Mr. L. B. Pront on Argentine Geometridae. 205 
to be regretted that the vast Tring collection of Geometridae 
is not yet arranged in a manner which will allow of its 
systematic study; at the same time, I have to acknow¬ 
ledge with gratitude that every facility possible has been 
granted me by the Hon, Walter Rothschild and Dr. Karl 
Jordan, while Mr. W. Warren has been ever ready with 
his assistance and advice. 
Regarding the collection of unnamed moths referred 
to by Dr. H. Weyenbergh, on pp. 181-2, of Napp’s “Die 
Argentinische Republik ” (Buenos Aires, 187G, 8vo), Mr. 
P. C. T, Snellen wrote me (in litt., February 9, 1907) as 
follows: “Dr. Weyenbergh indeed handed to me, after 
his return to Europe, a small collection of Heterocera. 
Unfortunately, however, that collection was, shortly after, 
destroyed by accident, with the exception of a few 
Fyralidae that were taken out before. Otherwise I 
Avould, according to the wishes of my deceased friend, 
have worked it out long ago.” Weyenbergh {toe. cit., 
p. 181) commits himself to nothing more definite than 
the following: “ The Geometridae appear to be less 
numerous, at any rate thus far I know at most fifty 
species. . . . The species I have met with represent, 
as I believe, the following or related g-enera: Ennomos, 
Boarmia, Gnerphos, Zerene ?, Hibernia, Cidetria, Acid alia 
and Eninthecia. This group has as 3 ^et had little 
attention.” 
Burmeister’s “ Reise durch die La Plata-Staaten ” 
(2 Bde., Halle, 18G1, 8vo), though containing much valu¬ 
able information on the natural history of the country, 
and a good many records of Lepidoptera, does not include 
any Geometridae. E. W. White, F Z.S., in his “ Cameos 
from the Silver Land ” (2 vols., London, 1881-82, 8vo), 
only touches the Lepidoptera in one or two places, and 
has nothing on Geometridae. The same applies to W. H, 
Hudson’s “The Naturalist in La Plata” (ed. 4, London, 
1903, 8vo). 
I have thought it best, with one trifling exception, to 
accept the present political boundaries of the Ai^entine 
Republic as the basis of my work. To include the few 
scattered records from Argentine Patagonia has not added 
materially to the size of my paper; and as the only 
systematic surveys which touch Patagonia (Mabille in 
“ Mission Scientihque du Cap Horn ” and Staudinger in 
“Ergebnisse der Hamburger Magalhaensischen Sammel- 
