Rhynchophorous Coleoptera of Japan. 75 
between these species it is because they are not dis- 
tinguished by any prominent or definite characters ; and 
the student, who may have difficulty in identifying the 
species as here defined, would have almost equal difficulty 
if the specimens in my collection were before him.” 
Polygraphus oblongus, sp. 0. 
Oblongus, subnitidus, niger, elytris apice rufescentibus, squamis 
flavo-cinereis vestitus ; clypeo emarginato, oculis subconvexis, 
antennarum clava oblonga infuscata acuminata ; prothorace antice 
fortiter constricto, linea media subelevata, punctis subaciculatis 
sat densis notato; elytris versus apicem subdilatatis, tenuissime 
striatis, ad basim granulatis. Long. 3°2 mm. 
Mas. Fronte subconvexa, breviter pilosa. 
Fem. Fronte convexa, bituberculata, brevissime pubescente. 
Four examples, Chiuzenji and Subashiri. 
Oblong, black, with elytra becoming gradually reddish towards 
apex. Head with front slightly convex in male, rugosely punctured 
and rather dull, pubescence short, in female convex, shining, very 
shortly pubescent, with two distinct tubercles in middle, below 
them with slight impression, clypeus emarginate in middle, eyes 
feebly convex, more distinctly in female, antennal club rather large, 
infuscate and evidently acuminate at inner side of apex, more 
strongly in male than in female. Prothorax nearly half as: broad 
again as long, strongly constricted towards apex with sides more 
convex behind constriction than at base; surface rather shining, 
with close subaciculate punctuation and thin squamous covering ; 
median line slightly elevated, variable in length and distinctness. 
Elytra more than half as long again as prothorax, one-third longer 
than wide, slightly but discernibly dilated towards apex, dull, 
scales close, cinereous with a yellow tinge, striz faint but dis- 
tinguishable throughout, weaker at apex in female than in male. 
Legs dark, ferruginous, with tarsi lighter ; all tibize spined at apex. 
When compared with LP. poligraphus, this species 
differs in its larger size, infuscate elytral club, thinner 
frontal pubescence, shorter and more constricted pro- 
thorax. The elytral apex is lighter in colour, and this 
does not appear to be due to immaturity. The punc- 
tuation of the head in the female is more distinct. 
Polygraphus proximus, sp. n. 
Antecedenti omnibus simillimus, sed brevior, elytris ad apicem 
