PEMPELIA FUSCA. 273 



As I obtained no more eggs, I think it best to 

 publish this history incomplete, as in the larva three- 

 quarters of an inch in length, there is, I think, little 

 doubt that adult markings had been quite or almost 

 attained. (George T. Porritt, 2nd September, 1882; 

 E.M.M., October, 1882, XIX, 110.) 



PEMPELIA FORMOSA. 



Plate OLIX, fig. 4. 



For examples of this larva I am indebted to Mr. F. 

 Franks and Mr. W. Machin, from whom I received 

 them on the 21st of July and the 19th of August, 

 1868. 



Their usual food appeared to be the leaves of elm, 

 though, in confinement, I found they would also eat 

 birch; and, when a fresh supply was given to them, 

 their first proceeding, before satisfying their appetite, 

 was either to spin two leaves together or to turn 

 down the corner of a leaf with a few threads ; under 

 this shelter they began to feed ; and in a day or two 

 a considerable number of threads would be spun, 

 agglutinating the leaves together in various direc- 

 tions. The earliest were full-fed by the 20th of 

 August, and the latest by the 15th of September. 



The full-grown larva is about five-eighths of an 

 inch or little more in length, tolerably cylindrical, 

 and, when looked at from above, of nearly uniform 

 bulk, but, viewed sideways, the three hinder segments 

 are seen to taper beneath towards the anal extremity; 

 all the segments are plump, and rather deeply divided ; 

 the head is rounded at the sides, and a little flattened 

 in front. 



The ground colour is a deep olive-green, much 

 freckled with darker green ; the usual dorsal and 

 subdorsal stripes are of this colour, each of them 

 being enclosed within two rather sinuous fine lines of 

 yellowish-olive ; another such line runs between the 



VOL. ix. 18 



