ACADEMY OF NATUEAL SCIENCES. 165 



seen one pair of this species, and not possessing it, I can not give a diagnosis. 

 It may be that it is identical with C. Inornata, Edw., or C. Ochracea, Edw., or 

 some other Northern species. 



Extratropical America is not rich in Satyrides, if compared to the same lati- 

 tudes in Enrope or Asia, and California is especially poor. 



Europe California. 



Arge, 



Erebia, 



Chionobas, ' Chionabas, 



Satyrus, Satyrus, 



Pararga, 



Epincphele, 



Coznonympha, Coznonympha. 



There are seven European genera, each of them represented by a whole 

 series of species connecting different types. In California there are only three 

 of which none i3 known to contain more than four species, 



The Atlantic States add some tropical genera to the three genera already 

 obtained in California, viz. : Neonympha Hubner, Hyhpthima Hubner, Debis 

 Dbld., and Calisto Hubner. The genus Calisto seems to be confined to subtro- 

 pical North America; the genus Neonympha spreads in numerous species 

 thiough the tropics of America, and trespasses only in a few species the 

 Cancer; Hyphthima is found in many species in the tropics of the Old 

 World, and it is a very curious circumstance, that one species of this essen- 

 tially Gerontogeic genus should be found in the Southern States. But the two 

 American species of the genus Debit, are even more interesting, for all other 

 species of this genus, are confined to the Indian Archipelago. 



The metamorphoses of the Satyrides, are only with difficulty to be investi- 

 gated. 



They feed as far as they are known, on Monocotyledoneous plants, the ex- 

 tratropical ones, with one exception perhaps, exclusively on Graminaceous 

 plants. The Caterpillars shun the sunlight and hide themselves in the grass. 

 Some of them bury themselves in the daytime in the ground and feed only at 

 night. The tropical species feeding on Scitaminaceous, Aroideous plants, 

 palms, and arborescent grasses, sport the shady thickets of tropical _ forests, in 

 whose twilight depths, most of the species are also found in their imago state. 

 Other ones like some of the Morphonidcs, and even some Nymphalides of the 

 tropics, spend their days hidden under the luxuriant foliage of primeval forests 

 and begin their flight only after sunset. 



In a most interesting treatise on the characteristics of the insect faunn. ot 

 the " White Mountains," by Samuel H. Scudder, (Boston Journal, Vol. VII, 

 Part IV), I find the description of the Caterpillar of Chionobas Semidea, Edw., 

 with p. notice that it was found on Lichen. This would prove a most remark- 

 able exception, as all the other Satyrides feed on Monocotyledoneous plants. 

 Nevertheless, larvas of Artie types are generally polyphagous, and adapted 

 to some degree, to accomodate themselves to circumstances, and so I would 

 not entertain any doubts about the feeding plant of the Chionobas, if it were 



