140 Mr. C. H. T. Townsend on Diptera 



StratiomyidsB. 

 1. Microchrysa, B^.f 



One female, Rio Ruidoso ; on foliage, July 3 [Wooton). 

 About 6400 feet (this locality and elevation always mean 

 that Professor Wooton omitted to give elevation and exact 

 locality, which are taken to be just below Dowling's Millj. 



Lengtli 6 millim. 



Front nearly as wide as eyes. Arista terminal. Abdomen 

 very flattened, narrowed at base, subquadrangular, wider 

 than thorax, rounded at each end, vzholly shining green. 

 Thorax shining green with strong purple reflection. 



SyrphidsB. 

 2. Piyiza occidentalism sp. n. 



One female, Rio Ruidoso ; on flowers of Rhus glabra, L., 

 July 10. Four miles west of Dowling's Mill, 6600 feet 

 { Wooton). 



Length 5 millim. 



Diff"ers from Williston's description of P. pulchella only in 

 the following particulars : — Abdomen less than twice as long 

 as thorax. There is no " slender deep groove " before 

 margin of scutellum. Legs black ; tips of all femora, bases 

 of anterior tibiae, basal two joints of front and middle tarsi, 

 and tips of liind metatarsi with next tarsal joint yellowish or 

 reddish yellow. Hind metatarsi not more swollen than other 

 tarsal joints. The apical cross-vein is subsinuate, being 

 abruptly straight at its base, but curved on its final portion; 

 it forms a right angle with fourth vein. The auxiliary vein 

 terminates hardly beyond anterior cross-vein. Closely like 

 pulchella in all other points. 



This species is very distinct from the two described by 

 Williston in the Biol. Centr.-Am., Dipt. iii. pp. 6-7. 



Mr. W. A. Snow identifies (Ivans. Univ. Quart, iii. p. 227) 

 three specimens of Fipiza from the Magdalena Mts., N. M., 

 as P. pisticaj Will. The present species is distinct from 

 pistica in the j)ilc of eyes being black (except, perhaps, that 

 on uj)per portions next front), and the hind metatarsi not 

 being thickened. 



3. Daccha lemur, 0. S. 



One female, Rio Ruidoso, 4 miles west of Dowling's Mill, 

 6600 feet, July 10. On flowers of aumac, Rhus glabra, L. 

 [Wooton). 



Length 10 millim. 



