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XVIII. Some Additions to the Coleopterous Fauna of 

 Japan. By D. Sharp. 



[Read 6th July, 1874.] 



Since my former papers on the Water-beetles and Staphy- 

 linida3 of Japan were presented to the Society, I have 

 received some additional specimens from Mr. Lems as 

 well as from other sources, and am enabled to add the 

 following species to the list of Japanese insects: — 



Eunectcs sticticus, Linn, This widely-distributed insect 

 has been found in Japan by Mr. Lewis. 



Di/tiscus marginalis, Linn. I have a single male indi- 

 vidual of this species labelled as coming from Japan ; 

 though it differs in one or two respects very slightly from 

 European specimens, I do not think it can be considered 

 a distinct species. 



Gyrinus curtus. Mots. I have noAv obtained more 

 individuals of the small species of Gyrinus alluded to in 

 my former paper. Motschoulsky's short descrij^tion of 

 G. curtus does not permit me to decide with certainty 

 whether these specimens belong to the sj^ecies he in- 

 tended under that name ; but as it appears to me very 

 probable that they do, I will merely reproduce here his 

 description ; noting that the inflexed margin of the elytra 

 is reddish, and that the width is about 1^ — 1^ lin. in my 

 specimens. 



Gyrinus C7(rtus, Mots. Bull. ]\Iosc. 1866, i. p. 165. 



"Statura G. natatori, sed brevior, ovatus, nitidus, supra 

 plumbeo-niger, sutura fenea, subtus niger, elytrorum mar- 

 gine subtus anoque brunneis, pedibus testaceis;_ elytris 

 ffiqualiter punctato-striatis, interstitiis- planis, apice lato 

 arquatim truncato. Long. '2\ Hn.; lat. U hn." 



Cercyon quisquilius, Linn. A single specimen of this 

 species has been recently received by Mr. Lewis from 

 Kawatchi, Japan. 



TRANS. ENT. SOC. 1874.— PART IV. (dEC.) 



