I 



ART. 23 FLIES OF THE FAMILY SAPROMYZIDAE — MALLOCH 7 



ASILOSTOMA FLAVIFACIES, new species 



FemaIe.~B.ead as in preceding species but the face and cheeks are 

 honey yellow. The thorax is colored as in atriceps but the anterior 

 margin is more yellowish and vittate, and the sternopleura is yellow, 

 not dark, and the dark mark on sides of metathorax is deeper black. 

 Abdomen shining fuscous. Wings with but faint indications of the 

 cloud on fifth vein and outer cross veins, none on apices of other 

 veins. 



Structurally similar to atriceps. 



Length, 3 mm. 



Type and one defective paratype, Higuito, San Mateo, Costa Rica 

 (P. Schild.). 



Type.— Cat No. 40955, U.S.N.M. 



Genus BLEPHAROLAUXANIA Hendel 



This genus has the base of third vein setulose to beyond the inner 

 cross vein, the face convex below, and two pairs of normal back- 

 wardly inclined orbitals. The most striking character of the genus 

 is the presence of fine hairs on the upper surface of the third antennal 

 segment which are as long as, or longer than, the width of the seg- 

 ment itself. There is no other genus except the next following one 

 so far described in which such hairs occur. 



BLEPHAROLAUXANIA TRICHOCERA Hendel 



This is the only known species of the genus, and occurs in Peru. 

 It is a yellow species, with the wing veins mostly browned. The 

 arista is very long haired and the thorax has three pairs of postsutu- 

 ral dorsocentrals. 



I have not seen the species. 



Genus PLATYGRAPHIU3I Hendel 



This genus lacks the presutural (posthumeral) bristle, has the third 

 antennal segment three times as long as wide, and long haired on 

 upper surface as in the preceding genus. It differs from that genus 

 in having no presutural bristle, the third wing vein without bristles, 

 and the arista with the hairs about half as long as width of third 

 antennal segment. PUfygraphium pemcillatum Hendel is the only 

 known species, and it is recorded only from Bolivia. It is yellow in 

 color, with the abdomen browned, and has the wings grayish hyaline, 

 with the base and costa yelloAvish. It is unknown to me. 



Genus ERIURGUS Hendel 



This genus lacks the presutural bristle, has the wing veins without 

 bristles, and the third antennal segment orbicular and without hail's 



