146 



THE ENTOMOLOGIST S RECORD. 



caterpillar stage and consisted of two families, which emerged respectively at 

 the beginning and in the middle of June 1918. 



Eugonia polychloros emerges from the end of June to July 15th, and the II. gen. 

 emerges in a very graduated way during the whole winter from September onward, 

 but chiefly in February and in the early half of March. 



Polygonia egea emerges in a graduated way from the end of May to the 

 middle of July, and the II. generation consists of two lots, one of which emerges 

 in the autumn from the first days of September onward (these individuals are to 

 be seen in September, but are never on the wing during the winter, and only appear 

 again in March), and the second one emerges in the spring, in March, and as late 

 as April 15th. 



P. c-alhum emerges the later half of June and as late as the beginning of 

 August ; the II. gen. emerges from the end of August and, after hybernation, the 

 butterflies fly in February and early March. 



Trigeneratas. 



[Within the comparatively limited times of emergence of each 

 generation these species all tend to the graduated type and may be 

 considered as graclnariae. Loweia dorilis, Hufn., and Limenitis rivularis, 

 Scop, [caiuilla), are the only exceptions amongst the species mentioned 

 below. There are, however, notable differences between the various 

 generations, the II, generally being the shortest, and the III. the most 

 graduated.] 



Group of species which do not show constant differences in the coinjyarative 

 importance of the three (jenerations (aeqnegeneratae). 



I., (end of October), March 10th to May; 11. , June; September 

 (nucleus 6th to 10th). — Pararge megera, L. 



I., April to May ; II., beginning of July ; III., end of August. — 

 Iphiclides [=:Cosmodesnins) j)odalirins, L. 



I., March 10th to May; II., June; III., September. — Mancipium 

 [Pieris) brassicae, L., Pieris rapae, L. 



Gen. I., primaria, 



I., March 15th to May ; II., June ; III., August to September. — 

 Pararge aegeria, L. 



L, end of March to April 15th; II., June; III., August to 

 September. — Lycaenopsis [ = Celastrina) argiolus, L. 



I., April to May 20th ; II., July to August 10th ; III., September 

 1st to 15th. — Aricia medon, Hufn. 



I., April to May; II., June ; III., August to September. — Leptosia 

 (Leptidea) sinapis, L. 



I., October to May (nucleus, April 1st to 10th) ; II., June 15th to 

 30th ; III., August to beginning of September. — Gonepteryx rhainni, 

 L., G. clenpatra, L. 



Gen. I. vel II., primaria. 



I., March 10th to May ; II., May (at the same time as the end of 

 I. gen.) to June (nucleus, towards the middle of June) ; III., September 

 15th to October 15th. — Pieris napi, L. 



Gen. II. vel. III., p)rimaria. 



I., March 10th to May (nucleus, April 15th to 30th) ; II., June to 

 July 20th (nucleus, June 15th to 26th); III., August to September 

 (nucleus, September 10th to 20th). — Pieris manni, Meyer. 



