1864.] 83 



greyish at the extremities of the veins. Posterior wings brownish, 

 silky, without median line or discal lunule, with a darker shaded dif- 

 fuse terminal band, fringes white at the extremities. Under surface 

 brownish, silky, with two faint, subterminal. dai'ker bands crossing 

 both wings ; posterior wings paler, with discal dot. Collar with a dis- 

 tinct dark brown median line, upper edge whitish ; thorax with a large 

 central crest, dark cinereous with a purplish tinge ; abdomen with 

 paler hairs at the base, brownish, very slightly crested ; legs brown, 

 rarsi paler at base; head pale brownish, with a darker transverse line 

 between the eyes; palpi brown, tongue pale brownish. % % . Exp. ly^Q 

 to 2j-Q inches. 



Hab. Pennsylvania. Coll. Ent. Soc. Philadelphia. 



Two % specimens varying in size and distinctness of ornamentation. 

 In size this species approaches U. nimbosa Gruen., and E. imbrifera 

 (luen., and in coloration somewhat resembles the European E. tincta 

 V. ; it is however a more robust species than any of these and suffi- 

 ciently distinct from all its generic allies. With Mr. Walker I retain 

 for the present genus the name under which Hiibner arranged the 

 species in his " Verzeichniss," in preference to Aplecta Guen., as Hiib- 

 ner's Enrols perfectly corresponds to M. Gruenee's genus and has deci- 

 dedly priority. I have another undescribed species of Eurois, allied to 

 E. nimbosa and E. nebulosa, from the Rocky Mountains, but I cannot 

 make a proper description frcTm a single individual in indiflferent pre- 

 servation. 



Plusia aereoides, nov. sp. Plate 2, fig. 5. 9 • 



Anterior wings pale rose color, shaded with dark yellowish, median 

 lines straight, darker shaded. Basal line straight, succeeded by a 

 straight sub-basal line and dark yellowish shade. Transverse anterior 

 line straight ; median space large, roseate, with a posterior dark yel- 

 lowish shade which is broadest at internal margin. Reniform spot dis- 

 tinct, elongated, constricted ; median shade yellowish, visible at costa. 

 A similar spot to the reniform and approximately occupying the posi- 

 tion of claviform, is visible below the median vein, near the transverse 

 anterior line ; orbicular spot obsolete. Transverse posterior line straight, 

 sometimes very slightly bent, dark yellowish, distinct, followed by a 

 metallic band which is broadest at the internal mars-in and becomes 



