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DESCRIPTION OF 

 LARVA OF MACROMPHALIA RIVULARIS, Butleu. 



By W. Bartlett-Calvert. 



Larva. — Length one and three-quarter inch, of a slaty 

 colour, and covered with fine hair ; head of same colour, with a 

 lemon-yellow V-shajjed mark in the front, filled in with black ; 

 the 2nd segment has wart-like appendages at side of a deep 

 rose colour, and terminate in a bunch of cream-coloured hair. 

 From 2nd segment a double streak, of an ochre-yellow colour 

 bordered with black, runs along the back to anal claspers, and 

 has in the centre of each segment a reddish patch, from the fore 

 part of which protrudes a small tuft of white and black hair, 

 which on the 2nd, ord, 4th, and 12th segments are much longer 

 and more bushy than the rest. 



From the wart-like appendages on 2nd segment a narrow 

 stripe of a reddish ochre colour runs along the side to anal seg- 

 ment, and on the 3rd and 4th segments, between the lateral and 

 dorsal stripes, are often two creamy patches, but they are not 

 constant. Spiracles black, enclosed in a creamy-coloured spot, 

 with a black dash below, under which dash is again a creamy 

 tuft of hair. Under surface of a dirty white, with a broad 

 reddish ochre-coloured band running from the head to the anus 

 between the prolegs and claspers. Prolegs red, banded with 

 black ; claspers steel-blue. 



Feeds on espino {Acacia cavenia). Full-fed by the end of 

 December, spinning up in a long tapering bufl'-coloured cocoon 

 on the slender branches. Moths emerge from January to end of 

 February. 



Habitat, Chili. Vide ' Transactions of the Entomological 

 Society of London,' 1882, p. 12. 



Colegio Ingles, Santiago, Chili, 



