no i. BOMBYCINE MOTHS OF NORTH AMERICA— PACKARD. 7 



Larva. — Peters figures the caterpillar of this species, which has four short thoracic and a 

 conical caudal horn ; one would infer from his brief account that this larva was fully fed, since 

 he figures the pupa, but it may be found to belong to the penultimate stage. He states that 

 it is gray, marked with brown. It was found only once by Peters on a large forest tree with 

 leaves like the hazel. It became well known to him in Petropolis, where it lives on a high 

 stemmed Melastomaceous tree. 



Pupa.— As figured by Peters the body is rather thick, with a cremaster of moderate size, 

 and not differing in general appearance from that of A. armida. 



Geographical distribution. — Brazil (Herrich-Schaeffer, Walker). Peters states that it is 

 very rare and only found in the high mountain region. 



ARSENCRA SYLLA (Cramer). 



Phalxna-Attacus sylla Ckamer, Papillons Exotiques, III, p. 79, PL CCXLA. 

 Rhescyntis sylla Hubner, Verzeichniss bek. Schmett., p. 156, 1818, 1779 (?). 

 Rhescyntis sylla Walker, Cat. Lep. Het. Br. Mus., VI, p. 1325, 1855. 

 Arsenura sylla Ktrby, Syn. Cat. Lep. Het., I, p. 769, 1892. 



This species is larger, but approaches A. armida in the shape and markings of the wings, 

 though sufficiently distinct. The extradiscal lines on both wings are in general similar, but 

 flesh-colored, and accompanied by a grayish scalloped shade on both wings. A more decided 

 oval discal spot; no basal line present. The apical marks on the fore wings somewhat as in 

 A. armida. 



■Geographical distribution. — Surinam (Cramer) ; Para (British Museum). [Jordan, Nov. 

 Zool., 1911, describes A. sylla pelias, placing it in Rhescyntis.] 



ARSENURA BATESH Felder. 



Arsenura batesii Felder, Reise der Novara, PI. XCI, fig. 2, 1874. 

 Rhescyntis batesii Preuss, Abbild, Nachtschmett., p. 7, Tab. 12, fig. 3, 1888. 

 Arsenura batesii Klrby, Syn. Cat. Lep. Het., I, p. 769, 1892. 



Imago. — -This is a larger species than A. armida, with rather deeply scalloped wings, espe- 

 cially the hinder pair, but the markings are of the same type, though the discal spot on the 

 fore wings is connected with the basal line, making a large oblong inclosure, and the discal 

 spot on the hind wing incloses a small oval space. The extradiscal line is more scalloped than 

 in my Mexican example of A. armida. 



Geographical distribution. — Brazil. 



ARSENURA PONDEROSA Rothschild. 



Arsenura ponderosa Rothschild, Nov. Zool., II, p. 48, 1895. 



Imago. — -"This curious species is quite unlike any other of the genus. 



"Fore wings, ground color clay yellow washed with yellowish buff. Wings crossed ob- 

 liquely from the apex to near the base of the inner margin by a broad blackish brown line, 

 which is wavy and less conspicuous in the apical half. This line runs parallel with the costa, 

 and not at an angle with it, as usual ; within the cell is a half -moon-shaped broad but indistinct 

 line, and a narrower but more irregular one at the apex of cell. The outer half of both wings 

 is crossed by two transverse and parallel broad lines. The outer one bears on the fore wings 

 four buff patches, of which the anterior one in front of the upper median nervule is much the 

 largest and almost square. The space between these two lines is narrower than between the 

 outer one and the margin, and is decidedly yellower. 



"Hind wings similar to fore wings, but the outer line is double, gradually merging into 

 one toward the anal angle, when it exhibits a yellow patch. 



"Head and collar brown, with a white mark between the antennae. 



' ' Thorax and abdomen pale buff. 



"Underside pale buff, the oblique band on fore wings wanting, and the two transverse 

 bands much less distinct, the outer one nearer margin, and dissolved into blackish and ruddy 



