290 S. AV. WILLISTON, M. D. 



light yellow, opaque, pollinose cross baud, interrupted in the middle by a slender 

 line, that of the fourth segment is gently oblique on each side; second segment 

 about as long as the third, very narrow in front, of nearly full width behind. 

 Legs black; a small ring or spot at the base of the femora; middle tibiae on 

 distal inner third or half with a tuft of yellowish brown hair, continued more 

 yellow and shorter on the metatarsi. Wings nearly hyaline, yellowish and 

 brownish clouded in front; the stigma and a narrow cloud on the distal section 

 of the third vein brown. 



One specimen, Chapada. This is the handsomest species of the 

 genus that I have yet seen. 



Dedicated to the well-known dipterologist, Mr. Victor von Roeder, 

 of Hoym, Germany. 



92. C'eria barbipes Loew. 



% 9 ■ — Length 14 ram. In structure like C. Roederii. the style less elongate. 

 Black, the thorax and abdomen without markings, except that the base of the 

 second segment is reddish. Face with two inconspicuous yellowish or reddish 

 stripes converging to the oral margin. Wings dark brown in front, lighter 

 toward the tip. Abdomen with fine whitish, close-lying pubescence. Middle 

 tihijB of the male with a brush of long yellowish brown hair on the distal half, 

 continued somewhat on the metatarsi. 



One male and two female specimens from Chapada (November) 

 agree well with Loew's description. The female middle tibiae have 

 no brush of hair at the end. 



93. Ceria Wiilpii n, sp. 



% 9 ■ — Length 12 — 14 mm. Black, scarcely shining. Face and front shining, 

 the former lightly dusted below the antennae, and with four slender or luteous 

 stripes, the one each side from near the middle, gently converging to the oral 

 margin, the other, from the lower border of the eye to the oral margin. Frontal 

 process black, or reddish black, less than half the length nf the first antennal 

 joint. Antennae black, the third joint dark brownish red; second joint dis- 

 tinctly shorter than the first, and a little (perhaps a fourth) longer than the third ; 

 style moderately elongate. Thorax deep black, not shining; a slender, trans- 

 verse, yellow stripe on the sides of the metanotum, and the narrow base and 

 margin of the scutellum. Abdomen deep black, not shining; second segment 

 yellow at the narrow base, the following segments with fine yellow pubescence ; 

 second segment nearly the full width of abdomen behind, distinctly longer than 

 the third. Legs black, the tibife and tarsi sometimes perceptibly reddish. Wings 

 nearly hyaline on the posterior part, along anterior part on basal half deep brown, 

 on di.stal part yellow, on basal posterior portion strongly tinged with brownish. 



One male and six female specimens, Chapada (January, Novem- 

 ber) and Rio de Janeiro (November). The female of this species 

 will be distinguished from the female of barbipes by the additional 

 stripe of the face, the yellow of the distal anterior portion of the 



