Geodcplioxjous Coleoptera of Japan. 289 
very similar to that of Pt. madidus ; the palpi are rather 
more slender, but are sharply truncated ; pal]ii, apical part 
of the antennfe and tarsi are rufescent. The thorax is 
much narroAved towards the base, and at the hind angles 
shows a distinct oblique truncature ; the basal fovea) are 
wide and shalloAv, and closely rugose-punctate, the lateral 
fold is entirely wanting. 
Pt. Thunhergi,MoY[m\iz, Bull. Ac. St. Pctersb. v. 18C3, 
p. 325 ; id. Beitr. p. 57. 
Hakodadi. Not met Avith by Mr. LcAvis. 
If I ha\'e rightly determined this species from specimens 
taken by Mr. A. Adams in Yesso, it seems to me to belong 
rather to Sterojnis than to Ptcrosticltus. In general form 
it approaches Pt. {Steropus) tropiduj-tts, but is distin- 
guished at once by its impunctate base of thorax and the 
long simple basal ioYex. 
Pt. spliodriformis, n. sp. 
Elongatus, gracilis, piceus nitidus, pedibus ferrugineis ; 
capite pone oculos incrassato, deinde angustato ; thorace 
clongato, cordate, angulis posticis rectis, basi utrinque uni- 
foA'eato, punctato ; elytris elongato-oblongo-owatis, parum 
couA'cxis, thorace antico vix latioribus, apice sinuatis, for- 
titer striatis, interstitio 3'° tripunctato ; striola scutcllari 
brcvissima obliqua; tibiis anticis, apice excepto, hand 
spinulosis. 
S Segmento ultimo ventrali apice fovea magna profunda 
cxcavatii, margine apicali fortiter sinuate. 
Long. S^lin. $ $. 
Hiogo ; four examples. 
A fine, elegantly-shaped species, reminding one of the 
Sphodri ; also closely resembling Pt. rvjipes, but much 
larger. The general colour is pitchy-black or brown, 
highly polished; the abdomen and palpi rather lighter, 
and the legs brighter ferruginous. The head is similar in 
form to Pt. fasciato-jninctatus and others, but the man- 
dibles are longer and straighter. The thorax has not very 
prominent anterior angles; it is then rotundate- dilated, 
and before the middle begins gradually to narroAv in an 
incurved line to the basal angles, Avhich are rectangular ; 
the disk is very smooth ; the basal foveas form long stria?, 
and their vicinity near the base is faintly punctured. The 
