OF WASHINGTON, VOLUME XVII, 1915 107 



Described from one female and two male specimens, the former 

 fragmentary. All reared (from a cage in which undetermined 

 grasshoppers were confined) Aug. 8, 1914 at Pasadena, N. J., 

 by H. K. Plank of the U. S. Bureau of Entomology, in whose honor 

 this interesting fly is named. Type, a male, deposited in the 

 U. S. National Museum, Washington, D. C. This species 

 bears superficially a close resemblance to Acemyia tibialis Coq. 

 but is obviously generically distinct. Nature apparently takes 

 delight in demonstrating how closely she can approximate two 

 entirely distinct forms. 



REVISION OF ^lYIOPHASIA. 



BY CHARLES H. T. TOWNSEND. 



In 1891 the writer erected the two new genera Phasiodista, 

 genotype P. metallica new species; and Ennyomma, genotype 

 E. distoides new species (Trans. Am. Ent. Soc. XVIII, 369 and 

 371). In the same year Brauer & von Bergenstamm erected 

 the new genus Myiophasia, genotype Tadiina cenea Wiedemann 

 (1830) from Montevideo, S. A. (Muse. Schiz. II, 362). The 

 latter authors misidentified Georgia specimens of Phasiodista 

 metallica with Tachina cenea, as indicated by Wiedemann's 

 description, 1 and gave therefrom what they considered to be a 

 redescription of the latter species. They explicitly state in their 

 text that they had Wiedemann's badly preserved holotype of 

 Tachina cenea before them at the time, from which it results that 

 their cenea is a composite species; and, if this be not sufficient 

 for the genotype fixation of Myiophasia, their use of the words 

 "Type Montevideo" after the name cenea would seem to fix that 

 species as the genotype despite the misidentification principle 

 involved. 2 



In 1892 the writer described three new species of this group 

 under the names Loewia globosa (Ent. News III, 129), Lcewia 

 ruficornis, Lcewia nigrifrons (Can. Ent. XXIV, 77), and Clista 

 americana (I.e. 78), the last two being in all probability male 

 and female of one species. 



1 The combination (in male) of deeply golden-rayed wings, yellow 

 wing-veins and deep golden tegukv, with strongly oblique crossveins, 

 described by Wiedemann for Tachina tenea, does not occur in any of the 

 North American forms seen by the writer. 



2 In order to place the genotype of Myiophaxia beyond dispute, the com- 

 posite species M i//<>/>lm*i'<i nin-n Brauer & von Bergenstamm, 1891, Denk- 

 schr. Kaiserl. Akad. Wiss., Math.-Nat. Cl. LVIII (Muse. Schiz., II) 

 362, is hereby restricted to the species Tachina a:aiea Wiedemann, 1830, 

 Aussereurop. Zweifl. Ins., II. 298, as represented by tin- Montevideo (South 

 America) holotype. C. H. T. T. 



