NEW MUSCOID FUES FROM THE ANDEAN MONTANYA 157 



scales of tegulae approaching a golden-fuscous shade, the front scale 

 more nearly shade of wing-bases, while hind sccJe approximates the 

 shade of abdomen. 



Type, the Ecuadorian specimen. 



Xanthoepalpus, new genus. 



This genus is erected for Epalpus hipartitus v. d. Wulp. Mr. J. 

 Bischof, in Zool.-bot. Ges. Wien, vol. LIV, pp. 89-94, has treated 

 what he terms the " Epalpus-Arten der Gruppe bipartitus v. d. Wulp," 

 His group, however, as might be expected from its being founded solely 

 on colorational similarity, is not a natural one. It includes thirteen species 

 all having a color plan similar in genereJ effect to that of the North 

 American Epalpus bicolor Will. The present genus includes only a few 

 of these species, probably taking in bicolor Will., flavoscutellatus Bisch., 

 and semiflavus Bisch., besides the species described below. 



Both the scutellum and abdomen have spinelike macrochaetae ; almost 

 always four postsutural bristles present, but sometimes only three ; either 

 three or four postacrostichal bristles; usually three preacrostichal, but 

 sometimes only two ; usually three but sometimes four presutura! bristles, 

 Discal abdominal macrochaetae are present at least on second segment. 

 Three or four sternopleural bristles. 



Reproductive habit, probably leaf-larviposition of colored maggots. 



Type, Epalpus bipartitus v. d. Wulp. 



Note. — I am aware that Mr. E. E. Austen has stated bipartitus to be 

 the same as bicolor (Ann. Mag. N. H., ser. 7, vol. XIX, first footnote 

 to p. 327), but I doubt this synonymy. 



Xanthoepalpus gabanus, new species. 



Length of body, 1 4,5 mm. ; of wing, 1 2 mm. One male, Casahuiri, 

 about 4,500 feet, February 14, 1910, on flowers of Mikania sp. 



Differs from X. bipartitus as follows : First two antennal joints and 

 whole of legs reddish or light brownish-red. Pile of parafacials is black- 

 ish, but it may appear grayish below. Second aristal joint well elongated. 

 First abdominal segment with macrochaetae on sides and ventral plate ; 

 second segment v^ith a front marginal row of about ten connected by a 

 few discal with the longer row of hind margin ; third segment with a 

 few discal. Four postsutural bristles and four postacrostichal ; three pre- 

 sutureil and three preacrostichal. 



The first three abdominal segments above and below are wholly light 



