NOTES? 255 



at tlie yellow humeral tubercle, follows the anterior margin of the thorax 

 and before reaching its niid'lle, turns backwards; in the middle of the 

 anterior margin, between the two angular lines, two delicate, short 

 parallel yellow lines are perceptible. Scutellum brown in the middle, 

 with yellow borders. Pleurae brown ; a yellow spot above the root of 

 the front coxae. Abdomen light brown; second segment with an 

 arcuated yellow stripe, resting with its middle on the anterior, with its 

 emls on the posterior margin, which is also yellow; the inside of the 

 semi-circle thus formed, is dark brown, velvety; the third and fourth 

 bfgments are clothed with a tine sericeous down; the third has a dis- 

 tinct tubercle in the middle and is margined with yellow posteriorly; 

 the fourth is traversed by a yellow cross-band in the shape of an 

 inverted V, the ends of which do not reach the lateral margins; hypo- 

 pygium brown. Anterior half of the wings brown, the posterior hyaline; 

 the anal cell, the second posterior, the discal and a part of the first 

 posterior cell, as well as the whole posterior margin, including the 

 alula, being hyaline (in M. quadrifasciata the second basal cell and the 

 whole portion of the first basal, situated behind the spurious vein, are also 

 hyaline). Legs; femora dark brown, the hind ones with a strong tooth 

 on the underside; tibiae yellowish-brown, pale yellow at the base; front 

 tarsi brown; middle and hind ones reddish-brown, two or three last 

 joints brown. 



Leiiyht: 12 mm. Hal>., Mexico.*) 



256. Compare H. Loew's Ceria in his Neue Dipt. Beitr , I (1835). 



257. See the papers by Loew: 



1. Ueber die Ital Arten d. Gatt. Conops, in Dipterol. Beitr. Ill (1847). 



2. Conops, in Neue Dipt. Beitr. I, p. 20 U5o)-, in the latter 

 several N. A. species are described. 



258. Conops pictus Fab. According to Loew, in litt. the C. pictiis 

 "Wiedemann, Auss. Zw. II, 239, 7 is a different species from pictus Fab. 

 In Macquart, the specimens, received from berville, are pictus Fab. ; the 

 others pictus Wied. 



259. Stylomyia confusa Westw. I have but little doubt about the 

 identification of this species, Westwood's strictures on Fabricius's, 

 Wiedemann's, and Macquart's descriptions notwithstanding Tlie/e is 

 some confusion in Wiedemann's description , when he speaks of the 

 Hinterleibsgriffel of the male. The Brazilian specimens may somewhat 

 differ in coloring, or perhaps constitute a different species, in which 

 case Say's name would have to be adopted for the North American 

 species. (Since writing the above I found substantially the same state- 

 ment by Loew, in Schanm's Jahresbericht 1851, p. 133.) 



260. Dr. Schiner in the Verb. Zool. Bot. Ver. 1857 is in error 

 when he states that the name Stachynia was introduced by Macquart in 



*) Observation. The notes 196 200, 210, 212 214, 215, 217, 226, 232, 234, 

 236-238, 240, 245-247, 249-251, 254, 255 are reprinted, with some emendations, from my 

 List, of the North American Syrphidae, in the Bulletin of the Buffalo Society of Nat. History, 

 Decemb. 1875. 



