PTEROPHOliUS Till GONOD ACT YLUS. 349 



head and second segment fulvous." Here, then, is 

 either discrepancy or descriptions of the larvae of two 

 very closely-allied species, sufficiently distinct as 

 larvse, but not easily separated as imagines. I have 

 no reason to doubt the accuracy of Mr. Peers's obser- 

 vations, as recorded, more especially as all the 

 imagines bred from my larvae were of the same pale 

 colour, and uniform in the character of the apex of 

 the anterior wings, in both respects differing from the 

 examples of P. trlgonodactylus which I had usually 

 taken in the imago state in other parts of England. 

 (Richard South, 17th January, 1882; Entom., 

 February, 1882, XV, 32.) 



The young larva feeds in the shoots of its food- 

 plant, Tussilago fqrfara, until the flower-heads are 

 thrown up ; then these are attacked. Sometimes the 

 larva will crawl up the outside of a flower-stem and 

 enter the head just above the receptacle, but more 

 often it ascends by way of the interior. In this latter 

 case it does not feed in the stem, but makes its way 

 direct to the head. When nearly full-fed the larva 

 generally enters a head which has passed or is about 

 to pass into the fruiting stage. It then proceeds to 

 arrest the ripening process by eating away the inner 

 fleshy part of the stem a little below the receptacle. 

 This causes the head to droop until it comes in contact 

 with the scape, against which it hangs in such a 

 manner as to attract the attention of anyone hunting 

 for the larva. When full-fed it makes a chamber 

 among the seed-down, and enters the pupa state. In 

 causing its domicile to become inverted, the larva not 

 only secures its food in a palatable form, but exhibits 

 wonderful foresight in providing a weather-tight 

 apartment for its pupal condition. (Richard South, 

 Entom., July, 1882, XY, 145.) 



