VARIATIONS m HAHIT AND IN LIFE. 1415 



above, liiiviiii; ;i iiiodorately dofp, bnsiil, tiiiiii^nliir ilcinvs-sioii ; viewed from Iho side, 

 straight in the basal two-thirds, bent slightly downward beyond, and tapering to a 

 ronnded tip; beneath deeply suloate in the basal two-thirds; tip armed with very 

 strongly sinnate, long and slender, equal booklets, bearing a reversed, expanded cup, 

 wider than long. From a specimen received from Mr. W. II. Edwards. 



This American gt'iuLs i.s coni[)Oscd, so liir as I know, of only tv^'o species, 

 witli ii siiniiar range, whose home is the soiitliern I'^nited States, east of 

 the Kocky jMountains. One species extends into Mexico, the otlier to the 

 southern portions of New England. 



Tiie butterflies are only a little smaller tiian those of the preceding 

 genus and have a similar form, excepting that the prolongation of the hind 

 wings is so regular as not to form a distinct lobe. The color and mark- 

 ings of the fore wings are either the same as in Epargyreus or as in 

 Thorybes, but the wings are more variegated beneath, the hind wings be- 

 ing marmorate with transverse lines and sometimes heavily marked with 

 dull white on the outer half. 



They are double brooded in the soutii, but the more northern species 

 becomes single brooded in the north, wintering in all probability in the 

 chrj-salis and flying in June. The caterpillars feed on Leguminosae and 

 perhaps other plants, i)ut the historv of the species is not well known. 



The egg is considerably broader than high, well domed, with about a 

 dozen vertical ribs. 



The caterpillars have the form of those of Epargyreus ; the single species 

 known is green, ornamented with a dark, mediodorsal line and slender, 

 subdorsal, yellowish lines. The chrysalis resembles that of Thorybes. 



EXCURSUS LV. — VARIATIONS IN HABIT AND IN LIFE 



ACCORDING TO LOCALITY AND SEASON 



OF THE YEAR. 



Vor mir erortnet siih das Buch 



Der Ichreudcn Natur. 

 Ich Schiller blicli' es an, uiul schon 



Schonles' ich stamraeind Gott, 



Gott in tier Praelit (its Schmetterlingg, 

 Gott in der Biene Fleiss, 



Im Zwitscheii ilcr Cicade Gott, 

 Im GrillenliedcGott. 



Wiener Verzeichniss. 



Stability and instability are curiously mixed in the lives of butterflies. 

 Observe the habits of certain kinds and you would suppose they were sen- 

 sitive to the least influence from outside, scenting as it were the approach 

 of winter from afar and making early provision for it. Winter, indeed, is 

 the prime cause of variety in nature, — at least in tiie lives of animals, and 

 hence, as already insisted on, we find in this particular much more variety 

 in temperate regions than in the tropics. On the other hand there are 



