ACHK0IA GRISELLA. 203 



Length about five-eighths of an inch, and of mode- 

 rate bulk in proportion ; the head is polished, has the 

 lobes rounded, and is slightly narrower than the 

 second segment; the body is cylindrical, of almost 

 uniform width throughout, but tapering a little 

 towards the anal segment; there is a polished plate 

 on the hinder part of the second segment ; the skin is 

 soft and semi-translucent, the segmental divisions 

 well defined. 



Ground colour, both dorsally and ventrally, greyish- 

 white, through which the internal working of the 

 muscles shows, of a purple shade; a dark purplish 

 pulsating vessel forms the dorsal line ; the head is dark 

 brown ; the frontal plate is of the same colour behind, 

 but paler in front ; the spiracles are minute, very 

 dark brown ; when the larva is at rest, the segmental 

 divisions appear white, from the overlapping of the 

 skin, but this is not observable when it is crawling. 



Those I had last year, 1878, produced imagos about 

 the middle of July. (George T. Porritt, 17th May, 

 1879; E.M.M., June, 1879, XVI, 21.) 



Anerastia lotella. 

 Plate CLYI, fig. 4. 



1 am greatly indebted to the kindness of Mr. 

 Charles G. Barrett for the opportunity of figuring 

 and describing larvae of this species, as well as their 

 cases and cocoons, brought back by him from his visits 

 to the coast of Norfolk (see E.M.M., VII, p. 63). 



The larva of this species resides in a tubular case of 

 considerable firmness, made with grains of sand spun 

 together ; the specimens of cases that I had were 

 irregular in form, and varying in length from If to 2f 

 inches ; the anterior portion of the case is rather 

 attenuated at the mouth, but increases from thence in 

 diameter to one-eighth of an inch, and occupies about 

 a third (in some instances half) the entire length of 



