APPENDIX SS. 1851 



This is a variety of the preceding, in which the dark scales which accompany the 

 venations of the under surface are wanting, and generally destitute of the dark marks of 

 the other form ; the male has sometimes a distinct black spot in the middle of the 

 upper surface of primaries, but is frequently without it. It was observed and taken 

 in considerable numbers in most places along- the route. 



Pieris Protodice. 



Pieris Protodice. Boisduval & LkCoxte. Histoire G6n6rale et Iconographie des Lepidop 



teres et des Chenilles <le l'Amerique Septentrionale. p. 43, t. 17 (1833) ; Species General, i. \> 

 543 (1836).— Moukis, Syn. Lep. N. Am. p. 17 (1862). 



Thisis another species of wide distribution, occurring in the Canadas and in all parts 

 of the United States and Territories from the Atlantic to the Pacific. 



The survey captured many examples at Pagosa Springs, along the Kio Piedro, and 

 at other points where it was in abundance, from middle of July to end of August. 



Pieris OccidentaJis. 



Pieris Occidentalis. Kkakikt. Proceedings of the Entomological Society of Philadelphia, vi, p 



133 (1866). 

 Pieris Calyce TV. H. EDWARDS, Trans. Am. Ent. Soc. iii, p. 189 (1870). 



A single male was taken July 21 at Pagosa Springs, Colo. Though not as common 

 as Protodice, to which it is nearly allied, it is by no means a rare species in Colorado, 

 California, and Oregon ; its position is between the preceding and the European Alpine, 

 Callidice Esper. 



Genus XATHALIS Bdl. 

 Kathalis Iole. 



Xathalis Iole. BOISDUVAL, Species General des Lepidopteres, i, p. 589 (1836). 

 Xathalis Felicia, Poey. Mem. Cuba, i, p. 443, t. 18 (1851). 



Xathalis Irene, Pitch. 3d Report X. York State Agr. Soc, snppl. p. 485 (1856). 

 Xathalis Luteolus, Reakiut, Proc. Ent. Soc. Phila. ii, p. 350 (1863). 



One female, August 8, in Rio Xavajo Valley, at npper part of the river. 

 This pretty little insect is fouud in Texas, Louisiana, Antilles, Colorado, California, 

 Mexico, and Central America. 

 NatliaVut is closely related to the exotic genera Idmais Bdl. and Teracohis Swains. 



Genus COLIAS Fabr. 

 Colias Philodice. 



C'olias Philodice. Godaut, Encvclopedie Methodiqne, ix, p. 100 (1819).— Swainson (Eurymus 

 P.), Zool. 111. ii, 2d ser. t. 60' (1831).— Boisduval <fc LeCoxte. Lep. Am. Sept. p. 64, t. 21 

 (1833). 



Papilio Palceno, Cram., Pap. Exot. i, t. 14 (1875). 



Zerene Anthyale, Hub.. Zutr. Ex. Schmett, f. 307, 308 (1823). 



C'olias jEuropome, Steph., 111. Brit. Ent. Haust. i, p. 10. t. 1 (1828). 



C'olias Chrysotheme. Xastes et Santes. Fitch, Rep. X. York State Agr. Soc. viii, p. 378 (1854). 



C'olias Eriphyle, TV". H. Edwakds, Trans. Am. Ent. Soc. v, p. 202 (1876). 



A number of examples of both sexes, July 21 to September 15, at Pagosa Springs ; 

 along Weeminuche Creek to Kio Piedro and at Rio de los Pinos near crossing of the 

 upper road. 



The Colorado examples in some instances are exactly like those found east, while 

 others present some differences, being of a more delicate shade of yellow and having 

 the disk of under side of primaries suffused with pale orange. Some are of a more 

 greenish tint on under surface of secondaries. Examples agreeing with these latter 

 occur in British Columbia, and were described by W. H. Edwards as a distinct species 

 under the name Eriphyle. One of the reasons he gives for their distinctness was that 

 they invariably have the orange spot of upper surface of secondaries present ; two 

 males of the present suite show no trace whatever of these orange spots. 



He further says in allusion to Colorado examples: "Mr. Mead brought from Colo- 

 rado in 1871 a Colias very close to this (Eriphyle) from Lake Labache, and which in 

 Reakirt's paper on the Butterflies of Colorado (Proc. Ent. Soc. Phil. 1867, p. 14*) is 

 doubtless the one called Philodice. The same form was brought from Montana by Dr. 

 E. Coues, when engaged in the boundary-line commission. For the present I shall 

 give no opinion as to these, but they seem to me nearer to Eriphyle than to Philodice. 11 



The examples of Reakirt's above alluded to passed into my keeping ; they are in no 

 wise different from those found in Pennsylvania, &c. ; systematists have created by 

 far too many species of our Coliades, making of every local variety a different species. 



* Should be p. 135, not 14, as Edwards erroneously cited. 



