110 
Psyche 
[December 
smaller than in persius, there being no overlap in size. The 
right upper lobe seems to vary a good deal in shape, with 
very little variation in size (unlike lucilius, whose average 
size is about the same). 
Most of the specimens I have seen come from Arizona; 
there is one before me from Colorado (Oslar). 
Thanaos lucilius Scudder and Burgess 
1870. Nisoniades lucilius Scudder and Burgess, Proc. Bos- 
ton Soc. Nat. Hist., xiii, 287, fig. 2 (male genitalia). 
1872. Nisoniades lucilius Lintner, 23rd Rept. N. Y. State 
Lab. Nat. Hist. 162, pi. vii, figs. 1, 2 (Ent. Cont. p. 
31). 
1873. Nisoniades lucilius 24th Rept. N. Y. State Lab. Nat. 
Hist., 162, 164, 167 etc. (Larva on Aquilegia). 
1889. Thanaos lucilius Scudder, Butt. E. N. A. ii, 1458- 
1467, pi. ix, fig. 4, xxxvi, figs. 4-6, etc. 
1898. Thanaos lucilius Holland, Butt. Book, pi. xlviii, fig. 
10 . 
1921. Thanaos persius, race lucilius Lindsey, Univ. Ia. 
Stud, ix (4) 52, (pi. ii, fig. 5; male genitalia probably 
of this, as persius). 
1931. Erynnis lucilius Lindsey, Bell and Williams, Deni- 
son Univ. Bull. Jour. Sci. Lab. xxvi, 62 (pi. xiv. re- 
printed from preceding) . 
Bibliography under this name is generally correct, the 
foodplant serving to tie it down. 
Genitalia essentially as in baptisix, but apparently on the 
average with the upper lobe of the right valve broader in 
proportion. Size much more variable than shape (unlike 
afranius) but generally a little smaller than baptisix, 
about in proportion to the size of the butterfly. 
Superficially lucilius has a more purplish tint, the paler 
areas, especially the one beyond the cell, having even a rosy 
iridescence in a favorable light (mentioned by Lintner). 
The average size is smaller, generally under 30 mm. ex- 
panse. The blackish markings on the fore wing are apt to 
be a little narrower ; for instance, the ante- and postmedial 
spots in the submedian area are generally shorter than their 
