52 
Psyche 
[March 
1959 (J- M. and S. N. Burns) [Museum of Comparative Zoology 
no. 31888]. 
Size. — On average, limpia is larger than nessus ; and, in both 
species, females are larger than males, although size varies consid- 
erably (table 1). In nessus , the wingspread of Texas specimens 
exceeds that of Arizona specimens by at least 1 mm. 
Table 1. Maximum wingspread in well-mounted specimens of Celotes 
from Texas. 
Species 
Sex 
Number 
measured 
Wingspread 
Mean 
(mm) 
Range 
nessus 
$ 
35 
23.7 
22-26 
$ 
22 
25.1 
23-27 
limpia 
$ 
39 
25.9 
23-29 
9 
24 
27.8 
25-31 
Facies. — Fig. iE-H. Very like nessus (fig. iA-D), but with 
slightly larger and more conspicuous hyaline spots and a generally 
paler aspect. 
Noteworthy in the latter connection is a set of pale areas between 
dark marks on the proximal 60% of the ventral secondary (i.e. from 
the three hyaline spots of the secondary inward) : these pale areas 
are enlarged and whitened in limpia and hence usually more pro- 
nounced than in nessus. In dorsal view, unworn (particularly 
reared) specimens of limpia may show considerable grayish overscaling 
on the body and adjacent wing bases. The usually paler shades of 
brown and tan in limpia tend to make it reflect more and appear 
colder and harder and sometimes more contrasty. All of these 
average differences involving color are perceptible chiefly when 
limpia is compared with nessus from Texas; nessus from Arizona 
(where limpia does not occur) often essentially duplicates the facies 
of limpia — except insofar as the remarkably small average size of 
Arizona nessus gives its pattern a special sharpness. Wear and fading 
Data for specimens in Fig. 1: 
A, B — Sitting Bull Falls, 4650 feet, Guadalupe Mountains, Eddy County, 
New Mexico, V-26-1959 (J. M. and S. N. Burns). 
C, D — Topotype. San Antonio, Bexar County, Texas, VI-30-1963 (J. M. 
Burns). 
E, F — Holotype. Limpia Canyon, 5000 feet, Davis Mountains, 4 mi. WNW 
of Fort Davis, Jeff Davis County, Texas, V-2-1959 (J. M. and S. N. 
Burns) . 
G, H — Allotype. As for holotype, except V-l-1959. 
