10 GROTE AND ROBINSON. 



primaries outside of the external transverse band, and obsoletely irro- 

 rate. Fringes, pale ; thus differing notably from the dark fringes of 

 the primaries. Undersurface, rather pale brownish ochreous, obso- 

 letely irrorate ; a very broad dark brownish transverse band, resem- 

 bling that on primaries, becoming obsolete below first median nervule. 

 Externally, the wing is washed with rose color, but this brighter shade 

 is not continued along internal margin or over the angle. No discal 

 spot of any kind. 



The upper surface of secondaries interestingly resembles the under 

 surface of primaries, and vice versa; so that each wing reproduces. 

 on one of its surfaces, the approximate ornamentation of the opposed 

 surface of the other. This not uufrequently occurs among the species 

 of the present group. 



Expanse, 9 ) '^•^*-* inch. Lr.iKjth of hodi/, 2.00 inch. 



Habitat. — Mexico, (Mr. W. H. Edwards). No. " 130." 



Is readily distinguished from the Brazilian Adelocephala cadmus, by 

 the black discal spot of the secondaries above, as well as by the simple 

 9 antennae and a number of other less prominent characters. 



Adelocephala albolineata, Giote and Robinson. 



Adi locepliala albolineata, G. and R., Proc. Ent. Soe. Phil., Vol. 6., No. 1, p. 7, 

 Plate 1, fig. .i. (18()6). 

 Habitat. — Mexico. (Coll. Am. Ent. Soc.) 



Adelocephala bicolor, Grote. (Plate I, fig. 3, 9 ., 4, 9 reverse.) 



Dryocampa bicolor, Harris, Rt. Ins., Mass., p. 293. (1841). 



Drr/ocampa bicolor, Harris, Tr. Ins. Inj., Veg., (3d Ed.), p. 408. (1862). 



Dryocampa bicolor, Morris, Syn. Lep. N. A., Stti. Ins. p. 232. (1862). 



Ani.tota bicolor. Grote, Proc. Ent. Soc, Phil., p. 63. (June, 1864). 



Hphiiujicampa distigina, Walsh, Proc. Bjst. Soc. Xat. Hist., p. 290. (Febru- 

 ary, IS64). 



Dryocampa bicolor, Walsli, 1. c. p. -03. (February, 1864). 



Dryocampa bicolor, Paekd.. P:i>c. E it. Soc, Phil., Vol. 3, p. 384. (Deeem- 

 bi-r, 1864.) 



Habitat. — Atlantic District. 



This species varies in the ground color of the wings becoming more 

 reddish than in the specimen we figure. Such an individual was taken 

 by Mr. (Irote in Arkansas, and is now in the possession of Dr. Packard. 

 .Vlthough moagre, Harris' description evidently refers to this species, 

 in which the 9 antcnnfe are slightly pectinate at base. Mr. Walsh's 

 error in erecting two genera and species on individuals generically iii- 

 .leparable and specifically identical, has been elsewhere sufficiently ex- 

 l)09ed. In regard to a critical study of all the species of this Tribe, 

 it has already been remarked, that we must be prepared for slight dif- 



