86 . MEMOmS OF THE NATIONAL ACADEMY OF SCIENCES. 



Boisduval, referring to a badl3" preserved specimen, remarks: "Les epines ou pointes sont 

 noires, assez longues et dentelees sur le second et le troisienie anneau; la collerette est aussi garnie 

 de pointes roides." 



GeograpJdcal dtstrihidiou. — Brazil (Donckier, Boisduval, Peters). It is not kno-vvn from 

 any other countrj^ than Brazil. Boisduval states that it is in certain years very common in 

 Brazil, while during others only a few caterpillars occur. 



A-DKLOCEPHAL^ AVABUII (Boisclvxval). 



(PI. XXXIII, fig. 2.) 



Othorene wardii Boisduval, Annales Soc. Ent. Be)gique, XV, 1872, p. 84, PI. Ill, fig. 2. 1872. — Burmeister, 



Descr. Phys. Rep. Argentine, Atlas, p. 46, Larva PI. XX, fig. .3. 1879. 

 Adelocephala irardi Kirby, Syn. Cat. Lep. Het., I, p. 741. 1892. 

 Olliorene wardii Fbiers, Heteroceren-Raupen, p. 10, Taf. Ill, fig. la, 1. (1898-) 1901. 



Larva. 

 (PI. XVII, fig. 3.) 



Burmeister, 1. c. Atlas, PI. XX, fig. 3, 1879. . 



Peters, Heteroceren-Raupen, p. 10, Taf. Ill, fig. 1; lo, pupa. (1898-) 1901. 



Imago. — 1 S , 19 • In the male the shape of the wings is as in A. hogei and more especially 

 A. hoi.siduvalii., Vjut the costa is still more straight, and the fore wings are more acute at the 

 apex, being a little longer and narrower than in either of the two species named. The 

 hind wings are of the subtriangular shape of those of ^1. hoisduvaUi and suhangidata, the apex 

 being well rounded and the outer edge very slightly excavated; the end of the abdomen is broad, 

 flattened, not laterally tufted; antenn;e broadly pectinated on the basal half. 



Thorax and fore wings of a beautiful, soft, hoary, purplish hue; the middle of the thorax 

 ocher yellow, the band widening toward the abdomen, the base of which is also yellowish. Fore 

 wings hoary lilac along the costa and in the middle and on the outer edge of the wing; on the 

 base of the wing behind the costal edge an ocherous patch, and another broad one near the outer 

 edge, ending on the internal angle. No definite transverse lines, but a broad ocherous region or 

 band extends from the two white discal spots to the apex, the apical portion of the costa being 

 ocherous; this ocherous band is mottled with purpli.sh. The two di.scal spots of unequal size, not 

 as in A. hogei, arranged in a line at right angles to the costal edge, but parallel with it. Hind 

 wings ocherous at base and on the outer edge, the rest of the wing dull, purplish. Beneath, the 

 wings of both pairs are purplish, marked with ocherous near the apex and along the inner edge. 

 Abdomen purplish, with yellow bands on the basal two-thirds. 



In the female the fore wings are broader, less acute at the tip, of much the same shape as in 

 A. iicolor ? ; the hind wings are not triangular, but of the normal shape, the apex being 

 rounded and the outer edge fidl and rounded. Tiiorax as in the <? , but the yellow median band 

 narrower. The wings of both pairs uniforndy clear, beautiful fawn brown or dark leonine, 

 without strigtB; the fore wings hoary and purplish violet at base, and along the outer edge a 

 single minute discal dot. Hind wings like the fore wings, with no markings. 



Expanse of fore wings, S, 72 mm.; 9, 52 mm. Length of fore wing, <J , 37 mm.: 9, 

 27 mm. Breadth of fore wing, ^,16n}m. ; 9,12 mm. Length of hind wing, ^.20 mm.; 9, 

 1.0 mm. Breadth of hind wing, ^ , 15 mm.; 9 , 13 mm. 



Burmeister states that the female is double the size of the male. It i.s very difl'erent. A 

 female in Strecker's collection is of the same color as Citheronia sepulcraUs. 



This is the most conspicuously marked .species of the genus, diflering from all the others 

 known to me in the beautiful, soft, frosty, purplish-brown tints, the more j-ellow shades, and in 

 the arrangement of the two oval, discal, white spots. 



Peters speaks of the remarkable sexual dimorphism of this species, the male with a ground 

 color of chocolate brown, but with large yellowish patches, as in my male above described. 



