Vol. 32, pp. 207-210 December 31, 1919 



PROCEEDINGS 



OF THE 



BIOLOGICAL SOCIETY OF WASHINGTON 



SOME NEW EASTERN ANTHOMYIIDAE (DIPTERA). 



BY J. R. MALLOCH. 



In this paper I have described four new species of Anthomy- 

 iidae, the types of the first two being deposited in the collection 

 of Boston Natural History Society and those of the other two 

 in the collection of the U. S. Bureau of Biological Survey. A 

 comparison with the most closely related species is given at the 

 end of the descriptions or their most characteristic features are 

 noted, but as these and all of the species recently described by 

 me have been incorporated in synopses which I hope soon to 

 publish their relationships will be fully dealt with later. 



Phaonia rufibasis, sp. n. 



Male. — Black, slightly shining, densely gray pruinescent. Head black, 

 parafacials in front, and cheek in center brown; second antennal joint and 

 base of third, and all of palpi reddish testaceous. Legs reddish testaceous, 

 fore coxae basally, and tarsi slightly infuscated. Thorax quadrivittate; 

 scutellum largely reddish testaceous. Abdomen with a blackish inter- 

 rupted dorso-central vitta and lateral checkerings. Wings clear, cross- 

 veins infuscated. Calyptrae and halteres yellow. 



Eyes with long rather sparse hairs; irons at narrowest part less than the 

 width across posterior ocelli; parafacial narrower than third antennal joint; 

 cheek four times as high as width of parafacial; longest hairs on arista 

 longer than width of third antennal joint. Presutural acrostichals absent; 

 prealar over half as long as the bristle behind it; postsutural dorso-centrals 

 4 ; hypopleura hairy on upper margin in front of spiracle ; sternopleurals 1 :2 ; 

 scutellum bare below and on sides. Abdomen broadly ovate; basal sternite 

 with a few hairs; fifth sternite with a deep wedge-shaped posterior incision. 

 Fore tibia unarmed at middle ; mid femur with 4 or 5 long bristles on basal 

 half of postero-ventral surface; mid tibia with 3 posterior bristles; hind fe- 

 mur with a series of long bristles from near base to apex on antero-ventral 

 surface and one bristle on middle of postero-ventral; hind tibia with 3 or 4 

 antero-ventral and 2 antero-dorsal bristles, the calcar not very long, anterior 

 surface with a series of setulose hairs. Costal thorn short. 



42— Pboc. Biol. Soc. Wash., Vol. 32, 1919. (207) 



