1852 REPORT OF THE CHIEF OF ENGINEERS. 



Colias var. Eurytheme. 



Colias var. Eurytheme, BOISDUVAL, Annales Soci6t6 Entomologique de France, 2e srie. x, p. 



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



(1869). 



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

 Colias Amphidusa, BDL., Ann. Soc. Ent. FT., 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. Ckrysotheme, 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 Crysaliis. 



Family 



Genus THECLA Fabr. 



Thecla Cry solus, 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 New Mexico. It belongs to or near the same 

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



Thecla Melinus. 



Thecla Melinus, HUBXER (Strymon M.), Zutrage znr Sammlung Exotischer Schmetterlinge, 



fig. 121, 122 (1818). 

 TtieclaHyperici, 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, Syn. Lep. X. Am. 



p. 95 (1862). 

 Thecla HumuK, 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 Silenus, DOUBLEDAY, List British Museum, ii, p. 31 (1847). 

 Thecla Melinus var. Pudica, HY. EDWARDS, 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, FABRICIUS (Hetperia T. ), Entomologia Systematic^, iii, 1, p. 297 (1793). 

 Strymon Mopsus, HUBNER, Verz. Bek. Schmett. p. 74 (1816) ; Chrysophanus M., Zutr. Ex 



Schmett. fig. 135, 136 (1818). 

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



N. 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 LYC.ENA Fabr. 

 Lyccena Acmon. 



Lyccena Acmon, DOUBLEDAY & HEWITSON, Genera of Diurnal Lepidoptera, ii, p. 294, t. 76 



(1852). STRECKER. Lept. Rhop.-Het. p. 88 (1874). 

 Lyccena Antcegon, BDL., Ann. Soc. Ent. Fr. 2e ser. x,p. 295 (1852). MORRIS, Syn. 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. 



Lyccena Melissa. 



Lyccena Melissa, 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. 



Lyccena Battoides. 



Lyccena Battoides, BEHR., Proceedings California Academy of Natural Sciences, iii, p. 282 



(1867). STRECKER, Lep. Rhop.-Het. p. 87 (1874) ; Catalogue, p. 94 (1878). 

 Lyccena Glaucon, EDWARDS, (W. H.), Trans. Am. Ent. Soc. iii, p. 210 (1871). 



At Eio ^Tavajo Valley, at upper part of river, August 8, and at Kio de 

 los Pinos, at the park, at mouth of the Vallecito, August 27, several ex- 

 amples, all males, were taken. 



