OF THE TABANIDJ5 OF THE UNITED STATES. 387 



16. C'hi-ysop.s univlttatus. 



Chnjsops icniviltatiis M.icqiiart, Dipt. Exot.. 5" Sup])!., p. .30. 

 ? C/iri/sops fascipennis Macqiiart, Ilisl. Nat. Dipt., i, p. 210. 



$ . The liy.aline interval between tlie crossband and the ajiicnl spot docs not roacli the second longitudin.al 

 vein; first basal cell altogether infascated, the second almost hyaline; apical spot large, invading the first 

 posterior cell; a broad yellow longitndin.al .stripe in the middle of the abdomen, enclosed between two brown 

 stripes; tip of the scutellum more or less reddish. 

 Length 0-7 mm. 

 S . A considerable portion of the second basal cell is infiiscatcd. 



Female. Face ferruginous, facial callosities often Ijrownish ; frontal callo.'^ity large, Ijlack. 

 Antennna : basal joints and base of the third joint reddish, the remainder black. Thorax 

 with the usual stripes; the median stripe greenish-gray, divided l)y a brown longitudinal 

 line ; the lateral ones yellow. Scutellum blackish at base, reddish at tip, the extent of 

 both colors being variable. Abdomen yellow ; a broad yellow stripe extends from the 

 base nearly to the tip ; it is bounded on l:)oth sides by brown stripes, which usually become 

 much broader on the third and following segments ; the tip of the al^domen is altogether 

 brown ; venter yellow, with a broad brown middle stripe, attenuated anteriorly, and narrow 

 lateral brown lines. Legs reddish ; latter half of front tibiti? and the front tarsi black ; tips 

 of the other tarsi Ijrownish. Wings : costal and first basal cells l)rown ; crossljand limited 

 posteriorly by the intercalary vein and fdling out the fourth posterior cell ; apical spot 

 large, reaching the second posterior cell and separated from the crossband Ijy an elongated 

 hyaline space, very irregidar and jagged on its distal side, and having its apex innnediately 

 above the proximal end of the second submarginal cell ; there is a distinct brown cloud at 

 the distal end of the anal cell, on the margin of the wing; fifth posterior cell usually hy- 

 aline; second basal cell with a brown streak on its proximal half. 



Ilab. District Columbia, Maryland, New Jersey, Connecticut, Kentucky (F. G. Sanborn). 

 Eleven females. 



A male, apparently belonging to this species (Tarrytown, N. Y., in June), has all the 

 characters of the female, except that the thorax is more brownish and hairy ; the brown 

 stripes on the abdomen are not expanded posteriori}' ; and the brown color in the second 

 basal cell is more extensive. The identity of this species with ]\Iacquart's C univlttatus 

 can hardly be called in doubt. 



C.fascijjeiinis Macq., Hist. Nat. Dipt., i, p. 21G, is certainly one of the common species 

 of the genus, but the shortness of the description renders the identification impossible. As 

 far as it goes, the description reminds one of C. unhjlttatus Macq., more than of any other 

 species, especially if we take into account the statement about the small size of the species 

 (3|- 1 ). Macquart has, more than once, described his own species a second time. 



17. Chrysops moechus n. sp. 



S. Apical spot altogctlior coalescent with the crossband, the hyaline triangle between them being small, 

 included witliin llie third and (ourth jiosterior cells; abdomen yellow, with more or less broad brown stripes; 

 scutelluin more or less yellowish. 



,;' . Body altogetjier bhiclc, tiiorax with greenish-yellow lateral and pleural stripes; wings altogether 



