118 
Psyche 
[December 
Several students have attempted to clarify these matters, notably 
Bequaert (1924) who selected genotypes of many of Lutz’ genera 
and Borgmeier (1933) who, with better access to Lutz’ published 
works, corrected the dates of first appearance of some of his names 
and added others overlooked by previous workers. Enderlein (1922, 
1925) and Krober (1932, 1934) have used a number of Lutz’ 
names, and placed a good many more in synonymy, in some cases 
without adequate consideration. 
In spite of these efforts, however, no complete listing of Lutz* 
generic names has appeared, nor has the status of a number of them 
ever been carefully examined in the light of the International Rules 
of Zoological Nomenclature. The present paper is an attempt to do 
this. I have seen, I believe, all of Lutz’ publications, except one, 
which contain new generic names for Tabanidae, though there is 
always the possibility that others will turn up. Carlos Chagas (1925, 
1929, 1934) published a list, with supplements, of Lutz’ published 
works on all subjects numbering over 200, but even it contains some 
errors and omissions. His papers dealing, in whole or in part, with 
Tabanidae number 27, of which about 17 contain matter of nomen- 
clatorial importance. I have appended a list of all his papers con- 
taining references to Tabanidae of which I have knowledge, but 
there may be others. 
Lutz appears to have published, alone or jointly, 43 generic names. 
Some of these were variants in spelling or new names to replace 
preoccupied names, but 32 seem to refer definitely to newly defined 
groups of generic or subgeneric rank. All these names are here 
listed, together with references to their first appearance in print and 
remarks on their validity. I have not attempted to show synonymies 
except in a few undoubted cases, as generic and subgeneric concepts 
in Tabanidae are still in a rather fluid state. 
The most difficult point to settle is the status of the names pub- 
lished in the 1909c list. This publication is an illustrated brochure 
or guide book giving a description of the physical plant and investi- 
gations being undertaken by the Instituto Oswaldo Cruz. It also 
contains lists of the collections, publications, and library. It bears 
no date other than the year, and no authorship. In the list of 
Tabanidae, 15 new generic names are proposed, being indicated by 
“nov. gen.” or “n. gen.” in all cases. 13 of these appear with valid 
specific names, and, although the International Rules are somewhat 
loosely worded on this point, I believe, ignoring other considerations, 
