ZENILLIA AND ALLIED GENERA — SELLERS 97 



tibiae reddish in male, yellowish in female; hind tibia ciliate; pulvilli 

 longer in male; wing grayish hyaline with a brownish tinge, third 

 vein with two to three bristles at base. 



Abdomen black, gray-pollinose ; side of segments 1 and 2 in male 

 reddish; venter and sides of female abdomen yellow, dorsum of first 

 segment partly yellow ; segments 2 to 4 with silvery-gray pollen con- 

 fined principally to bases of segments; second and third segments 

 with a pair of discal macrochaetae ; first and second segments with a 

 pair and third with a row of marginal macrochaetae ; fourth segment 

 Avith a discal row and tipped with marginal bristles. 



Length 7 to 8 mm. 



Type locality. — Mount Washington, N. H. 



Distribution. — New Hampshire 1, Idaho 2, Wyoming 1. 



Type.— Male, U.S.N.M. No. 3753. 



Host. — Unknown. 



Remarks. — The material examined consisted of the type male (Mrs. 

 Slosson) and three females collected by Aldrich. 



5. Genus SISYROPA Brauer and Bergenstamm 



Sisyropa Br.vuer and Bergenstamm. Denkschr. Akad. Wiss. Wien, math.-nat. 



KL, vol. 56, p. 1G3, 18S9; vol. 58, p. 344, 1891.— Coquiixett, Proc. U. S. 



Nat. Mus., vol. 37, p. G06, 1910.— Townsend, Manual of myiology, pt. 4, 



pp. 207, 209, 211, 1936. (Genotype, 15 Tachina thermophila Wiedemann. 



Monotypie example; Brauer and Bergenstamm, 1889.) 

 Exorista of Coquilt.ett (nee Meigen) partim, U. S. Dept. Agr., Div. Ent, 



Tech. Bull. 7, p. 100, 1897. 

 Oxexorista Townsend, Proc. Ent. Soc. Washington, vol. 14, p. 165, 1912; Proc. 



Biol. Soc. Washington, vol. 28, p. 21, 1915; Manual of myiology, pt. 4, 



pp. 206, 207, 210, 211, 1936. (Genotype, Exorista eudryae Townsend. By 



original designation.) (New synonymy.) 

 Zenillia of Axdrich and Webber (nee Robineau-Desvoidy) partim, Proc. U. S. 



Nat. Mus., vol. 63, art. 17, p. 7, 1924. 



Brauer and Bergenstamm in their synopsis in 1889 cited Tachina 

 thermophila as the monotypie example of the genus Sisyropa, which 

 makes it the genotype. Brauer and Bergenstamm did not recognize 

 the genus Carcelia, and their species in 1891 were divided mostly be- 

 tween the genera Sisyropa and Parexorista. As defined by this paper, 

 species of Aplomya and Zenillia were also included in their genus 

 Sisyropa. 



Owing principally to the fact that the pertinent diagnostic char- 

 acters were not selected, the status of Sisyropa has been a perplexing 

 question for many years. The European authorities gradually ac- 

 cepted it as being synonymous with Carcelia. Townsend made an at- 

 tempt to apply its use to the North American fauna in his Sisyropa 



15 The writer had the privilege of examining the Sisyropa genotype, thermophila (Wiede- 

 mann), which is in the Natural History Museum, Vienna, Austria. 



477396 — 42- 



