NEW MUSCOID FLIES HALL 215 



Legs black; middle femur with comb; middle tibia with one an- 

 terior dorsal bristle; hind tibia without long hairs. 



Tyye locality. — La Barca, Jalisco, Mexico. 



Tyfe and paratopes. — U.S.N.M. no. 51688. 



RemarJcs. — Described from the holotype male and three paratype 

 male specimens collected in fruit-fly traps on October 3 and 4, 1931:, 

 by Dr. Alfons Dampf , for whom the species is named. 



The species belongs to a large group of sarcophagine flies that are 

 parasitic upon other insects. The group is limited to North America 

 and South America and is usually found most prevalent in plain or 

 grassland country. 



Genus PHAONIA Robineau-Desvoidy 



PHAONIA PUDOA, new species 



Male. — Head with front very narrow, frontal bristles about 12, the 

 rows descending below to about base of antennae; parafrontals and 

 parafacials thinly silvery pollinose, the latter bare; antenna black, 

 third segment hardly twice the length of second ; arista with short 

 plumosity for its full length; vibrissal axis slightly less in length 

 than antennal axis; bucca about one-fifth eye height, black haired, 

 the hair on upper edge of lower margin curved upward; eyes with 

 long sparse tawny hairs ; palpus and proboscis black, ordinary. 



Thorax black with thin gray pollen and with the normal four 

 indistinct black stripes ; propleura and pteropleura bare ; mesopleura 

 with some erect hairs anterior to spiracle; anterior acrostichals two, 

 slight; anterior dorsocentrals two; prescutellars present; postsutural 

 dorsocentrals four; humerals three; sternopleurals three, widely 

 spaced; prealar long; prosternum without setulae; postalar declivity 

 bare; scutellum with two long marginal bristles, the apical pair 

 crossed. 



Abdomen black, silvery pollinose, with a well-defined black mid- 

 dorsal stripe; hypopygium black, rather large; fifth sternite entire. 



Wing hyaline; basicosta black; all veins without setulae; last sec- 

 tion of fourth vein hardly twice length of preceding section, curved 

 slightly posteriorly; calypters clear, rims yellowish orange; halteres 

 orange. 



Legs black; anterior tibia with long apical dorsal bristle; basal 

 tarsal segment with a tuft of longer setae ventrally at base; midtibia 

 with tM^o median posterior bristles; hind tibia with three short me- 

 dian anterior ventral bristles, two median anterior dorsal bristles, 

 and one long posterior bristle. 



Female. — Like the male except for normal sexual differences. 



Type locality. — Coeur d'Alene, Idaho. 



Type and paratypes. — U.S.N.M. no. 51845. 



Host. — Dendroctonus monticolae Hopkins. 



