72 
Psyche 
[March 
prairie regions from Minnesota and South Dakota to Indiana, 
Nebraska and Colorado. 
(2) Lethe appalachia R. L. Chermock, widely distributed from 
Maine to northern Florida, westward to South Dakota and Alabama, 
broadly sympatric with L. e. eurydice but occurring primarily in 
swamp forest, shrub swamps and forest-edge ecotones. 
These forms have had a particularly extensive history in earlier 
literature, involving not just the above names but several others as 
well, as may be seen below. 
Taxonomy 
In reviewing the taxa of the Lethe eurydice group, we have given 
the synonymies in strict chronological order, following the practice 
of some of the older authors. We hope this practice will add his- 
torical perspective to the discussions of these intricate synonymies. 
The distributional data and maps (figs. 21, 22) were based on 
material examined in the following institutional collections: Ameri- 
can Museum of Natural History, New York (AMNH) ; Academy 
of Natural Sciences of Philadelphia (ANSP) ; United States Na- 
tional Musuem, Washington, D.C. (USNM) ; Carnegie Museum, 
Pittsburgh (CM) ; Cornell University, Ithaca, New York (CU) ; 
New York State Museum, Albany (NYSM) ; and Hope Depart- 
ment of Entomology, Oxford University, England (Oxon.). Also 
the following private collections: Robert H. Whittaker (RHW) ; 
David J. Horn (DJH) ; Arthur M. Shapiro (AMS). A few 
reliable printed or other records, based on specimens not seen, are 
given separately, along with a few which are queried. 
The sexes of Lethe are very similar and may at times be difficult 
to determine in a superficial examination. We have therefore listed 
only the localities and dates of material examined. In the case of 
large series, only a range of dates may be given. 
The characters differentiating the three entities recognized in this 
paper are summarized in Table 1 and in the accompanying section 
of the text. A brief summary of the most conspicuous characters 
of each is given following its taxonomic history. 
Lethe eurydice eurydice (Johansson) 
Papilio eurydice Johansson 1763, Amoen. Acad. 6: 406; type locality Phila- 
delphia [Pennsylvania] ; type formerly in the De Geer collection 
(Stockholm, Sweden), now lost; neotype designated below. 
Papilio canthus Linnaeus 1767, Syst. Nat. (12th ed.) : 768; type locality “in 
America septentrionali ;” no type exists (replacement name for Papilio 
eurydice ) . 
