PTEROPHORUS ISODACTYLUS. 347 



being more yellowish and less greenish. One indivi- 

 dual was flesh-coloured as far as the seventh segment, 

 the remainder being of a pale faintly ochreous greenish 

 yellow. One of these larvae, apparently full-fed, has 

 slightly drawn the top of a leaf together, and in the 

 corner thus formed has spun a web. 



The moths — three in all — appeared from the 6th to 

 the 16th of June, 1872. (William Buckler, 16th June, 

 1872; Note Book I, 122.) 



Pterophorus trigonodactylus. 



The larva of Platyptilas gonodactylus is fully half an 

 inch in length, stout, attenuated towards both extre- 

 mities, subtranslucent, slightly hairy ; the ground 

 colour is pink. The head is small, shining, black ; 

 the corselet is dark, broad, rhomboid al, with two black 

 dots below it placed longitudinally ; the third and 

 fourth segments are dilated, and a ring of various- 

 sized spots is on each, the following segments having 

 a ring of spots, and an additional spot on the hind 

 subdorsal region ; the anal plate is small ; the dorsal 

 line is broad, pink ochreous-brown, darker and nar- 

 rowed on the last segment ; the subdorsal the same 

 colour as the dorsal line; the subspiracular line is 

 wavy; the spiracles are distinct, black; the feet are 

 black. 



The larvae feed in the young flower-shoots of Peta- 

 sites farfara in April, causing them to be stunted and 

 droop ; they leave these stems, and enter more 

 advanced flower-stalks, towards the end of April, a 

 little below the flower-head, and live beneath the 

 seeds, eating them from below; or they enter a well- 

 grown flower before it is open, causing it to burst on 

 one side, and take their place amongst the seeds as 

 soon as they have eaten out a home to live in ; they 

 appear in the perfect state in May. 



I have gone fully into this description, because I 



