KRICOGONIA.— COLIAS. 151 



2. Kricogonia xmicolor, sp. n. 



Alis sulphureo-flavis unicoloribus, subtus (prater dimidio anticarum basali aurantio) pallidioribus et sericeis : 

 linea longitudinali mediana albida. 



Eab. Guatemala, San Geronimo (F. D. G. 8f 0. S.). — Haiti ; Jamaica. 



We have two examples of this species from Jamaica and one from Haiti, and a single 

 female which we believe to belong to it, captured at San Geronimo in Guatemala, 

 the only instance, so far as we are aware, of its occurrence on the continent of 

 America. 



COLIAS. 



Colias, Fabricius in 111. Mag. f. Ins. vi. p. 284 ; Boisduval, Sp. Gen. i. p. 634 ; Doubleday, Gen. 

 Diurn. Lep. p. 72. 



Colias cesonia and its allies were separated by Reakirt from the typical Colias and 

 placed in a genus Meganostoma. He found certain appendages to the hind legs of the 

 females, which he described under the name of " eupronychia " ; these being absent in 

 Colias suggested the separation of Meganostoma. We have searched in vain for these 

 structures, and, failing them, are at a loss to find characters whereby to separate 

 C. cesonia from true Colias. 



The primaries are certainly more acute at the apex, and the second subcostal branch 

 in the male is emitted just before instead of just after the end of the cell. In the 

 female no material difference can be observed. The secondary male organs are very 

 similar in C. cesonia, C. jphilodice, and C. chrysotheme — the harpagones being simple 

 lobes in each case, the extremity being serrate in the first named, and the outer edge 

 slightly concave in the others. The difference, however, in structure is comparatively 

 slight. All the females have an elongated spinous chitinous patch in the bursa 

 copulatrix. 



The genus Colias has a very wide distribution chiefly in the northern hemisphere, 

 but extending to South Africa and in South America along the Andes as far as Tierra 

 del Fuego. C. cesonia and its allies belong rather to a warmer area, and C. cesonia itself 

 is exceedingly abundant throughout our country. 



1. Colias chrysotheme. 



Papilio chrysotheme, Esp. Schmett. i. t. 65. ff. 3, 4 l ; Hiibn. Eur. Schmett. i. p. 65, ff. 426-428 \ 

 Colias chrysotheme, Elwes, Trans. Ent. Soc. Lond. 1884, p. 16 3 . 

 Colias eurytheme, W. H. Edw. Butt. N. Am. ii. Colias, 4 4 . 



Alis aurantiis, anticis costa flavescentiore, puncto in cellula nigro, apice et margine externo pallide fusco, venis 

 ad apicem navescentibus, posticis costa et margine interno flavis, macnla ad cellular finem vivide aurantia, 

 limbo externo angulum analem versus evanescente pallide fusco : subtus fere ut in C. philodice, sed alis 

 ochracescentioribus. 



5 mari similis, sed marginibus externis fuscis indistincte maculatis et subtus alis pallidioribus. 



