, and certainly not C vitta- 

 tus Wied. (compare the color of scutellum and of the frontal tubercle). 



21. Chrysops hilaris n. sp. 



$ . Apical spot separated from the crossband by the tip of the hyaline triangle, which reaches the costa ; 

 both basal cells hyaline ; the crossband does not quite reach the hind margin. Frontal and facial callosities 

 black; third and fourth abdominal segments with four black hmgitudinal spots, altermting with yellow ones, 

 sometimes coalescing in such a way as to leave but a yellow longitudinal stripe and lateral yellow spots. 



Length, 8-9 mm. 



Female. Face yellowish-ferruginous, facial callosities black ; palpi reddish-yellow ; front, 

 antennoe and thorax as in the preceding species. Abdomen : first two segments yellow ; the 

 first with two black, rounded spots, separated by a yellow space, under the scutellum ; the 

 second with two short, diverging black streaks in the middle, which neither meet nor touch 

 the anterior margin j the posterior margin they sometimes touch, sometimes not ; the third 



