142 FIELD AND FOREST. 



of our annelid would fill a volume. Within the limits of a single 

 article it is not possible to do more than simply refer to some points 

 in its structure, few and disconnected, but enough, I hope, to induce 

 the reader to believe that the earthworm is not quite the despicable crea- 

 ture popular opinion supposes it to be. The generative system is peculiar- 

 ly complex and peculiarly difficult to dissect ; the ganglionic globules of 

 the brain possess points of special import ; the parasites that live and 

 thrive within its body are more than curious — the subject is attractive 

 and one to which I desire to return. If, however, we have not at- 

 tained the object of our search; the discovery of the interesting and 

 the beautiful, it certainly is not the fault of the worm. 



A. C. S. 



Descriptions of New Species of North American Lepi- 



doptera. 



Pyrgus Xanthus. 



Male. — Expands .8 inch. 



Upper side pale black, spotted with white ; primaries have a sub- 

 marginal series of minute patches or clusters of white scales ; an extra 

 discal series of pure white spots, very much as in Centaurea ; a streak 

 or small patch at end of cell ; and a second transverse series of spots, 

 forming a broken line across the wing. 



Secondaries have a submarginal series of minute spots, of more de- 

 cided shape than on primaries ; and a discal series, of which the mid- 

 dle spot is largest and sub-quadrate ; in the cell a white streak near 

 base ; fringes long, white, cut with black at the end of the nervules on 

 both wings ; in one example observed, the black in secondaries extends 

 but a little way from the edge of the wing, the whole outer part of the 

 fringe being white. 



Under side of primaries fuscous on disk and inner margin, more or 

 less suffused with gray-brown, or wood-brown, whitish along costal 

 and hind margins ; the spots repeated ; of secondaries gray-brown, on 

 costal margin whitish ; near the hind margin a row of obsolete white 

 spots edged above with black ; the discal band repeated. The spots 

 confluent, and edged on either side by brown ; at base of cell a whit e 

 spot, and another, quadrate, on costal margin. 



