THE CANADIAN ENTOMOLOGIST. 301 



A PRELIMINARY GROUPING OF THE DESCRIBED SPECIES 



OF SAPROMYZA OF NORTH AMERICA, WITH 



ONE NEW SPECIES. 



BY C. H. TYLER TOWNSEND, LAS CRUCES, NEW MEXICO. 



« 



The following is a purely provisional grouping of the described North 

 American species of Saproniyza^ made up from the descriptions alone. 

 As such, it is offered for publication. The practical use of this kind of 

 work does not need pointing out. It greatly facilitates the identification 

 of species where the descriptions are scattered through various works. 

 In the determination of the single new species described at the end of 

 this paper, it was necessary to consult each description separately. It 

 required but little additional labour to tabulate the leading points in the 

 descriptions, thus relieving later students from the necessity of going 

 through the same laborious process. It is only necessary to give a warn- 

 ing against using the table without consulting the descriptions. The re- 

 ferences to the latter will be found in the Osten Sacken Catalogue. 



PRELIMINARY TABLE OF N. A. SPECIES SO FAR DESCRIBED. 



a Flavous, rust yellow or rufous species. 



b Wings, without distinct markings (spots or fasciae). 



c Antennae and palpi concolorous with" rest of body. 

 d Face and body unspotted. 



e Antennce, palpi, and body flavous, wings lutescent 



BispiNA L\v. (Nebr.) 



TENUISPINA Lw. (Nebr.) 



ROTUNDicoRNis Lw. (Sitka.) 



ee Antennae and body pale honey-yellow, terminal 



antennal joint rounded; wings with a slight yellow. 



ish tinge .connexa Say. (Indiana) 



eee Antennae ferruginous, palpi golden ochreous, body 

 yellow, wings yellowish ; front honey-yellow 



SORDIDA Wd. ( W. Indies) 



eeee Antennre and body fulvous, palpi yellow ; wings 



clear amida Wlk. (Ga.) 



(id Face with a black spot. 



f Body unspotted, lutescent, opaque ; wings 

 yellowish-cinereous .... macula Lw. (Texas) 



