OF NORTH AMERICA. 149 



is an obtuse prominence or elevation of the anterior part of the eleventh 

 segment, which is visible at all times." This larva feeds on the vine, 

 devouring the entire leaf, and is found from May to September (Riley). 

 It undergoes its transformations on the surface of the ground without 

 making a cocoon, according to the last authority. For more detailed 

 description of the larva of this species, as far as its structural peculiari- 

 ties are concerned, the reader is referred to the quotations from Dr. 

 Packard's writings under the genus Etidrvas p. 145. It should 

 be noted, however, that this writer describes the larva as hairy, while 

 Dr. Harris says it is " entirely naked.'' Mr. Riley (loc. cit. ) remarks 

 that the hairs arising from the black spots are less conspicuous than in 

 the larva of Alypia ociomaculata. From this it would appear that the 

 hairs must have escaped the notice of Dr. Harris, though it is difficult 

 to understand how so close an observer was led into this error, for such 

 I am inclined to believe it, though personally unacquainted with the 

 larva. For the pupa, see p. 146. 



Some of the larvae which pupate early disclose the moth in the au- 

 tumn, but others pass the winter as pupae and do not appear on the 

 wing until the following spring. (Riley.) 



2.-ETJDIIYAS UNIO. (Pi. 7, fig 2,) 



Eiiihisanotia unio, Hiibner. 



Eudryas iinio, Boisd. , Spec. Gen. Lep. vol. i. (1836.) 



Eudryas unio, Harris, Ins. Inj. Veg. p. 310. (1841.) 



Eudryas unio, Walker, Cat. Lcp. B. M. vol. 9. (1856.) 



Eudryas unio, Morris, Syn. Lep. N. Am. p. 246. (1862.) 



Eudryas unio, Proc. Ent. Soc. Phil. p. 43. Pupa. (1864.) 



Eudryas unio, Riley. 2nd Rep. St. Ent. Missouri, p. 'i^. (1870.) 



5 . ? . — Head and prothorax dark purplish brown, with many me- 

 tallic scales. Palpi paler. Patagia white. Thorax white, with a broad 

 median stripe concolorous with prothorax. Abdomen whitish above> 

 yellowish beneath, with an indistinct row of lateral black spots. 



Anterior wings white, with an outer broad marginal band, sinuated 

 internally, and colored as follows in lines parallel with the outer mar- 

 gin. An outer sinuated whitish line, the outer indentations of which 

 are filled with reddish brown. The inner margin of the band consists 

 of a very narrow pale olive green line margined on both sides very 

 narrowly with blackish brown ; the centre of the band is whitish dusted 



