]S^EW MUSCOID FLIES HALL 205 



discal bristles not definitely arranged in pairs; fourth segment with 

 numerous scattered discal bristles; hypopygium (fig. 20, h and c) 

 small, black, almost concealed. 



Wing hyaline; epaulet black; costal spine absent; third costal 

 section equal to fifth in length; third vein with two or three basal 

 setulae both above and below; apical cell open; fourth vein ending 

 slightly before wing apex and with a distinct angulated bend; squama 

 infuscated, yellowish or orange white, darker on rim. 



Legs black; anterior femur with complete dorsal, posterior dorsal, 

 and posterior ventral rows of bristles and posteriorly with long 

 scattered setalike hairs which are not in rows; anterior tibia with a 

 staggered dorsal row of bristles, and with two posterior bristles on 

 the apical third; claw and pulvilla fully one and one-half times as 

 long as apical tarsal segment; middle femur with staggered anterior 

 basal bristles which are not in rows, a row of anterior ventral bristles 

 on the apical third, three long bristles on the anterior ventral basal 

 third, a complete posterior ventral row of bristles which are longest 

 basally, the apical posterior with a series of bristles; middle tibia 

 with one ventral bristle near middle, one elongate bristle on the 

 anterior ventral surface near middle, two posterior dorsal bristles, 

 the first near middle and the second near apical fourth; hind coxa 

 bare behind; hind femur with three or four long basal posterior 

 ventral bristles, anteroventrally with two long bristles basally and 

 two long bristles apically, a complete anterior dorsal row, a basal 

 anterior row; hind tibia with a row of posterior dorsal bristles, the 

 two at middle of row longer and stronger, a series of three anterior 

 ventral bristles near the apical third, and a complete row of anterior 

 dorsal bristles which may be considered ciliate, the row with one 

 or two longer and stronger bristles near middle. 



Female. — Front approximately 0.31 of head width; outer orbital 

 bristles two, proclinate ; thorax more heavily pollinose than in male ; 

 abdomen with the terminal segment closing slitlike below and with 

 the lateral margins heavily setose ; legs as in male. 



Type locality. — Hokkaido, Japan. 



Type and paratypes. — U.S.N.M. no. 51693. 



Host. — Nematus e7'ichsoni Hartig. 



Remarks. — Described from a type (male) and a series of 119 male 

 and female paratype specimens reared as a parasite of the larch 

 sawfly by Shizuai during the spring of 1936. 



Genus MYOCERA Robineau-Desvoidy 



1830. Mijocera Robineau-Desvoidy, Essai sur les Myodaires, Mem. Pres. Acad. 



France, vol. 2, p. 328. 

 1863. Myocera Robineau-Desvoidy, Histoire uaturelle des dipteres des environs 



de Paris, vol. 2, pp. 892-393. 



