no. i. BOMBYCHSfE MOTHS OF NORTH AMERICA— PACKARD. 261 



It differs in this stage from the larva of R. orizaba in the abundant hair-like setae on the 

 lateral ridge, and in the red spots on the suranal plate and side of the anal legs. In its arma- 

 ture it differs from that species. 



Cocoon. — Oval, not much larger at one end than at the other; the stalk very slightly 

 developed. Length 53 mm., thickness 21 mm. 



Pupa. — Of the form of cynthia, but not so thick; of the usual chestnut brown color. 

 Length 28 mm.., thickness 13 mm. 



ROTHSCHTLDIA JA.COBMJE AMAZONIA (Packard). 

 Plate LXIV, fig. L 

 [Attacus] amazonia Packard, Rep. Peabody Acad. Sc, 1869, p. 85. 



On further examination of the type of my description it seems to be a form of R. jacobese. 

 It differs from an example of R. jacobsese from Rio Grande, Brazil, and three others presumably 

 from the Brazilian coast, in the following respects : 



The fore wings are much elongated toward the apex, and much more falcate, being broadly 

 and deeply excavated on the outer edge of the wing. The discal spot is narrow and elongated, 

 the inner end acute, and much prolonged, the outer end passing through or interrupting the 

 extradiscal line; the latter line is more deeply scalloped; the costo-apical cle&r reddish space, 

 so distinctive of R. jacobsese, is in amazonia still longer. (The subapical spots are rubbed off.) 



The discal spots of the hind wing are larger, broader, more oval, than in R. jacobsese, not so 

 sharp, much fuller and rounder at the outer end. The abdomen is marked by two white longi- 

 tudinal lines as in R. jacobsese, these lines not occurring in any other species examined by me 

 and thus apparently diagnostic of the species. 



In the shape of the wings this type is very close to Felder's Attacus satyrus, only differing 

 in markings in the somewhat broader discal spot of the hind wings, while that of the fore wings 

 is a little longer. 



This may prove to be a local race. It is distinguished from jacobsese by the very long and 

 narrow fore wings, and the long broad discal spots of the hind wings. 



Geographical distribution. — Collected by Prof. James Orton at Pebas, about 2,000 miles 



from the mouth of the River Amazonas. The type is in the Museum of Harvard University, 



Cambridge. 



COSCLNOCERA Butler. 



[Cosrinocera Butler, Proc. Zool. Soc. Lond., 1879, p. 163.] 



Rothschild (Nov. Zool., II, 1895) recognizes only one species, C. hercules (Misk.) from 

 Queensland and New Guinea. C. omphale Butler [New Ireland] is a synonym of C. hercules. 

 An example from German New Guinea, with all the ocelli much smaller, and nearer the base 

 of the wings, is described as ab. butleri Roths. [More recently (Nov. Zool., VI (1899), p. 70) 

 Rothschild has added a form named C. hercules heros Roths.] 



Of the species of Attacus, this remarkable tailed form C. hercules approaches nearest 

 A. crameri F elder from Amboina. The body and antennae, the fore wings in their shape and 

 markings, are very much like the Amboina species, while the wing in Coscinocera, however, lacks 

 the subapical ocellus, unless a slight vestige is left, but has retained the zigzag diffuse white 

 line. The discal spots are much as in A. crameri, being triangular, small and with a whitish 

 triangular center. 



The chief generic difference lies in the very long tails of the hind wings, which are fully as 

 long as the main part of the wing itself; they are narrow and slightly bent outward near the 

 end. The female differs much, according to Oberthur, from the male. 



Geographical distribution. — All the species belong to the Notogaeic realm, Cape York, and 

 islands north and east of New Guinea. 



This genus is evidently an offshoot from a crameri-like Attacus, and it may be questioned 

 whether the tails are not the result of some sport, which has become fixed by heredity. A. 



