ANTHRAX HALCYON. -73 



NOTE V. 



REMARKS ON CERTAIN AMERICAN DIPTERA IN 



THE LEYDEN MUSEUM AND DESCRIPTION 



OE NINE NEW SPECIES. 



BY 



F. M. VAN DER WULP. 



Having been occupied of late with the determination of 

 a large number of Diptera from North- and South-Ame- 

 rica, I have also examined the Diptera from these parts 

 of the world , which are in the Leyden Museum. Some of. 

 them , which were already described , have given me occa- 

 sion for making certain remarks on the synonymy etc., whilst 

 a few appear to be hitherto undescribed. The following 

 pages contain the results of my researches. 



1. Anthrax Halcyon, Say. 



Say, Long's exped. App. 371. 1. — Wied. Auss. Zweifl. 

 I. 288. 44; pi. 3 , f. 6. — Macq. Dipt. ex. 11. 1. 68. 89; 

 pi. 19, f. 6. — 0. Sack. West. Dipt. 239. 



In the Leyden Museum there are two quite similar male 

 specimens from Arizona in North-America (Neumögen). 



Wiedemann's description — I could not compare that 

 of Say — agrees tolerably well ; nevertheless I may not 

 leave unnoticed certain differences. Fii'stly I find the scu- 



Notes from thie Leyden ÜVIviseiini , "Vol. IV. 



6 



