286 Professor Williston 07i the 



the root of the wings. Metauotum brown, yellowish on the sides. 

 Abdomen dark brown, the forceps reddish. Halteres with a 

 brown knob. Legs brown, the base of the femora yellowish. 

 Wings nearly uniformly clouded with blackish, the stigma darker ; 

 termination of the auxiliary vein nearly opposite the proximal 

 end of the submarginal cell. 



One specimen. 1000 feet. Iq this specimen the 

 anterior cross-vein is situated nearly opposite the middle 

 of the disjal cell. 



2. Rkipidia iini'pediiiata, n. sp. (PI. IX. _, fig. 55, antenna.) 



$ . Brown spots along the anterior border of the wing; antenny3 

 long-unipectinate ; halteres brown ; thorax with a brown stripe and 

 a lateral brown spot. Length 5 mm. 



Rostrum, palpi and antennae black, Flagellum of antennae, 

 except the terminal joints, unipectinate, the pectinations beginning 

 Avith the first joint and increasing in length to the seventh. Thorax 

 yellow ; the dorsum with a median brow^n stripe, and, on 

 ■either side behind, a rounded yellow spot, leaving a yellow space 

 between them ; these brown spots are continued on the scutellum, 

 enclosing a small yellow spot, Pleuras with a sLmder, longitudinal 

 brown stripe. Halteres brown. Metanotum brown. Abdomen, 

 brown, the venter yellowish. Legs V)rown, the femora lighter 

 coloured toward the base ; second, third, and fourth joints of the 

 hind tarsi light yellowish. Wings with a blackish tinge, with 

 inconspicuous darker clouds along the anterior margin and on the 

 cross-veins ; before and beyond the dark-brown stigma, a rounded, 

 more hyaline spot ; apical portion of the costa more distinctly 

 clouded ; insertion of the auxiliary vein a little beyond the middle 

 of the prefurca. 



One specimen. 1000 feet. 



3. Rhipidia costalis, u. sp. (PI, IX. ^ fig. 56^ antenna.) 



$ . Antennae bipectinate ; thorax not striped ; costa with 

 brown spots or clouds. Length 5 mm. 



Palpi, rostrum and. antennae black, the latter bipectinate, but 

 the pectinations shorter and more slender than in It. hipecUnata . 

 Thorax brownish-yellow, the mesonotum opaque yellowish-red, 

 with a spot in front, and two behind the suture, faintly brownish. 

 Knob of halteres brownish. Abdomen reddish, with brown 

 posterior borders to the segments ; forceps red. Legs brown ; the 



