26 ^h. O. Lewis on 



diaphraoriu (d) in Galeodes from the side, h, heart ; a, alimen- 

 tan' canal ; n, nerve-cords pa&sing through d ; c, .small plates 

 attached by tendons to the endostemite and outer cuticle (cf. 

 text, p. 20). 

 Fiff. 11. Diagram showing the relative positions of the endostemite and 

 diaphragm (d) in Scorpio. Lettering as in fig. 10. The line of 

 section of fijr. 9 is also indicated. 



IIT. — On the Elatericl^ of Japan. By G. Lewis, F.L.S. 



The first object of this paper is to describe as simply as 

 possible the new species of Elateridas brought from Japan by 

 the writer in 1882 ; the second and minor object is to adjust 

 certain synonymy, to revise some previous work on the fauna, 

 and to note and reject species which have been erroneously 

 introduced to the Japanese catalogue. The arrangement of 

 Candcze has been followed as closely as possible, but in two 

 cases I have given full rank to genera merged in others by 

 Candeze. It is also to be noted that some of the species 

 described are very similar to American and European forms, 

 and others again resemble species from the islands and various 

 countries of the Asian continent, yet after a careful exami- 

 nation it appears that only one or two are identical. 



By the kindness of Mr. Godman I have had access to the 

 collection made by the late Mr. E. W. Janson, and this has 

 been of considerable assistance to me ; the collection also in 

 the National Museum has been of material aid, while the 

 specimens returned to me by Dr. Candeze, after writing his 

 paper on the Japanese species in 1873, are of course in my 

 possession and are now amalgamated with the more recently 

 gathered specimens. 



Some species of Elateridre are extremely local, remaining 

 at times as a little colony in or near one tree for many gene- 

 rations, so that there can be hardly any doubt that the number 

 of species yet to be discovered must be very considerable. 

 AOious desertor, Cand., is a case in point ; I found two or 

 three specimens in a glen on ^laiyasan, near Kobc^, in 1871, 

 and on returning there in 1881 I found a few more, and these 

 are, I believe, the only examples known. 



The localities given are selected to furnish some informa- 

 tion regarding the distribution of the species at present 

 known to me ; but no names are given of places which are 

 not registered in my itinerary and do not also ajipear on the 

 map published with it in the Trans. Ent. Soc. Lond. 1883. 

 Authors in describing species would do well to remember 



J 



