The majority became pupx during June and the first week of July, 

 but a few larviie appeared to remain stationary when about half 

 grown, and these, I assumed, would go over till the time of the late 

 emergence. I managed to so far confirm this that three or four of 

 them fed on until early in August and then pupated, but unfortunately 

 the pupje died. 



The moths forming the first emergence came out between July ist 

 and 24th, probably about a fortnight or three weeks behind the time 

 when that brood would be on the wing on the sunny banks at East- 

 bourne ; but as I have unfortunately had no opportunity of visiting 

 that locality at that season of the year, I am unable to verify the 

 time at which that brood appears.* 



I succeeded in getting a pairing between moths which emerged on 

 July 6th and 7th, and obtained from them a good batch of eggs, 

 which hatched on the i6th of that month. The larvte fed up almost 

 entirely on knotgrass, yarrow, and tormentilla, with which also they 

 were kept constantly supplied, being hardly touched by them. They 

 were kept as much in the sunshine as I dared to keep them at this 

 time of the year, without letting their food become dried up unduly. 

 Under these conditions they fed up rapidly (except about a dozen 

 which remained about half grown, and are now — February, 1902 — 

 safely hybernating),t and commenced to spin their cocoon on August 

 1 8th. The moths appeared between September 6th and 19th. 



On August 17th I went to Eastbourne, and on that day found the 

 moth fairly commonly in its usual haunts, just three weeks earlier 

 than the first individual emerged in confinement. 



Briefly, then, the complete life cycle of the species appears to be : 

 Ova deposited in August and early in September hatch within a 

 couple of weeks; the larvs hybernate and produce moths in the 

 following June, except a small proportion which feed slowly, and do 

 not produce moths until some two months later. Ova from the 

 moths of the June emergence hatch in some ten or twelve days ; the 

 majority of the larv?e feed up rapidly and produce moths in August 

 and early September, at the same time as the slow-feeding individuals 

 of the hybernated larvae ; but of this brood also a small proportion 

 remain as larvae, and so pass through the winter, arriving at the 

 imaginal stage at the same time as the offspring of the later brood. 

 These remarks must, however, be taken as applying only to the species 

 as found on extreme south coast; further north it is probably but single- 

 brooded, the imagines being on the wing late in June and in July. 



The species being not quite completely double-brooded in the 

 south, appears to suggest the probability of the double-broodedness 

 being an acquired habit of recent institution, the few larvae remaining 

 over from each brood, thus taking the full time of a single-brooded 



* On July 6th, 1902, 1 found this species sparingly on the Eastbourne parades 

 in rather worn condition. The season, it will be remembered, was a late one 

 t These larvae produced moths between July 5th and 12th, 1902. 



