ZENILLIA AND ALLIED GENERA — SELLERS 71 



Exorista of authors (nee Meigen) Coquiixett (partim), U. S. Dept. Agr. Div. 



Ent., Tech. Bull. 7, p. 91, 1897— Baer (partim), Zeitschr. Angew. Eut., vol. 



7, p. 112, 1921.— Stein (partim), Arch. Naturg., Abt. A., Heft 6, p. 67, 1924. 



—Lundbeck (partim), Diptera Danica, pt. 7, p. 307, 1927.— Baranoff 



(partim), Institut fur Hygiene uud Schule fiir Volksgesundheit, Zagreb, 



Arb. parasit. Abt. No. 3, 1931. 

 ZcniUia of authors (nee Meigen).— Baer (partim), Zeitschr. Angew. Ent., vol. 



7, p. 118, 1921.— Aldricii and Webber (partim), Proc. U. S. Nat. Mus., vol. 



63, art. 17, pp. 1-43, 1924.— Lundbeck (partim), Diptera Danica, pt. 7, 



p. 337, 1927. 

 CoUatia Curran, Families and genera of North American Diptera, p. 464, 1934 — 



Townsend, Manual of myiology, pt. 4, p. 224, 1936. (Genotype, Zenillia 



suimissa Aldrich and Webber. Monotypic.) (New synonymy.) 



Inasmuch as Exorista Meigen has been restricted to larvarwm and 

 its congeners, Aplomya is the oldest name available to represent 

 roughly the generic equivalent of Exorista of authors (s. s.), Baer, 

 Lundbeck, etc., or a limited portion of Exorista of authors (s. L), 

 Stein, Baranoff, etc. The species now referred to Aplomya that were 

 known to Aldrich and Webber in 1924 were placed in three of the 

 four subgenera of their composite genus Zenillia. Euebneria has 

 been accepted as a synonym of Aplomya by some of the best authori- 

 ties. Euebneria represents a transitional phase between Paraexorista 

 and Aplomya; it has some characteristics of both. Curran, in estab- 

 lishing the genus CoUatia on the character of "the propleura haired 

 on the middle portion," has contradicted his opinion that "In many 

 genera the propleura is haired but in some this character is not 

 reliable." The writer believes that the best procedure is to leave 

 CoUatia submissa (Aldrich and Webber) in the genus Aplomya. 

 Townsend places Aplomya in the tribe Phrynoini, Euebneria in the 

 tribe Carceliini, and CoUatia in the tribe Lydellini. Aplomya ex- 

 hibits probably a more heterologous composition than any of the 

 other genera proposed in this paper. The bionomic relationships are 

 more obscure than they are in the other genera previously discussed. 



Aplomya can be separated without difficulty from Phryxe, Thely- 

 myia, and Chrysophryxe. In Aplomya the front at the vertex is 

 one-third or less the width of the head; the front is narrower in 

 the male than in the female, with somewhat diverging margins ; and 

 the claws and pulvilli are more elongate in the male than in the 

 female. Carcelia will not be confused with Aplomya, as in the latter 

 genus the eye does not occupy the whole side of the head ; the gena 

 is at least one-tenth the eye height, usually more ; and there are always 

 three or four sternopleural macrochaetae. The following characters 

 will readily serve to differentiate Aplomya from Sisyropa: Scutel- 

 lum with three pairs of marginal scutellars and an apical pair; hind 

 tibia usually with unequal bristles, sometimes weakly ciliate in some 

 species. A little practice should enable one to separate Aplomya and 



