OSTEN SACEEN ON WESTERN DIPTERA. 265 



calvus Loew, Centur., iv, 54. — New York. 



onacropterus Loew, Centur., ix, 76. — New York. 



subauratus Loew, Centur., iv, 55 ; also ix, 77, nota. — Pennsylvania. 



vitripennis Loew, Centur., ix, 77. — Middle States. 



albidipennis Loew, Centur., ix, 78. — California. 



Ststropus. 



Only a single species has been discovered in the United States, 

 S. macer Loew (Cent., iv, 56). It occurs in all the Atlantic States. I 

 have seen it from Kansas. I do not know whether it goes farther west 

 or not. 



S. macer has been bred from the cocoon of a Limacodes, the larvse of 

 which are allied to those of L. pitJiecium (see Walsh, in the Proc. 

 Bost. Soc. N. H., vol. ix, 300, Febr., 1864). The fly, kindly communi- 

 cated to me by Mr. Walsh after the- publication of the article, is not a 

 Conops, as he thought at the time, but Systropus macer. Quite recently, 

 Mr. Westwood bred a species of Systropus from a South African 

 cocoon, resembling that of Limacodes (Trans. Entom. Soc. London, 

 1876, 575). 



Lepidophoea. 



Lepidophora ^geruformis Westw. — Occurs from Georgia to 

 Kansas. 



Lepidophora appendiculata Macquart, suppl., i, 118. — Texas. 



A third species, L. (ToxopJiora) lepidocera Wied., without locality, 

 is mentioned by Macquart, 1. c, as possibly the female of his species. 



TOXOPHORA. 



Two North American Toxophorm bave been described, T. amphitea 

 Walk, and T. leucopyga Wied.; two have been figured, but not described, 

 T.fulva Gray and T. americana Guerin. 



T. leucopyga Wied., i, 361 (without patria), was referred by Mac- 

 quart (ii, 1, 117) to a species from the Caroliuas ; this species has only 

 two submarginal cells, and no stump of a vein in the second posterior ; 

 the third vein (and not the second) is furcate ; both Wiedemann's (tab. 

 V, f. 3) and Macquart's (1. c, tab. xiii, f. 1) figures agree in this. 



T. americana Gu6rin is not described; the figure shows four complete 

 posterior cells, and an abdomen with interrupted cross-bands, but no 

 longitudinal stripe, as in both species described below. 



T. fiilva Gray, in Griffith's Auim. Kingd., Insects, tab. 126, f. 5, from 

 Georgia (Walker, List, etc., ii, 298), is described (1. c, 779) thus: 

 '' fulvous, with a black mark on the thorax and black lines across the 

 abdomen". The figure agrees with this statement (it can hardly be 

 called a description). 



The metamorphosis of Toxophora was hitherto unknown. Mr. Town- 

 end Glover in. Washington, D. C, observed a Toxophora, the larva of 

 which inhabits the well-known globular clay nest of the Wasp, Eumenes 



