192 THE ENTOMOLOGIST. 
a Supplement (dealing with the limitation of the genera) to 
his “Monograph on the Ephemeride” (Trans. Ent. Soc., 
1871). A considerable amount of new material had been 
most kindly submitted to him by Mr. Robert M‘Lachlan, of 
Lewisham, and M. Herman Albarda, of Leeuwarden, com- 
prising specimens from almost all parts of the world. 
Amongst the most interesting were some specimens in fuid 
from South America, and a collection from Sumatra. From 
the Amazonian collection in spirits, it would appear that the 
deficiency in legs in Campsurus and some of its allies was 
due to their being shed with the pupa-skin when the insect 
obtained well-developed wings. In some forms all the legs 
were then cast off by the female (this was apparently the case 
with Euthyplocia also); in others the anterior pair of legs 
was retained by the female, as it was seemingly by all males. 
The separation of the legs cast off takes place between the 
femur and the trochanter. The posterior legs would be 
useless to them, as on attaining the complete winged stage of 
development they retain the submarginal pellicle, and live 
but a few hours in the air. From Lahat there were sub- 
imagines of a Cronicus, a genus known previously only from 
a fossil in amber from Prussia. Several new forms, whose 
existence was expected from analogy, were in these col- 
lections. The whole family seems to consist of associated 
series of genera. In every series the forms differ from one 
another in the number of setz or wings; while in tarsi and 
neuration and eyes they are very much alike. Such are a 
form distinguishable from Lachlania by the female possessing 
three long sete instead of two only; another differing from 
Potamanthus (restricted) in the middle seta being extremely 
_ short and minute; and another which resembled Siphlurus, 
excepting in the possession of a long intermediate seta 
instead of a minute rudiment of one. There were many new 
genera allied to the typical Leptophlebia, in addition to the 
series of species associated with it in the Monograph as 
sections, which will now be separated as genera from it. 
Japanese Bullerflies—The Rev. R. P. Murray stated that 
he was preparing a resumé of all the species of Japanese 
butterflies hitherto noticed, and that he would be grateful to 
any entomologist who could assist him with the loan of 
specimens, 
ee 
we 
