146 GONEPTBRYX RHAMNI. . 



leaf, which I picked, had two eggs on the under side 

 and one on the upper ; the shape of the egg is flask- 

 like, cylindrical, set on end, about 1*3 mm. high, *4 mm. 

 in diameter at the base, '5 mm. at the widest, narrow- 

 ing to *15 mm. at the top ; the shell is very delicate 

 and glistening, with twelve longitudinal ribs or flutings, 

 and fine intermediate parallel lines ; colour silvery green 

 at first, turning at last to yellow. The larva makes its 

 escape from the egg by a large irregular hole in its 

 side, leaving the neck and top perfect, and does not 

 eat the empty shell. 



The newly-hatched larva is nearly 2 mm. long, the 

 head being the widest segment, and the body tapering 

 backwards to the tail ; the skin shining, in colour dull 

 yellowish, sparsely sprinkled with tiny black dots, but 

 there is a dorsal line of the ground colour left clear of 

 these dots ; the usual trapezoidal and lateral warts are 

 blackish dots, but distinguishable by having a clear 

 space round each ; and each bears a short pellucid 

 knobbed bristle. In five days' time the larva is 4^ mm. 

 long, the body has become green, but the head has a 

 yellowish-brown tinge, the whole surface of the back 

 set with tiny black dots; but the trapezoidal and lateral 

 warts are larger black dots surrounded by clear spaces. 

 After the moult on the eighth or ninth day the length 

 is 8 mm., the head is green set with black dots, the 

 rest of the description much as before. After the next 

 moult the length is 15 or 16 mm., the colour becomes 

 a fuller green, the white spiracular line appears, the 

 trapezoidal s still have clear surrounding spaces, there 

 are more black dots, and some more bristles. The 

 length just after the last moult is 20 mm. ; the full- 

 grown larva is 34 mm. long, in shape having the back 

 rounded but the ventral surface more flattened, the 

 body stoutest from the third to sixth segments, the 

 second tapering rapidly to the head, which is rounded, 

 the hinder segments taper gradually, the thirteenth 

 rapidly, the anal flap ends squarely ; the six subdividing 

 rings of each segment well defined, the subspiracular 



