106 PROCEEDINGS OF THE NATIONAL MUSEUM vol. 93 



shining black, pollen arranged as in curriei, more noticeable at base and 

 sides of segments ; dorsal abdominal hairs erect ; third segment with 

 four discal macrochaetae in a row. 



Female (allotype). — Front at narrowest 0.35 head width; length of 

 third segment of antenna three and one-fourth times that of second ; 

 facial ridge bristly on lowest one-third ; sternopleurals three plus an 

 additional weak one on one side ; mid tibia with three median antero- 

 lateral bristles. Dorsal abdominal hairs depressed ; four discal macro- 

 chaetae on third segment not in a row; fourth segment polished 

 black; otherwise description same as for male. 



Paratypes (one male and one female). — This material varies as 

 follows from the type and allotype notations : Front at narrowest in 

 male 0.39, in female 0.37 head width ; facial ridge of male bristly one- 

 half, of female two-fifths; arista of male thickened on basal fourth. 

 Sternopleurals three; midtibia of male with three and of female 

 with four median bristles on anterolateral side, female with two 

 inner ventral bristles; female with four discal macrochaetae on third 

 segment in a row; abdomen of male noted as having exceptionally 

 thin pollen. 



Type and allotype locality. — Juliaetta, Idaho. 



Type.— Male, U.S.N.M. No. 54141. 



Host. — Unknown. 



Remarks. — Three males and three females collected by Aldrich, 

 including the type and allotype, Juliaetta, Idaho ; including also one 

 male and one female paratype, Lawyers Canyon, Idaho, on July 16, 

 1909; one male, Moscow, Idaho, July 8, 1916; and one female, Sweet- 

 water, Idaho, June 17, 1930. 



7. CHRYSOPHRYXE, new genus 



The genus Ghrysophryxe should be associated with the genera 

 Thelymyia and Phiyxe. The genus has many of the characteristics 

 of Phryxe, namely, apical scutellars erect or proclinate, decussate; 

 four postsutural dorsocentral macrochaetae; male without frontal- 

 orbital bristles. Chrysophrj/xe, however, is predominantly golden 

 pollinose with yellow palpi and a pair of true discal macrochaetae 

 on the second and third abdominal segments. 



1. CHRYSOPHRYXE TIBIALIS, new species, genotype 



Chrysoexorista viridis Townsend (partim), Proc\ U. S. Nat. Mus., vol. 49, p. 435, 

 1915. 



Male (type). — Head with front at narrowest 0.36 head width; 

 frontal row of six bristles, extending from on a level with below 

 arista to two reclinate preverticals ; vertical and weak outer vertical 

 bristle; facial ridge bristly on lowest one-fifth; gena one-fifth eye 



