448 ENTOMOLOGICAL NEWS. [DeC, '15 



Some North American Diptera from the Southwest — 



Paper IIL* 



A Revision of the Species of the Genus Mythicomyia. 



By E. T. Cresson, Jr., Academy of Natural Sciences, 



Philadelphia. 



The material upon which this paper is based was collected 

 in western Texas, Arizona and New Mexico by J. A. G. Rehn 

 and H. L. Viereck in the late spring of 1902. The collection 

 is unusually rich in several little known genera, of which this 

 anomalous one is especially favored. The study of the mater- 

 ial resulted in recognizing eight distinct species, including 

 four considered new. Of the four previously described spe- 

 cies three of these are recognized in the material at hand. By 

 courtesy of the United States National Museum, I have been 

 enabled to examine the material there including Coquillett's 

 types. I have, therefore, seen the types of all the known 

 species. One of the new species and some of the records were 

 obtained from the United States National Museum collection 

 and are so credited. 



Of the students who have given this genus any study, I think 

 Coquillett was correct in considering it to belong to the Empi- 

 didae, and he ably states his reasons for this in Entomologi- 

 cal News, iv, 209. Williston, in his ManuaP, notes that it 

 should probably accompany Hilarimorpha in the Leptidae. In 

 the third edition of his Manual he does not include it in any 

 of the tables of genera, but mentions the genus in a note^ 

 and figures the wing, antenna and entire insect under the Bom- 

 byliidae and Empididae. Melander includes it in his Mono- 

 graph of the Empididae^ under the subfamily Mythi- 

 comyinae accompanied by Hilarimorpha, but does not other- 

 wise commit himself as to the probable relationship. Aldrich 

 and Kertesz in their catalogues place both genera in the Lep- 

 tidae. 



♦Paper I. Tr. Am. Ent. Soc. xxxii, 279-288, 1906 ; Paper II. Tr. Am, 

 Ent. Soc. xxxiii, 99-108, 1907. 



1. Ed. 2, p.73. 



2. P. 218. 



3. Tr. Am. Ent. Soc. xxviii, p. 336. 



