92 
inconspiciiella, I found a dooidod difference in form ; the caBos of incnnspie 
I think invariably three-sided, straight, and grey in colour, while those 1 1 
round, slightly curved, and generally green. 
When I first discovered them, I forwarded a supply to Mr. Staintoi^l 
however, thought thoy would provo Dipterous, and informed me that he* 
once found a case of apparently the same species on a plum tree. 
Towards the end of June, however, moths began to appear (all apterous fenuflefl 
something like, but easily separable from, females of inconspicuella, being 
yellower in colour, and with the ovipositor very much longer. 
I continued every season to breed the insect in largo numbers with the ho 
of discovering the male, but nothing appeared but females ; these would layj 
in great abundance, and the glass cylinders in which I kept them would 
swarming with the young larvaa. 
I sent hberal supplies of cases to Mr. Doubleday, Mr. Stainton, Mr. 
and other of our leading entomologists, with tho samo result I believe in I 
case, viz., nothing but females appearing. 
The late Mr. Weaver appears to have met with this or a similar spec 
North Wales, as he says in a communication to tho Zoologist of 1856, "Ls 
summer, when collecting in North Wales, I found several small cases on the roc 
at Conway that were entirely new to mo; they were covered with tho lichen up' 
which tho larva) wero feeding, the cases were round, and a little curved. Thei' 
when bred, produced all females, bearing a very close resemblance to inconsi?icuelk, 
It is, I believe, now generally understood among entomologists that there 
no doubt that the economy of the genus Solcnohia and others resembles in sod 
measure that of Aphis, viz., a series of generations without sexual intorconrse, i 
great point of difference being that the Aphides, being viviparous, produce tki 
young at once ; while with the Solenolia, eggs are laid, and the usual com-se of Ian 
pupa, and imago appears. 
It has often puzzled mo as to how tho different species of Solenohia becor 
distributed ; only this day I discovered a case on a small tree not thicker tb 
my wrist, and I know of several young trees growing quite detached from othc 
upon which tho cases abound. 
I do not believe that the larva over travels many inches from the spot npi 
which the eggs are laid, and the females appear quite incapable of locomotion. 
Altogether tho species has been a problem to mo ever since I began to ta 
some interest in it, but I am glad to say I have at last in some measure bci 
enabled to understand a littlo more of its habits and economy than I used to do. 
On some pear trees hero I have always been able to get a supply of cas 
when wanted j and, upon an examination of these trees the other day by myself ai 
my friend Mr. A. E. Hudd, we discovered that a largo number of the cases we 
empty, the moths having emerged. A search for the imago was rewarded by tl 
discovery of a couple of Little moths we did not recognise, and therefore hopi 
would prove male Solenohia pomonce ; we, however, much to our chagrin, failed 
capture either. 
Next morning I renewed the search, and captured six fine specimens. I th( 
collected a lot of tho cases in o glass, and soon had the satisfaction of seeing a moi 
emerge. Altogether, I have bred about two dozen specimens, eight of which a 
apterous females, but the rest all winged ; but judge of my utter astor/shmcnt who 
