( Ixxxix ) 



eggs. The larvte feed up and produce imagines in July : these 

 imagines again pair and lay, and produce the brood which 

 emerges in September and October and go into hybernation ; 

 the imagines which emerge in July being as a rule the var. 

 hiitchinsoni ; this I believe is the general idea, and is largely 

 correct, without doubt ; but not entirely so. I shall now make 

 two assertions as the result of my experiments for which I 

 offer ample proof : firstly, that the first 12 to 20 ova laid by 

 a hybernated $ in the spring are the only ova that produce 

 the var. hutchinsoni ; secondly, the var. hutchinsoni is the 

 only form which pairs and produces the second brood. The 

 first fact is beyond dispute. I have known it to be the case 

 for many years ; so has Mr. E. Goodwin of Wateringbury, 

 and I think several others who have bred the species. The 

 second assertion is open to question, and to establish the 

 correctness of it I will go back first to 1902, the original 

 year when I bred this species in quantity. 



"Early in the spring I had one 9 sent to me alive; from 

 her I obtained a nice batch of ova ; all the larvae fed up well, 

 and the first twelve imagines bred I placed in a cage with 

 growing nettles, all being the var. htotchinsoni. They paired 

 at once and laid a large quantity of ova ; the rest of the brood 

 were killed. 



"I next go to 1905, when again I had the species alive — a 

 good many ? ? s, but all captured late in the spring ; some 

 as late as June, when most of them had laid freely before I 

 received them. Now comes an impoi-tant point ; when the 

 imagines emerged in July I placed the first 40 (about equal 

 sexes) in my cage to pair; the same day one pair was i7i cop., 

 both of the var. hutchinsoni, but this was the only pairing 

 obtained : the remaining 38 specimens fed well for a few 

 weeks and then retired into the corners of the cage and went 

 to sleep though the weather during August and September 

 was very hot and sunny on most days. Occasionally they 

 came out of their corner to fly and feed, but very seldom. In 

 November most of them were still alive, but, through neglect 

 or some unknown cause, all died during the winter or early 

 spring, and two only lived till Maich 1906. 



"On the few sunny days of April this year (1908) hyber- 



