PREFACE. XV 



TYPES OT 1 FABRICTUS , MACQUART, WIEDE5TAKN AND WALKFB. 



North American types of Fabricius, which must be preserved in 

 his collection in Kiel, I have not seen. Most of them have 

 been redcscribed by Wiedemann. A few of the types of 

 Fabricius in the Banksian collection, in the British Museum, 

 also in the Museum of the Jardin des Plantes in Paris, I ha\e 

 been able to identify. 



The majority of Wiedemann's North American types are 

 preserved in the Zoological Museum in Vienna; but there are 

 some few in the Museum in Berlin; and also in Westermann's 

 collection in Copenhagen. 



The types of the Museum in Vienna are contained in three 

 different collections: the general collection, the so-called collection 

 of Wiedemann, and the collection of Winthem. This is in 

 accordance with the statements of "Wieilemann at the end of his 

 descriptions (,,im Wiener Museum", ,,in meiner Sammlung" and 

 ,,in v. Winthem's Sammlung"). The original distribution of the 

 types between these three collections, has not, however, been 

 preserved intact; a large number of types from Wiedemann's 

 collection is now found in v. V* inthem's, and in some cases even 

 the type, taken from Wiedemann's collection, has been replaced 

 by another, wrongly named specimen*). 



There is no doubt that this transfer of specimens took place 

 at the time, when both collections were owned by v. Winthem. 

 He must have begun the work of incorporating Wiedemann's 



*) Thus the type of Tabanus Reinwardtii is hot in Wiedemann's 

 collection, where it should have been, but in v. Winthem's; the T. 

 Keimvardtii at present found in Wiedemann's collection is an entirely 

 different species. Exactly the same is the case with the type of As tins 

 aestumis, and a wrongly named specimen in Wiedemann's collection has 

 led Dr Schiner to an erroneous conclusion about the identity of that 

 species. Dr. Schiner's paper: Die Wiedemann'schen Asiliden (Verh. 

 Zool Bot. Ges. I86ti), was written under the impression that the so- 

 called collection of Wiedemann still contained all the types referred to 

 it in the Auss. Zvveifl., and the readers of that paper must not lose 

 sight of that fact in making use of Dr. Schiner's statements. Nearly 

 all the types of Tfilxnnts are in v. Winthem's collection, hut in other 

 genera , for instance in Volucclla most of the types are still found in 

 Wiedenianu's collection. 



