Geodephagous Coleoptera of Japan. 253 



Agrees with Stomis pumicatus in all essential points of 

 structure, but very much larger and of different facies, 

 owing to its more ovate form, and especially to its thorax 

 being dilated and rounded more in front, and strongly 

 sinuated and narrowed behind. The mandibles are 

 greatly elongated in both sexes, the palpi long and 

 linear, and the antennae relatively much longer than in 

 S. pumicatus. 



EUCALATHUS, n. g. 



Gen. Calatho affinis ; corpus elongatum, gracile, tho- 

 race elytris multo angustiori, elongato-quadrato. Mentum 

 dente acute bifido. Palpi graciles, articulis terminalibus 

 apice attenuatis. Antennae elongatae gracillimse, articulo 

 tertio quarto vix longiori. Prosternum apice haud mar- 

 ginatum, apice verticaliter acute carinato. Metasterni 

 episterna brevia. Elytra apice haud perspicue sinuata, 

 sat profunde striata, interstitio tertio bipunctato. Tarsi 

 4 posteriores subtus longe et dense pilosi, supra glabri, 

 articulis 1 et 2 utrinque unisulcatis ; ungues (prope 

 apicem excepto) acute denticulatae ; mas articulis 1 — 3 

 elongato-triangularibus. 



The facies of the two species known of this genus are 

 quite different from the Calathi, even from such aberrant 

 forms as C. Solieri and C. Deyrollei. From the true 

 Calathi they also differ in the densely hairy soles of the 

 four hind tarsi and the unmargined apex of the pro- 

 sternum, characters which are presented by Pristosia 

 picea, but associated with features foreign to Eucalathus, 

 such as the short triangular form of the dilated tarsi, the 

 obsolete tarsal grooves and the impunctate 3rd elytral 

 interstice. I think it likely that the East Siberian 

 Calathus nitidulus (Mor.) belongs to Eucalathus. 



Eucalathus ceneolus. 



Pristonychus ceneolus, Bates, Trans. Ent. Soc. Lond., 

 1873, p. 272. 



Hiogo; Nikko, Miyanoshita; Fukushima; Wada toge. 



A handsome species, resembling in form the slenderer 

 species of Pristonychus, but of olive-green colour, some- 

 times rich golden olive, and highly polished. It varies 

 in size from 12 to 16 mm. A specimen from Nikko has 

 the thorax much narrowed and sinuated near the base. 



TRANS. ENT. SOC. 1883. PART III. (AUG.) U 



