23 



Family 3. LYC^ENID^E 

 Genus 1. - THECLA 



T. Betulee. 



TIMES OF APPEARANCE. From the end of July to 

 the middle of September. 



HABITAT. Nice, in the Vallon Obscur ; also at 

 Saint-Martin-Vesubie, on the Chemin de Venanson 

 and the valley of the Madone, as well as various 

 other spots in the vicinity. 



Not uncommon in the autumn. 



OVUM. The eggs are laid in September, on the 

 twigs of the food-plant. 



" The egg is a depressed sphere, and white. "~^- 

 Newman. The caterpillar emerges in the spring, and 

 is full-fed by June. 



LARVA. On birch, blackthorn and the common 

 plum also, according to Milliere, on poplar and 

 hazel ; from June to August. 



On August 5 th 1890, I received a larva of Betulae, 

 which immediately began to pupate. 



The imago appeared in a week. 



Last season (1891), on June 20 th and 23 rd , I found two 

 caterpillars, one half-grown, the other full-fed, on a 

 bush of Prunus, off the road which leads to the village 

 of Venanson. 



The large one began to pupate, eleven days later. 



PUPA. It is not attached by silken threads, thus 

 resembling the chrysalis of T. Quercus, which also 

 does not attach itself by the head and tail and is by 



