NOTES. 255 



at the yellow humeral tuhercle, follows the anterior margin of the thorax 

 anl before reaching its middle, turns backwards; in the middle of the 

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

 parallel yellow lines are percejitible. 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 

 ar:uated yellow stripe, rpsting with its middle on the anterior, with its 

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

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

 segments are clotlied with a line 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- 

 pvgium 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 J\[. qundriftt^^cuda the second basal cell and the 

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

 hyalinej. Legs; fe.iiora 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. 



Leufjht: 12 mm. Hah., 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. Co)iopfi, in Neue Dipt. Beitr. I, p. 20 1,1853); in the latter 

 several N. A. species are described. 



258. Conops p'ctus Fab. According to Loew, in litt. the C. pictus 

 Wiedemann, Auss. Zw. II, 239, 7 is a different species frotn pidKs Fab. 

 In Macquart, the specimens, received from Serville, 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 Fabricias's, 

 "Wiedemann's, and Macquart's descriptions notwithstanding. There is 

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

 Hintoicih.'^cjriffd 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 Schauin's Jahresbericht 1851, p. 133.) 



2G0, Dr. Schiner in the Verb. Zool. Bot. Ver. 1857 is in error 

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



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

 236-238. 240. 245-247, 249—251, 254, 255 are repriiitea. with some einendations, fr.im my 

 List, of the North Aniericun SyrphiJae, in the Bulletin of the liufialo Society of Nut. History, 

 Decemb. Ib75. 



