572 PROCEEDINGS OF THE NATIONAL MUSEUM. vol.56. 



URODEXODES, new genus. 



Genotype. — Urodexodes charapensis, new species. 



Differs from Paradexodes as follows: Frontal profile about as 

 long as facial. Proboscis about two-thirds head height. Third 

 antennal joint about three times second, equilateral, subtruncate. 

 Four or five frontals below base of antennae. No ocellars. Para- 

 facialia in middle about one-fourth v/idth of clypeus. Normally 

 three postsuturals. No apical scutellars. Cubitus about one- 

 fourth of wing breadth from hind margin. Anal segment of male as 

 long as preceding segment; not caudate but tapered to a pomt, 

 obliquely cut off below on posterior half in profile. Abdomen with 

 short erect bristles in addition to the macrochaetae; only one strong 

 median discal pair on intermediate segments. 



URODEXODES CHARAPENSIS, new species. 



Length, 9 to 10 mm. Two males, Rio Charape, Jaen Province, 

 Peru, 4,500 feet, September 15 and 16, 1911 (C. H. T. Townsend). 



Antennae, palpi and frontalia blackish; rest of head anteriorly 

 quite thickly golden pollinose; the occiput ashy. Thorax and 

 scutellum somewhat paler golden pollinose, former with four black 

 vittae. Abdomen dark brown; last three segments pale golden 

 pollinose, leaving an indistinctly defined and changeable triangular 

 brown area on intermediate segments, and a brown reflection on 

 disk of anal segment. Legs blackish. Wings faintly fuscous cost- 

 ally. Tegulae tawny, more or less glassy. 



Type.— Cut. No. 22229, U.S.N.M. 



PHRYNOLYDELLA, new genus. 



Genotype. — Phrynolydella polita, new species. 



Differs from Lydella as follows: Clypeus twice as long as wide or 

 more. Facialia ciliate about halfway. Antennae inserted well 

 above eye middle; third joint twice to three times second. Male 

 frontalia no wider than one parafrontal in middle; those of female 

 narrower than one parafrontal. Hind crossvein not far from cubitus. 

 Male abdomen truncate posteriorly, not pointed; median discals 

 not doubled. Intermediate segments lacking erect bristles. 



PHRYNOLYDELLA POLITA, new species. 



Length 5.5 to 9 mm. Numerous specimens of both sexes, Pinal 

 Mountains, Chiricahua Mountains, Castle Butte, Arizona, Peloncillo 

 Mountains, New Mexico, Sierra Madre, Chihuahua, 4,750 to 7,300 

 feet. (C. H. T. Townsend); and Williams, Aj-izona, Las Vegas Hot 

 Springs, New Mexico. (H. S. Barber). 



Shining black, thinly silvery pollinose. Face and front silvery, 

 darker in varying lights; the inside of parafrontala very faintly and 



