LIFE-HISTOEIES. 



248 



colours with which some parts of various Acridiidae are bedecked 

 mean much to them, and that, therefore, wherever these colours could 

 have betrayed the presence of the insect bearing them, changes in 

 structure are noticeable, i.e., the narrowing of the hind femora and 

 the deepening of the groove on their inner side. 



{To he concluded.) 



<g)RTHOPTERA. 



Panchlora viridis in England. — On May 3rd, 1901, whilst 

 purchasing fruit at a shop in this town, the fruiterer's son handed to 

 me, for identification, an Orthopteron found by him when unpacking 

 a bunch of bananas shipped from Costa Rica. The specimen (then 

 very active), being unknown to me, w^as sketched in water colours and 

 submitted ultimately to Mr. Burr, who writes me thus: — "It is almost 

 certainly Pancldoia riridis which is about the commonest species of 

 the somewhat large genus .... all natives of the tropical 

 parts of America .... I have not heard of Panchlora 

 {s,-iisii stn'rfo) being noted before with us." The fact of its occurrence 

 in England appears to be certainly worthy of record, although explained 

 by the above quoted authority who further says : — " A large number 

 of exotic cockroaches have become cosmopolitan with the expan- 

 sion of modern shipping, &c." — Arthur J. Jenvey, The Abbey, 

 Romsev. Ma>^ 15th, 1901. 



XaOTES ON LIFE-HISTORIES, LARY^, &c. 



The development of the Imago in the Pupa of Lachneis lanestris. 

 — At some date last year I met with the statement that the imago 

 of LacJnu'iti laiu'stris develops within the pupa some time during its 

 first year of existence, and so remains as an imago ready to emerge 

 even in the case of those pupae that fail to produce imagines until 

 the second, third, or even sixth or seventh years, I do not 

 now remember where I saw this opinion stated, or whether I 

 merely heard it expressed verbally at some meeting of an Enio- 

 niological Society ; but I found on consulting various friends of 

 much experience in rearing lepidoptera that several entertained this 

 view, whilst no one either contradicted it or seemed to see anything 

 doubtful about it. In Barrett's Lfjtiduptera, vol, iii,, p, 11, it is stated 

 to ])e the case that the imago remains fully matured and ready to 

 emerge over several years, any doubt as to the definiteness of the 

 language employed being removed by Mr. Barrett's assurance that that 

 was his meaning. I felt as positive that this view was erroneous as 

 one can be without absolute available proof. In the first place, I knew 

 positively that, in such cases as the Acronyctids, Acronicta leporina, and 

 ( 'iisjiidia iiirijaccidiald especially, I'etasia niibeculosa, and others, no 

 development took place till the year of emergence, and in the second I 

 felt tolerably sure that I had made the same observation on Lachneis 

 lanestri.s itself, but was naturally doubtful about this in the absence of 

 any written note and the consensus of opinion against me. To 

 determine the point I got a number of cocoons of L. lanestris last 

 autunni. This spring these divided themselves into three sets : (1) 

 Those that emerged (some thirty odd) ; (2) those that are dead (a dozen 



