SOUTH AMERICAN DIPTERA. 251 



16. Dicranophora afflnis u. sp. 



9 .—Length 8 mm. Chiefly black ; scutellar process not longer than the 

 body of scutellum, the spines long, femoral projections confined to the outer end 

 of the middle pair. Antennse yellow; face nearly white; front black, shining, 

 a slender yellow margin on each side, interrupted near the middle; below the 

 middle a transverse depression. Mesonotum black, not at all shining; two 

 slender stripes,' abbreviated behind, reaching from a spot on the humeri iiud a 

 small spot on the post-alar callosities green. Scutellum green, its process and 

 spines red ; the spiues about as long as the entire scutellum. Pleurse black, a 

 slender vertical strip behind the prothorax, another, broader, near the mesopleu- 

 ral suture running into a large spot on the sternopleurse ; a spot on the side of 

 metanotum, in which there is a tubercular projection, and one below it on the 

 metasternum, green. Abdomen black; first segment with a subquadrate spot, 

 which has a sharp anterior lateral projection, second segment with a small semi- 

 oval spot behind, the third and fourth with the lateral margin, and the fifth at 

 the tip with an oval spot, green. Coxre pale yellow, femora yellowish red, yel- 

 lowish at base; front tibiaj and tarsi black, hind tibise brownish red, four hind 

 tarsi white, with the last two joints black ; middle femora on the outer half below 

 beveled, and near the middle of the straight beveling with about three small 

 tubercles or teeth. Wings nearly hyaline, veins in front yellowish, stigma small, 

 brownish. 



One specimen, Rio de Janeiro. This species is related to D.fur- 

 cifera Auss. Zw. Ins. ii, 38 (Sargiis'), pi. vii, fig. 5, but diifers in the 

 length of the scutellar process, the markings of front and abdomen, 

 and, according to Macquart, Dipt. Exot. i, 1, 196, the position of 

 the tubercles of the middle femora. 



17. Histiodroina inerinis Wiedemann, Auss. Zw. Ins. ii, 31 (Sargns). pi. 



vii, fig. 7 ; Schiuer, Nov. Exped. 70. 

 One specimen, Rio de Janeiro. The description applies well. 



18. Rhaphiocera armata Wiedemann, Auss. Zw. Ins. i, 1 ; ii, 29 {Sargus) ; 



Macquart, Dipt. Exot. i, 1, pi. xxiv, fig. 2 ; Schiner, Novara Exped. 70. 

 Ten specimens from Chapada. Schiner's remarks apply to these 

 specimens, except of the posterior orbits, which have a spot above 

 as Wiedemann described them ; the spots, however, are variable in 

 size. 



19. Hoplistes liortulauus Wiedemann, Auss. Zw. Ins. ii {Sargus) ; Schiuer, 



Novara Exped. 70. 

 Five specimens, Rio de Janeiro. The genus is very doubtfully 

 distinct from Rhaphiocera. 



20. C/lirysouotus analis n. sp. 



% .—Length 11 mm. Eeddish yellow ; front, tip of abdomen, hind tibiffi and 

 tarsi, deep black. In habitus, Ptecticus-\ike, but the second anteuual joint not 

 prolonged and neuration different. Vertical triangle shining black ; eyes nearly 



