March, 1915.] ToWNSEND: New MasICERATID^ AND DeXIID.E. 61 



NEW MASICERATID^ AND DEXIID^ FROM 

 SOUTH AMERICA. 



By Charles H. T. Tovvnsend, 



Washington, D. C. 



The following forms, except the last, were collected by the writer 

 in Peru : 



Family MASICERATID^. 



Subfamily CYLINDROMASICERATINyE. 

 CYLINDROMASICERA new genus. 



Intermediate in external adult characters between Masicera, Sisy- 

 ropa and Eiimasiccra, with a strong approach to Metopiops in habitus 

 and general characters. Description is from female only. Front and 

 face of female of nearly equal width throughout, about as wide as 

 one eye, the eyes descending exactly as low as vibrissae. Cheeks very 

 narrow, about as wide as length of the short second antennal joint. 

 Parafacials very narrowed below and running into the linear orbit, 

 gradually widening above, bare. Parafrontals three times as wide as 

 the narrow frontalia, with sparse fine hairs. Ocellar bristles absent. 

 Two inner reclinate and two outer proclinate orbital bristles on each 

 side. Frontal bristles decussate except the two front pairs, reaching 

 from near ocelli to end of second antennal joint. Facialia strongly 

 ciliate to well short of lowest frontal bristle, on nearly two thirds their 

 extent, the cilia not as long as frontal bristles. Antennae very long 

 but not quite reaching oral margin, latter slightly prominent and 

 vibrissae practically on same. Arista thickened on basal third or so, 

 microscopically short-pubescent. Eyes practically naked, only the 

 most microscopic short sparse hairs faintly visible with the 28 magni- 

 fication of Zeiss binocular in most favorable view. Third antennal 

 joint about four times as long as second. Proboscis very short and 

 fleshy, palpi widened apically. Length of head at vibrissa about one- 

 half that at base of antennae, the latter inserted above eye-middle. 



Two sternopleural and three postsutural bristles. Two strong lat« 

 eral pairs of scutellar bristles, and a bristle between them on each sida 



