ALDRK^H ANJ> DARLINGTON. 89 



"This species, coming from Carolina, was given me by M. Bosc 

 under the name Musca flavescens." 



Entire description- translated into English except the diagnosis. 

 We are unable to identify the species with certainty or plausibility 

 from the vague characterization. Perhaps it was really a Scato- 

 phaga, as the redness of the front would indicate. 



A pair of specimens from the U. S. N. M., locality Oswego, New 

 York, came to us under this name, while others, not specifically dis- 

 tinct, from Colorado were labeled Anorostoma marginata, we think 



correctly. 



HEL.OMYZ.4 Fallen. 



Humeral bristle absent; propleural absent; five dorso-centrals ; 

 three supra-alar; two notopleural ; one presutural ; scutellar two 

 pairs ; one fronto-orbital ; one sternopleural. Face with distinctly 

 projecting oral margin ; antennae with somewhat elongated third 

 antennal joint, the arista in most cases more or less plumose. 

 Wings large, in the majority of cases with markings, which usually 

 border the cross-veins and the apices of the longitudinal veins. 



In this genus the transverse suture of the thorax runs obliquely 

 forward from its origin at the side, so that the portion behind it is 

 larger than usual ; four of the five sternopleural bristles are behind 

 the suture. 



The species are as a rule rather large, yellow, somewhat elongate 

 forms, easily distinguished by the absence of humeral and propleu- 

 ral bristles, together with the large number of five dorso centrals. 



We have seen all the species of the table except the Mexican 



forms and apicalis; the descriptions of these, together with those 



of Walker's two supposed species, are reproduced at the end of the 



genus. 



TABLE OF SPECIES. 



1. Arista plumose 2. 



Arista bare or merely pubescent 7. 



2. Mesopleura bare 3. 



Mesopleura with hairs 6. 



3. Cheeks more than one-third the eye height 4. 



Cheeks less than one-third the eye height 5. 



4. Scutellum pilose loiigipennis Loew. 



ScntelUim with only a very few scattering hairs plliinata Loew. 



5. Scutellum bare limbala Thomson. 



Scutellum pilose quinquepunctata Say. 



6. Ocellar knob black, face with narrow silver-white lateral margins (Mexico). 



punctiilala Van der AVulp. 

 Ocellar knob not black, and no silver-white margins of face. 



uemorum Meigen. 



TRANS. AM. ENT. SOC. X.XXIV. (12) MARCH, 1908. 



