NO. 2024. FLIES IN SUBFAMILY BOTANOBIIN.E—MALLOCH. 263 



capax; triangle highly polished; antennae yellow, third joint above, 

 and arista black; face and cheeks pale yellow, the latter white 

 dusted, proboscis black-brown, glossy; palpi yellow. Mesonotum 

 with distinct brownish pollmosity; humeri glossy; plfeurse pollinose 

 on above all coxae, a broad stripe between fore and hind pairs 

 glossy; scutellum colored as disk of mesonotum. Abdomen colored 

 on dorsum as disk of mesonotum, yellowish below. I^egs yellow; 

 mid and hind coxae brownish, apices of all femora browned; tibiae 

 browned, except at bases; all tarsi brown. Wings clear, veins dark 

 brown. Halteres reddish yellow. 



Frons about one-half the width of head; triangle elongate, occu- 

 pying rather more than two-thirds the width of vertex, and ex- 

 tendmg slightly more than two-thirds to anterior margin of frons; 

 surface hairs rather stronger than in capax, not numerous; lateral 

 setulae strong; antennae above the average size; third joint diskUke; 

 artista very distinctly pubescent, length equal to width of frons, 

 for profile see fig. 26. Mesonotum sparsely hah-ed, the hairs rather 

 setulose, and forming three short rows, the center one very short; 

 scutellum with four marginal bristles and a few, weak, discal hahs, 

 outlme of scutellum rounded. Surface of abdomen with rather 

 setulose hairs. Legs slender, elongate, hairy; hmd tibial spur as 

 in fig. 27. Wing is in fig. 28. 



Length, 3-4 mm. 



Type.— C&t. No. 15969, U.S.N.M. 



Type-locality. — Canal Zone, Panama, AprU, 1907 (A. Busck), a 

 large series of specimens. 



The male differs from the female m having the pale color rather 

 more pronounced, in having the cheeks not so high, and the pro- 

 boscis smaller, as well as in its possession of a large knoblike hypo- 

 pygium. 



Genus CERATOBARYS Coquillett. 



Figs. 31, 39. 



Ceratobarys Coquillett, Journ. N. J. Ent. Soc, vol. 6, 1898, p. 45. 



There is but a single species belonging to this genus in North 

 America so far as is known. It is very similar to certain yellow spe- 

 cies in the genus Crassiseta but may be known from them at once by 

 the possession of the hind tibial spur. From all the species in Hip- 

 pelates and Pseudohippelates it may be Imown by the strap-shaped 

 arista as shown in fig. 39. 



I have seen specimens from Georgia; Piano, Texas, June, in oat 

 field (E. S. Tucker); and College Station, Texas, from wheat, Feb- 

 ruary, 1891 (F. M. Webster). 



