GONEPTERYX EHAMNI. 147 



lateral ridge rather sharply edged; the second and 

 third pairs of true legs are set upon stout bases, the 

 ventral prolegs also powerful ; the colour of the back 

 is a uniform dull glaucous green, melting at the 

 spiracles into a greyish-white broad stripe, which 

 reaches to the subspiracular ridge and is there pure 

 white, except on segments 2 to 4 where it has a 

 yellow tinge; the spiracles inconspicuous, being yel- 

 lowish-white ; the belly of a more tender green than 

 the back, but becoming glaucous down the middle ; 

 the head and all the back finely set with tiny black 

 dots of uniform size, each emitting a short pale bristle ; 

 on the pale stripe the dots are whitish, below this the 

 dots are dark, but not so black or so numerous as 

 on the back. As the larva matures the trapezoidals 

 become indistinguishable, and the pulsating dorsal 

 vessel becomes visible as a faintly darker line. 



For pupation the larva fixes itself head upwards, 

 with a belt of silk round the body, and then bends the 

 body in a curve outwards ; but I never saw the actual 

 change. 



The pupa, the difficulties of whose description Albin 

 got over by calling it " odd-shaped," is about 25 mm. 

 in extreme length, and 9 mm. in width across the wing- 

 cases ; the general outline is pointed at either end, the 

 back of the thorax humped in a short curve, the abdo- 

 men rising again a little from the waist, and con- 

 tinuing nearly straight to its tip, with a very slight 

 keel along the centre; the shoulders angulated, a 

 lateral ridge thence to the anal tip; the wing-cases are 

 produced in front to a narrow edge until quite half 

 their depth projects beyond the line of the belly, from 

 this projection the abdomen curves gently to its tip, 

 which is a bluntly-triangular spike, flattened, the 

 ventral side covered with curved spines (none on the 

 back); the tongue-case forms the edge of the projecting 

 wing-cases, but stops some little distance before reach- 

 ing the abdomen. The colour of the pupa generally is 

 a bluish-green, the wing-cases more grass-green, the 



