54 METAMORPHOSES OF 



with a loose web, and can be readily moved from one place to 

 another by the caterpillar. 



Pupa. 



When fall-fed the caterpillar closes up the ends of the 

 case with silk, and undergoes pupation. 



Imago. 



/a, Full-fed, March 26 ; Imago, Oct. 12, 1878 = 



200 days. 

 h, Full-fed, March 26; Imago, Oct. 17, 1878 = 

 205 days. 



Specimens in my possession were full-fed at the end of 

 March, 1878, and produced the moth in October, as above 

 stated. 



IX. — Perophora externa. 



Perophora externa, u. sp. Male and female. Brownish grey ; forewing 

 with a transverse antemedial pale ochreous-brown angulated fascia, which 

 also crosses the base of the hindwing ; a very oblique postmedial blackish- 

 brown line which extends to near apex, and is then acutely bent inward to 

 the costa ; this line is outwardly bordered by ochreous-brown, and followed 

 by a submarginal brown fascia ; at end of the cell is an elongated hyaline 

 spot : hindwing with a medial transverse blackish line, continued from 

 that on the forewing, and broadly bordered outwardly by brown. Body 

 brownish-grey. Expanse <? Ij, ¥ 2 inches. 



Nearest allied to P. orthane and P. vittata, Walker. It is quite distinct 

 from P. sanguinolenta, Felder. — F. Moore. 



fa, Cases of larvae fixed for pupation, San Paulo, 

 Larva. J Jan., 1878. 



\h, Full-fed. San Paulo, Dec. 11, 1877. 



This caterpillar lives in a hard hammock-like case formed 

 of the excrement, joined together with silk and mucilage. 

 The case is suspended from the twig on which it feeds by 

 silk threads, and is generally slung in a more or less vertical 

 position, so that the curved end protects the upper opening 

 from rain. Both ends of the case are alike, and the cater- 

 pillar puts his head out at either end with equal facility. 



