192 THE ENTOMOLOGIST, 



a Supplement (dealing with the limitation of the geneva) to 

 his "Monograph on the Ephemeridae" (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 Albavda, of Leeuwavden, com- 

 prising specimens from almost all parts of the world. 

 Amongst the most interesting were some specimens in fluid 

 from South America, and a collection from Sumatra. From 

 the Amazonian collection in spirits, it would appear that the 

 deficiency in legs in Campsuvus 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 Eulhyplocia 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 ibssil 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 setae 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 setae 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 BuUerJlies. — The Rev. R. P. Murray stated that 

 he was preparing a resume 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. 



