422 PROCEEDINGS OF THE NATIONAL MUSEUM. vol.49. 



HYPOCHAETOPSIS, new genus. 



Genotype. — Hypochaetopsis cTiaetosa, new species. 



Belongs with HypocJiaeta and Parahypochaeta, differing from latter 

 as follows: First vein bare. Apical cell widely open, ending almost 

 in wingtip, only slightly before. Costal spine rather short. Cheeks 

 of female hardly one-fourth eye-height. Third antennal joint of 

 female only three times as long as second. Face very receding, cheeks 

 extremely short. Frontal bristles very long and heavy, very strongly 

 decussate. Ocellar bristles widely divaricate, distinctly reclinate. 

 Outer verticals absent in female. Parafacials very narrow. Occiput 

 swollen below. The inner of the two lateral scutellar bristles is very 

 much longer than both the outer one and the strongly decussate 

 apical pair. Abdominal macrochaetae very long, strong, suberect, 

 discal and marginal on segments two to four. All the tarsi elongate, 

 the front pair in female still more elongate than the others; tarsal 

 joints much constricted basally, giving tarei a strongly notched or 

 very coarsely pectinate profile, especially marked in the modified 

 front tarsi of female. Claws short in female. 



HYPOCHAETOPSIS CHAETOSA, new species. 



Length of body, 6 mm, ; of wing, 5 mm. One female, Huariaca, 

 Peru, high montanya of the Rio Huallaga canyon, about 10,750 feet, 

 on foliage, December 21, 1913 (Townsend). 



Entire head, thorax, and abdomen cinereous pollinose with a faint 

 brassy tinge, even covering the frontalia. Antennae blackish, palpi 

 fulvous to pale rufous. Four dusky vittae on mesoscutum, the inner 

 pair sublinear and shorter than the outer, which are interrupted. 

 Legs blackish, femora faintly pollinose, tibiae rufous except at base. 

 Abdomen faintly marmorate. Wings very dilute yellowish-fuscous, 

 tho smoky tinge not quite uniform. Tegulae faintly yellowish- 

 smoky, front scale limpid whitish. 



Holotype.—Csit. No. 19443, U.S.N.M. TD 4220. 



CHAETOPHLEPSIS, new genus. 



Genotype. — CJiaetophlepsis tarsalis, new species. 



Differs from Hypochaeta as follows: Geno-orbital bristle low, 

 crowded into margin of the hairy occipital area of cheeks, a second 

 similar bristle just below it and approximated to it. Cheeks only 

 about one-fifth eye-height. Face very receding. Third antennal 

 joint only four times as long as second, small, narrow, equilateral. 

 Arista thickened on basal third. No outer vertical bristle in female. 

 Female front equilateral, about as wide as one eye. Eyes rather 

 indistinctly short-hairy. Parafacials very narrow below, hardly 



