Dec, I9I2.] Alexander: Revision of Brachypremna. 229 



thence continuing straight to the suture, the pale median line enclosed by them 

 very narrow; sides of the sclerite dark brown, with an elongate, triangular, 

 white mark, beginning on the lateral end of the suture before the wing-base, 

 running inward ; scutum light brown with three dark brown stripes, the median 

 one broader; scutellum brown on the sides, in the middle silvery-white with an 

 elongate brown median vitta ; postnotum silvery-white, tri-vittate with dark 

 brown, the pale stripes a trifle narrower than the dark median stripe. Pleurae 

 dull silvery-white, less clear anteriorly, with narrow dark brown stripes, the 

 most dorsal of which begins at the praescutal pseudosutures (humeral pits"), runs 

 very obliquely under the bases of the wings and halteres and ends in the abdom- 

 inal sternites ; the second stripe is interrupted and includes the outer face of 

 most of the coxae. Halteres: knob brown, stem pale. Legs: coxae gray with a 

 distinct brown stripe; trochanter pale; fore and middle femora dark brown; 

 hind femur light brown, darkening to the tip ; tibiae and tarsi entirely pale yel- 

 lowish-white. 



Wings: subhyaline, costal cell light brown or gray; cell R2 with the costal 

 border brown ; tip of cell R^ narrowly brown on the caudal margin ; veins con- 

 spicuously margined with brown ; tips of the median veins and Cmj very pale ; 

 stigma pale brown, margined with blackish-brown. Venation (see Fig. b) : Rg 

 rather long, beyond the arcuation a little longer than A/j+o between cross-veins 

 r-m and m; r-m short, but distinct, basal deflection of Cmj beyond the fork of 

 M ; fusion of Cu^ and Mj rather extensive. 



Abdomen : tergum dark brown with indications of a paler, median, dorsal 

 stripe; sternum very pale, the basal segments with oval dark brown spots in the 

 middle, these fading out caudad into a lighter brown ; in the distal segments, the 

 dark brown spots become much more elongated. Hypopygium, see the generic 

 characterization. 



cJc? (Vienna, Georgia), length, 11. 5-15. 8 mm.; wing, 15. 2-19. 6 mm. Fore 

 leg, femur, 11.8 mm.; tibia, 13.5 mm. Hind leg, femur, 11. 6-15 mm.; tibia, 

 12. 6-17. 2 mm. 



cf (Igarape-Assu, Brazil), length, 13.8 m.m. ; wing, 18.1 mm. Fore leg, 

 femur, 11.6 mm.; tibia, 13 mm. Hind leg, femur, 13.9 mm. ; tibia, 15.5 mm. 



$ (Igarape-Assu, Brazil), length, about 15.8 mm.; wing, 16.8 mm. Fore 

 leg, femur, 11.2 mm.; tibia, 12 mm. Hind leg, femur, 12.8 mm.; tibia, 14. i mm. 



Distribution. — United States: New Jersey, Shark River, Mon- 

 mouth Co. (Johnson) ; District of Columbia, Washington (Osten 

 Sacken) ; North Carolina, Pendleton, Northampton Co. (Johnson) ; 

 Kentucky, in Mus. Comp. Zool. (Johnson) ; Georgia, Atlanta, Felton 

 Co. ; Vienna, Dooly Co., Albany, Dougherty Co., Bainbridge, Decatur 

 Co. (Dr. J. C. Bradley), and Billy's Island, Okeefinokee Swamp, 

 Charleston Co. (Cornell University Exped. 1912) ; Florida, Tick 

 Island, Volusia Co. (Johnson), Jacksonville, Duval Co. (Johnson) ; 

 Texas, Dallas, Dallas Co. (Boll). Mexico: Tabasco, Teapa and 



