XANTHIA CITBAG0. 73 



Ground colour of the dorsal surface dark olive-grey ; 

 head smooth and shining, the upper part pale brown, 

 the lower dark sienna-brown. Medio -dorsal line dirty- 

 white ; subdorsal lines similar in colour, but narrower 

 and less distinct ; spiracular region dull whitish grey. 

 On the second segment, just behind the head, is a 

 semicircular black mark, divided by the medio-dorsal 

 line ; above, and bordering the subdorsal lines, is a 

 conspicuous series of longitudinal black marks, having 

 the appearance of interrupted black stripes. Trape- 

 zoidal dots distinct, white. Spiracles enclosed in a 

 black mark, very minute, greyish white. Ventral 

 surface and pro-legs uniformly dirty green, the skin 

 semi-translucent ; legs black and shining. Shortly 

 before spinning up, the ground colour of the dorsal 

 surface changes to yellowish brown. Feeds on lime. 

 The cocoon is formed by drawing closely together 

 several of the growing leaves, and the larva remains 

 inside for two or three weeks before assuming the 

 pupa state. The moths from my larvas appeared at 

 the end of July. (Geo. T. Porritt, November 11, 

 1872 ; Ent., VI, 257, December, 1872.) 



Xanthia cerago. 

 Plate LXXXIV, fig. 5. 



[Mr. Buckler published his descriptions of the larva 

 of this species along with those of the larva of 

 X. flavago (silago), under the title of ' Comparative 

 Notes on the Larvae of Xanthia cerago and silago,' as 

 follows : ] 



Not until the season of 1869 have I had a good 

 opportunity of really knowing the difference between 

 these two species in the larval state, and for this 

 reason : I never till then had both at the same time, 

 but only one or two of either at long intervals, so that 

 in my recollection they had somehow got to be so 

 much alike as not to be known the one from the other. 



