414 Mr. W. L. Distant' s first report on the 



Eurygaster maums. Tropicoris rufipes. 



Zicrona ccerulea. Corizxis maculatus. 

 Carpocoris nigricornis. ,, crassicornis. 



Dolycoris verbasci. Lygcsus equestris. 

 Rubiconia intermedia. 



These are all familiar names of abundant species, and 

 the inference which I thereby assume is, that when 

 European species are found in Japan they are those 

 which are widely distributed throughout the Palsearctic 

 region. Another very noticeable and peculiar character 

 in such species — and one that has been already pointed 

 out bj the specialists in other orders — is in the large 

 size they attain in Japan, Carpocoris nigricornis and 

 Tropicoris rufipes being particularly developed in that 

 respect, and the same statural increase is also evident 

 in widely distributed species of the Oriental region when 

 found in Japan, as is strikingly shown by Plautia 

 fimbriata. 



As regards the Oriental affinities of the Japanese 

 Ehynchotal fauna much greater difficulty exists in form- 

 ing an opinion, owing to the imperfection of the little- 

 worked Oriental specific record. "When the species of 

 that region are even approximately enumerated, some of 

 these now first described from Japan will doubtless be 

 found to have a far wider range of habitat, and there- 

 fore it would be unscientific and misleading to speak of 

 any of the species here described as endemic till we 

 know more of the surrounding Ehynchotal faunas. 



It is clear, however, that the Oriental species found in 

 Japan are very considerable, and the conclusion derived 

 from these imperfect data is that, as might reasonably 

 have been predicted, the Ehynchotal fauna of Japan has 

 been largely derived from Palsearctic elements derived 

 from and by the north, and from Oriental species which 

 have evidently and necessarily entered by the south. 



The following is an enumeration of the species be- 

 longing to the families to which this paper principally 

 refers : — 



PENTATOMHXSi. 



PLATASPIN^. 



Goptosoma cribraria, Fabr., var. . . Yokohama, Nagasaki. 

 „ biguttula, Motsch. . . Nagasaki. 



CYDNIN^. 



Cydnvs nigritus, Fabr. . . . . Yokohama, Sendai. 



Geotomus punctulatus, Costa, var. .. Yokohama, Nagasaki, Hitoyoshi. 



