522 [December 



while Kirby describes A. MdcCullorhi! as having orange tufts on ante- 

 rior and middle tibiae like A. orfom'irit/nfa. 



I name this species after its discoverer, Mr. James Ridings, whose 

 valued labors have added greatly to our knowledge of North American 

 Lepidoptera. 



HEPIALUS. Fabricius. 

 Hepialus pulcher. n. sp. (Plate 5, fig. 3. % .) 



Anterior wings pale brownish, with a salmon colored tinge, especially 

 on the fringe and margins, with irregular shaped spots and bands of 

 silvery white. One of these on the costa at base, and two more at in- 

 ternal margin ; along the center of the wing runs an irregular baiul 

 which joins within internal angle an oblique sub-terminal uneven baud, 

 which latter emerges from the apex ; a sub-costal discal spot joined to 

 the central band, and another smaller sub-costal spot before the apex; 

 a terminal series of five small spots extending half way up the wing 

 from internal ano;le alon"; external mar";in ; under surface immaculate. 

 Posterior wings pale blackish, immaculate, with similarly colored fringes 

 and costa as anterior wings. Tborax and head pale soft sable brown, 

 legs and antennje darker ; abdomen somewhat similarly colored with 

 posterior wings. % . pjxp. 1.50 inch. 



Httbifat. — Colorado Territory, Mr. J. H. Ridings. (Coll. Ent. Soc. 

 Phil.) 



Resembles the Labradorian Hipiahis Ju/pcrhoreus Mlischler; judg- 

 ing from the figure of the latter, (W. E. M. Vol. 6, PI. 1, fig. 1.) our 

 species is larger and the coloration different. 



Hepialus gracilis, nov. sji. (Plate 5, fig. 4. % .) 



Anterior wings cinereous, with very sparse squammation. crossed 

 obliquely by paler undulate bands, of which the best defined runs from 

 the apex, where it bi-oadly bifurcates, enclosing a small costal sub-apical 

 dark spot, to internal margin within internal angle, with a double inter- 

 nal undulate cinereous line. The terminal space bordering this band 

 is covered with bronze and blackish scales, knd a space below the me- 

 dian vein is similarly colored, bordered with paler scales and constricted 

 before internal margin ; similarly colored scales on costa, and the median 

 space beyond the disc is also covered with them. Posterior wings pale 

 cinereous, with very sparse squammation, a small sub-apical costal darker 

 spot, otherwise without markings. Under surfiice of both pair pale ci- 



