440) PROCEEDINGS OF THE NATIONAL MUSEUM yOL. 113 
lots of specimens identified from Corumba (the number of specimens 
are in parentheses after the museum catalog number): 
USN M: 307467(13), 307460(2), Smith coll.; 530578(3), Fulton coll.; 198539(3) 
Rolle coll.; CM: 3019(1), Stupakoff coll.; 62-1068(10), 62-1069(3), 42.034(8), 
Smith coll.; MCZ: 89562(1), 26734(1). 
Drymaeus harringtoni Marshall 
Drymaeus harringtoni Marshall, Proc. U. 8. Nat. Mus., vol. 77, art. 2, pl. 1, fig. 7, 
1930. 
Type locality: General Ballivian, Salta, Argentina. 
The type and only specimen (USNM 38070) known under this name 
is a peculiar individual among the very variable Drymaeus hygro- 
hylaeus (d’Orbigny). I examined many specimens of D. hygrohylaeus 
from Salta and Jujuy (in the collections of MACN) showing a com- 
plete transition between this species and D. harringtoni. The figure 
in Marshall’s original description of the species is not correct, because 
the specimen is placed in a position which makes the basal expansion 
of the peristome seem shorter than it actually is in the type, which is 
as in hygrohylaeus. Thus, harringtona must be included in the 
synonymy of hygrohylaeus. 
Drymaeus poecilus (d’Orbigny) 
Helix (Cochlogena) poecila d’Orbigny, Magasin de Zoologie, vol. 5, p. 11, 1835. 
Bulimus pictus Bonnet, Rev. et Magasin de Zoologie, vol. 16, p. 69, 1864. 
Otostomus (Mesembrinus) poecilus Doering, Bol. Acad. Nac. Ciencias, Cérdoba, 
vol. 3, p. 76, 1879. 
Drymaeus poecilus, Pilsbry, Manual of conchology, ser. 2, vol. 11, p. 285, 1898. 
Drymaeus poecilus, Dall, Smithsonian Mise. Coll., vol. 49, no. 17, p. 3, 1911. 
Drymaeus poecilus, Parodiz, Nautilus, vol. 71, p. 25, 1957. 
Type locality: Santa Cruz de la Sierra, Bolivia. 
Pilsbry and Dall made commendable attempts to define the typical 
form of this species. Pilsbry rightly noted that those specimens from 
Chota, Peru, mentioned by Lubomirsky and Dall, are very probably 
not poecilus, but it is no less true that Dall had good reasons to doubt 
the identity of Matto Grosso specimens referred to this species by 
Pilsbry. Dall said that the series from Ollantaytambo, Peru, collected 
by the Yale Expedition in 1911, “permits one to come to some con- 
clusions”’ but these conclusions were not very clear, because they were 
based mostly on specimens from the Urubamba Valley (where they 
are “hard to find’’), 1500 miles northwest of the places where the other 
forms of poecilus are often found under very different ecological 
conditions. 
I have examined several hundred specimens from many localities 
in different museums, and I think the solution lies in (1) determining 
just what d’Orbigny’s typical form and its distribution is; (2) providing 
a better definition of var. minor d’Orbigny; (3) determining what are 
