106 L1THOSTEGE NIVEARIA. 



This last variety caught the eye, when upon its 

 food, readily enough, but the other two were hard to 

 distinguish from the seed-pods of the mustard plants. 

 (John Hellins, 16th September, 1867; E.M.M., 

 October, 1867, IV, 115.) 



Larvae of Lithostege nivearia. — My specimens were 

 full-fed and went underground on the 23rd of July ; 

 examined on the 28th I found they had buried them- 

 selves to the depth of two inches, as far as the vessel 

 in which they were confined would allow, and had 

 become shorter and stouter, the colour having changed 

 and assumed a regularly annulated appearance. On 

 the 1 st of August I turned out and examined the earth, 

 being anxious to describe the pupa. I found they had 

 undergone their transformation; each had formed a 

 neat little cell in the earth, but without any admixture, 

 so far as I could perceive, of silk ; the head-case of 

 the pupa forms a small and slightly projecting knob ; 

 the case of the prothorax, or perhaps tippets, is also 

 knob-like on the back ; the wing-cases are of medium 

 length, and the wing-rays are rather strongly marked ; 

 the surface is rather deeply and confluently punctured, 

 giving the pupa a dull appearance, which I mention in 

 contradistinction to the glabrous exterior so commonly 

 observable in pupa3; and there is a deep medio-dorsal 

 puncture on the fifth, sixth, seventh, and eighth seg- 

 ments, and each of these deep punctures is surrounded 

 by a glabrous space ; the abdomen terminates in two 

 very acute and moderately long divaricating spines. 

 The colour of the wing-cases is dull greenish and 

 semi-transparent, and that of other parts dull pale 

 brown. (Edward Newman ; Entom., September, 

 1871, V, 379.) 



