[Berliner Entomolog. Zeitschrift Bd. XXXVI. 1891. Heft II]. 417 



Additions and Corrections 



to the Catalogue of the described species of 



South -American Asilidae 



by S. W. Willis ton, in the Trans. Ent. Soc. Vol. XVIII, 1891, 

 by G. R. Osten Sachen. 



The present paper is the result of a collatioii of Prof. Williston's 

 recently published Catalogue with a manuscript list of all the de- 

 scribed exotic diptera, prepared by me about ten years ago. Although 

 the number of corrections which I introduce looks rather formidable, 

 it will be seen that only a small proportion of them can be imputed 

 to my friend's, the author's, remissness. The generic or specific 

 names omitted by him are few, and most of them were published in 

 some inaccessible papers of Rondani. A large number of the minor 

 corrections are more formal than real: they are attempts to introduce 

 more completeness and uniformity in the double references, so often 

 necessary, to the volume of a scientific periodical, and to a se- 

 paratum of the paper referred to. This concerns especially the 

 works of Rondani and E. Lynch Arribalzaga. I am far from be- 

 lieving that my own corrections are exhaustive, i) but at any rate 

 what I offer will contain some useful material for a future revised 

 edition of the Catalogue. 



I would recommend that in this future edition, references to 

 periodicals should contain either both date and serial number of the 

 volumes, or the date alone, but never the volume alone, which involves 

 more than one inconvenience. 



I. Omissions and corrections of graver moment. 



Page line 

 71 — After Bathypogon insert the genus Astylium Rondani, 

 N. Ann. etc. di Bologna 1850 (Sep. Osservazioni etc. 23) 

 with the species A. elaviger Rond. 1. c. Sep. p. 23, 

 fig. 8. — Venezuela. 



i) A portion of E. Lynch Arribalzaga's work I possess in a ma- 

 nuscript copy only. 



XXXVI. Heft II. 27 



