1852 REPORT OF THE CHIEF OF ENGINEERS. 



Colias var. Eurytlieme. 



Colias var. Eurytheme. BOISDUVAL, Annales Soci6te Entomologique de France, 2e serie x p. 



286 (1852). MORRIS, Syn. Lep. X. Am. p. 29 (1862). EDWARDS (W. H.), Butt. X. Am. i, t. 3 



(1869). 



Colias Chrysotheme Tar., BOISDUVAL, Sp. Gen. i, p. 644 (1836). 

 Colias Amphidusa. BDL., Ann. Soc. Eut. Fr., 2e ser. x, p. 286 (1852). 

 Colias Edusa var. Californiana, MEN., Cat. Mus. Petr. Lep. i, p. 80 (1855). 



This common form, the summer brood of C. Chrysotheme, was found in numbers almost 

 everywhere on the route. The larva feeds on buffalo-grass and other species of clover. 

 It not only occurs in Colorado, but all over the Southern and Western States from the 

 Atlantic to the Pacific, and is occasional in Pennsylvania, and even in New York and 

 the Canadas. 



Thecla Crysalus. 



Family LYC^EXID^E. 

 Genus THECLA Fabr. 



Thecla, Crysalm, EDWARDS (W. H.), Transactions American Entomological Society, iv, p. 344 

 (1873). 



One male example of this beautiful insect was taken on the Rio Florida. It is found 

 also in Utah and Arizona and probably in Xe\v Mexico. It belongs to or near the same 

 group as T. Querctis L., to which species it bears some resemblance. 



Thecla Melinus. 



Thecla Melinua, HUBXER (Strymon 3f.), Zutrage znr Sammlung Exotischer Schmetterlinge, 



tig. 121, 122 (1818). 

 Thecla Hyper id, BOISDUVAL & LECoNTE, Lep. Am. Sept. p. 90, t. 28 (1833). MORRIS, Syn. Lep. 



N. Am., p. 94 (1862). 

 Thecla Favonius, BDL. &. LEG.. Lep. Am. Sept. p. 95, t. 30 (1833). MORRIS, Svn. Lep. N. Am. 



p. 95(1862). 

 Thecla Humuli, HARRIS, Ins. Inj. Veg. 1st ed. p. 215 (1841); 2d ed. p. 235 (1852) ; 3d ed. p. 



276. t. 4 (1862). 



Thecla Pan, HARRIS. Hitch. Report Geol. Min. etc. Mass. p. 590 (1833). 

 Thecla SileMM, DOUBLEDAY, List Hritisli Museum, ii, p. 31 (1847). 

 Thecla Melinus var. Pudica, HY. EDWAKDS, Proc. Cal. Acad. Nat. Sci. vii, p. 172 (1826). 



One example, a male, July 28, near the Rio Piedro. Found in all parts of the United 

 States and Territories, from Maine to Florida, and from the Atlantic to the Pacific. 



Thecla Titus. 



Thecla Titus, FAiwicirs (Jleaperia T. ), Entomologia Sy.stematica, iii. 1. p. 297 (1793). 

 titn/mon JLopswt, HOBNER, Verz. Bek. Sclimett. p. 74 (1816); Chrysophanus M.. Zutr. Ex 



Sclimett. ti}i. 135. 136 (1818). 



Thecla Mopsus, BOISDUVAL & LECOXTE. Lep. Am. Sep. p. 109. t. 34 (1833). MORRIS, Syn. Lep. 

 X. Am. p. 102 (1862). HARRIS, Ins. Inj. Veg. 3d ed. p. 278 (1862). 



Three, August 25, Rio de los Pinos, near crossing of upper road. Likewise a species 

 of wide range; the larva feeds on various species of Quercus. 



Genus LYCLEXA Fabr. 

 Lyc(ma ^-icmon. 



Lyccena Acmon, POUBLEDAY & HEWITSOX, Genera of Diurnal Lepidoptera ii p. 294 t. 76 



(1852). STRECKER. Lepr. Khop.-Het. ]&amp;gt;. 88 (1874). 

 Lyccena Atitwgon, BDL., Aim. Soc. Eut. Fr. 2e ser. x,p. 295 (1852). MORRIS, Svn. Lep. N. Am. 



p. 87 (1862). 



Taken September 15, in the Lower Florida Valley, above the Indian reservation. This 

 is one of the commonest of the Western species, abounding in Colorado, Utah, Cali 

 fornia, Oregon, and adjacent Territories, and is found in all parts from May to end of 

 September. 



Lyccvna Melissa. 



Lycccna Jfclinsa, EDWARDS. (W. H.) Transactions American Entomological Society, iv. p. 346 

 (1873). STRECKER, Lepidoptera Rhop.-Het. p. 88, t. 10 (1874) ; Catalogue, p. - 93 (1878). 

 MEAD, Wheeler s Report, v, p. 783, t. 36 (1875). 



One male taken; a number seen in July at Pagosa Springs. It resembles very much 

 the preceding, but is larger, and not of as common occurrence. 



Lyca tta Battoldes. 



Lyccena Battoi des, BEHR., Proceedings California Academy of Xatnral Sciences, iii, p/282 



(1867). STKECKEB, Lep. Khop.-Het. p. 87 (1874): Catalogue, p. 94 (1878). 

 Lyccena Olaucon, EDWARDS, (W. H.), Trans. AJII. Eiit. Soc. iii, p. 210 (1871). 



At Rio Navajo Valley, at upper part of river, August 8, and at Rio de 

 los Pinos, at the park, at mouth of the Yallecito, August U7, several ex 

 amples, all males, were taken. 



