Americana 



VOL. I. 



BROOKLYN, MARCH, 1886. 



NO. 12. 



The North American species of Toxophora. 



By D. W. Coquillett. 



The genus Toxophora may be easily distinguished from any other 

 genus belonging to the family Bombylidce by the following characters: 

 Wings with only three posterior cells; abdomen never club-shaped, cov- 

 ered with an appressed tomentum and destitute of long pile; body and 

 head when viewed from the side curves nearly in the form of a half-circle: 

 first joint of antennae longer than the third. 



The following table comprises all of the species of Toxophora known 

 to occur in North America. 



i. — Wings with three submarginal cells, the second vein being connected with the 

 anterior branch of the third by a cross-vein 2 



Wings with only two submarginal cells; cross-vein at apex of discal cell not 



angular, and destitute of a stump of a vein leucopyga. 



2. — Cross-vein at apex of discal cell angular and bearing a stump of a vein . 3 



Cross-vein at apex of discal cell not angular, destitute of a stump of a vein \ 



3.— Wmgs hyaline, costal half only slightly yellowish pellucida. 



Wings smoky brown, costal half darker brown. ... amphitea. 



4. -— Abdomen with a black stripe each side of the middle virgata. 



Abdomen with a row of black spots each side of the middle maxima. 



T americana Guer. (Icon. Regn. Anim., Insectes, t. 95, f. 1) has 

 never been described; moreover, the figure shows four posterior cells, 

 which would exclude this species from the genus Toxophora. 



T. leucopyga Wied. Auss. Zw. I, 361, 2; Macq. Dipt. Ex. II, 1, 117, t. XIII. 

 1. I; fulra Gray, Griffith's An. Kingd. XV, Ins. 2, 779, t. 126, f. 5; O.-S. Western 

 Diptera 267; Cat. Dipt. 238. Ga.. Car., Tex. Length 10— 12 mm. (O.-S.) 



Unknown to me. Judging from the descriptions there can be no 

 doubt of the correctness of this synonomy, which was suspected by Osten 

 Sacken. 



