AGRIADES CORIDON. 275 



of the stages 41 days, or under six weeks. The resultant imago proved 

 to be a rather small female, expanding 51mm. 



I presume C. erate at Sarepta has four broods during each year ; 

 there was certainly a numerous brood of imagines flying in early May, 

 judging by the condition of the specimens at the date of my arrival 

 there, May 20th. There was a second brood emerging during the last 

 few days of our stay, June 17th to 23rd, and I think there would be a 

 third brood during late July or in early August and a fourth in 

 September. Presumably this species is a true hibernator, and not as 

 in C. edum successively brooded during the winter, because the 

 winters at Sarepta are very severe, with snow on the ground for many 

 months, as I believe they are throughout the whole of its known range, 

 and it does not seem possible for a larva to live and feed under these 

 conditions. 



Agriades coridon. The new asymmetrical forms from the Herts 



district. 



By C. P. PICKETT, F.E.S. 



I am very pleased to see that at least one of our leading authorities 

 has taken up this new and interesting asymmetrical form of A. cnruhm. 

 I was one of the first to call attention to this interesting form, and 

 believed it to be more than an ordinary asymmetrical form. Now we 

 are working it up we already find at least something new regarding A. 

 coridon, I do not think it should be placed under the heading of " ab. 

 inacqiialis : " it is quite a distinct form from the aberration which the 

 late J. W. Tutt named ab. inat'(iiialix. His description surely meant 

 the usual form where the blue was either streaked or splashed on one 

 side more than the other. For this present form a more appropriate 

 name would be"ab. roystouensis.'' On reference to Tutt's British But- 

 terjiies, p. 167 (1896), his description reads as follows: ■' ab. inaequalis, 

 n. ab. = with blue streaks, sometimes varying on opposite wings of the 

 insect." Personally I have not come across these asymmetrical ? s 

 before during over thirty years keen collecting of the blues, and do not 

 remember seeing or hearing of any others being taken anywhere. 

 They only seem to have occurred on this particular Herts ground. I 

 can trace them back the past five seasons, but have not noticed them 

 on this ground before this, no doubt they were there, but being keen on 

 ab. seiiiifii/niirap/ia, one was apt to overlook them ; now that the seiui- 

 sywirafiha fever has worked ofl' all attention is given to this new form. 

 Strange to say all these asymmetrical forms that I have taken (with 

 the exception of three) are more or less heavily blue scaled on the 

 smaller wings, and appear as if the blue were dusted on. I took one 

 specimen, however, with the whole of the four wings dusted in this 

 way, even to the edge of the wings, but curiously enough this was not 

 an asymmetrical form, but one rather smaller than the usual type. I 

 have three asymmetrical forms without any trace of blue whatever, two 

 being with right hand side wings largest, and ab. auvantia, Tutt 

 (marginal orange spots), the left and smaller side being typical coridon, 

 the other specimen is of a curious shade of greyish- brown, the small 

 side being typical coridon and largest side showing faint marginal 

 orange spots edged internally with whitish-blue crescents. 



The most striking point of A. coridon from Herts is the great 



