OF WASHINGTON, VOLUME XVIII, 1916 



99 



dipterist Friedrich Henclel, asking him to look at the type and 

 answer certain specific questions about it, also to send sketch of 

 head profile and wing. 



Owing to the absence of Hendel, the latter was answered by 

 Dr. Zerny, Custodian of Diptera, giving the following information: 



Wiedemann's type is a male in pretty poor condition. The 

 eyes are naked; I enclose a diagrammatic drawing of the head in 

 profile. The bristling of the abdomen is for the most part lost 

 by abrasion; but it can be seen that on the first and second seg- 

 ments macrochaetse are wholly wanting; on the third and fourth 

 the scars of a row of marginal bristles are present on each. A 

 sketch of the wing-venation is also enclosed. 



The three specimens from Georgia (2cf cf, 1 ) 9 agree perfectly 

 with the type; the eyes are naked in both sexes, the apical cell 

 open. 



The part of the work of Brauer and Bergenstamm in which 

 Myiophasia was published, appeared at the latest in November 

 1891; Myiophasia therefore has priority over Townsend's name, 

 which was published in December. 



The accompanying pencil sketches, copied by me with the 

 utmost care, are submitted herewith. 



Fig. 1. Myiophasia aenea, type,' from sketches by Dr. H. Zerny. 



The letter and wing figure appear to settle beyond all further 

 question that Mr. Townsend's Phasioclista metallica is a synonym 

 of Myiophasia aenea. 



Incidentally, the establishment of this fact has some bearing 

 on Mr. Townsend's theory that the various forms of Myiophaxni. 

 are each closely associated with a certain ecological environment. 

 Aenea, it appears, occurs from Montevideo to Maryland and 

 Illinois; I have it also from New Bedford, Mass., and Fort Col- 

 lins, Colo. Townsend recognizes seven principal life zones, of 

 which this form has been collected in five. Referring to his tabu- 

 lation (op. cit., p. Ill), it appears that setigera has been collected 



