258 MEMOIRS NATIONAL ACADEMY OF SCIENCES. vol. xii, 



the outer end of the discal spot and the costal edge are two slightly marked scallops; the line 

 here is slightly incurved; more so in the West Nicaraguan and Honduras(?) examples; still 

 more distinctly incurved in the Texan, and also irregularly indented, and wanting the two 

 distinct scallops; in the Brazilian 9 the line here is more deeply and distinctly incurved, and 

 not subdentate or scalloped; behind the discal spot the line consists of 3 one-half scallops; 

 these not varying much in the different specimens. The line is white, indistinctly edged within 

 with blackish, and externally with a broad, distinct reddish orange-brown band, and beyond 

 this are no lilac and black scales such as occur in R. orizaba and lebeaui; the narrow submarginal 

 line as in R. orizaba, not formed of double scallops as in R. lebeaui. 



Hind wings with the discal spot large, oval in all the examples, the outer end entering 

 the white extradiscal line a little way. The clear discal spots are as large and wide as in any 

 species ; they vary somewhat in examples from different localities ; in the Honduras ( ?) c? they 

 are shortest, and longest in the Texas <? , and tapering on the outer end; most distinctly oval 

 in the Brazilian 9 . The extradiscal line with one well-marked scallop between the discal 

 spot and costa ; behind the discal spot it consists of three scallops, which are sharp, triangular 

 in the Honduras ( ?) 3 , rounded in the West Nicaraguan, Texan, and Brazilian examples. 



The marginal row of 15 black and red spots are as usual, separate in the Brazilian 9 , more 

 inclined to be all brick red. 



Beneath as above, with a faded hue. 



Expanse of the fore wings, <? 110-125 mm. ; $ 150-155 mm. 

 Length of one fore wing, <? 60-65 mm.; 9 70 mm. 

 Breadth of one fore wing, <? 31-33 mm. ; 9 35 mm. 

 Length of a hind wing, J 45-48 mm. ; 9 52-57 mm. 

 Breadth of a hind wing, <? 30-33 mm. ; 9 35 mm. 

 The Brazilian 9 appears to indicate a distinct climatic race, or else the Brazilian example 

 is the primitive form, and the Texas and Central American individuals belong to local or climatic 

 races. 



Geographical distribution. — Texas to Brazil; Texas, Clemens, Captain Pope's collection 

 (Museum Comp. Zoology, given by Clemens to John Morris) ; Honduras ( ?) (Doll) : Pulvon, 

 West Nicaragua (McNiel, M. C. Z.) ; Brazil, compared and agreeing with, with two examples 

 from Brazil in the British Museum. My identification of this species is based on the specimen 

 labeled "Attacus erycina Shaw " in the British Museum. Mr. Hulst at a meeting of the Brooklyn 

 Entomological Society ' ' mentioned that it had been proved by breeding that Attacus splendidus 

 and orizaba were identical." (Ent. Amer., I, p. 160, November, 1885.) This would seem to be 

 an error and to need confirmation. 



[Rothschild, in Novitates Zoologicae, XIV (1907), has described four subspecies of R. erycina: 

 Rothschildia erycina nigrescens. 9 . Tuis, Costa Rica. 



Central area of both wings much washed with black; the pinkish discal area 

 narrower than the space from this band to the margin of the wing; outside 

 this pinkish area, which on fore wing extends to the tip of the transparent 

 spot, there is a brownish black band, which extends forward to R, on hind 

 wing. Between this band and the margin the fore wing bears vandyke- 

 brown patches, followed by a drab band, while the hind wing has a row 

 of large black double spots, outside which there is a row of heavy black 

 bars; transparent spots smaller than in R. e. erycina. The underside shows 

 similar differences from R. e. erycina. 

 Rothschildia erycina martha. 9 . Onaca, Santa Marta. 

 Rothschildia erycina vinacea. <? , 9 . Peru. 

 Rothschildia erycina luciana. 9 . Sta. Lucia.] 

 [Mr. C. L. Pollard considers that R. splendida is a distinct species, and writes as follows 

 (litt., July, 1912) concerning it : "This has nothing to do with orizaba, nor is it a synonym of 

 erycina, as some have contended. It is found only at the Isthmus, apparently, my specimen 



