the Staphylinidge of Japan. 291 



Myrmedonia similis. 

 Mynnedonia similis, Markel, Germar's Zeitsclir. v. p. 200. 



Kiga and Miyanoshita; four examples. The species is 

 rather rare in Europe, where it inhabits the nests of Formica 

 fuligmosa. The ant to whose nest it is attached in Japan 

 has not been noted. 



Myrmedonia indiscreta, n. sp. 



Fusco-picea, minus nitida, subtiliter punctata ; antennis pedibusquo 

 rufis, abdominis segmentis basalibus piceis ; thorace valde trans- 

 verso, basi et lateribus rotundatis. 



Long. 4 millira. 



Antennae rather short, much thicker externally, fourth to 

 tenth joints transverse, the last twice as broad as long, ter- 

 minal joint moderately acuminate, quite twice as long as the 

 tenth. Head black. Thorax about twice as broad as long, 

 moderately _ closely and finely punctate; hind angles very 

 obtuse and indistinct. Elytra a little longer than the thorax, 

 densely and very finely punctate. Hind body impunctate. 



Seba and Hakodate ; six specimens. 



This is similar to the European i¥. laticollis^ but is much 

 smaller and narrower and differs in numerous minor points. 



Myrmedonia spreta^ n. sp. 



Nigra, elytris brunneis, antennis pedibusque rufis ; antennis brevi- 

 bus, apicem versus latioribus ; pro thorace furtiter transverso, 

 lateribus rotundatis, sat crebre asperato-punctato, basi in medio 

 foveolato. 



Long. 5-6 millim. 



Basal three joints of antenna clear red, the others more 

 obscure, third joint much longer than the second, fifth to 

 tenth each transverse, each narrower at the base; penul- 

 timate joint more than twice as broad as long, terminal quite 

 acuminate. Head broad and very short ; eyes large. Thorax 

 nearly twice as broad as long, sides and base rounded ; hind 

 angles very obtuse, the surface very distinctly, not densely 

 punctate, minutely pubescent. Elytra a little longer than the 

 thorax, closely and finely punctate, of a pale brown colour, 

 darker at the outer apical angle. Hind body shining, im- 

 punctate. 



Sapporo and Hakodate. 



A very distinct species, somewhat similar to M. laticoUis 

 and M. similis, but with peculiar punctuation on the thorax. 



