Rhynchophorous Coleoptera of Japan. 57 
Hylastes plumbeus, n. n. 
H. obscurus, Chap., Scol. Jap., p. 197. 
Common; taken with H. parallelus, also at Nikko, 
Kobe, &e. 
Somewhat variable, in colour from black to obscure 
brown, in the width of the rostrum and prothorax, and 
in the depth of the elytral striz. I have changed the 
name, owing to the priority of Hylastes (Hylastinus) 
obscurus, Marsh, (trifolii, Mil.) 
Hylasies ambiguus, sp. 0. 
Oblongus, subnitidus, piceo-brunneus, capite granulato, fronte 
haud carinata, punctata ; prothorace transverso, antice constricto, 
fortiter punctato, linea media elevata levi; elytris basi singulis 
subtiliter rotundatis, prothorace latioribus et duplo longioribus, 
striato-punctatis, striis aequaliter impressis, interstitiis rugosis 
versus apicem tuberculatis, squamulis brevibus vestitis et uniseriatim 
setosis ; tarsorum articulo 30 antecedentibus haud latiore. Long. 
2°7 mm. 
Fujisan, one specimen, in bad condition, apparently 
dead when taken. 
Suggesting in appearance the species of the sub-genus 
Hylurgops, Lec., but without the prominent mesosternum and 
evidently bilobed 3rd tarsal joint. Reddish-brown, somewhat shin- 
ing. Head black, finely granulate on vertex with a shining central 
line, rostrum wide, not carinate, front strongly punctured ; 
antennal club with first joint large, equal to the two succeeding 
joints. Prothorax transverse, constricted towards apex above and 
at sides, strongly and closely punctured, inconspicuously pubescent, 
with a fine central raised line from base to anterior constriction. 
Elytra wider than prothorax at base, and exactly twice as long, 
basal angles prominent rounded, sides slightly rounded to near 
apex, thence somewhat oblique and feebly sinuate, apex rather 
obtuse in middle ; above brown, lighter behind, striato-punctate, 
striae not deep, their punctures strong, interstices rugose at base, 
with a single row of fine tubercles from middle to apex, covered 
with short scale-like hairs and a single series of scattered sete. 
Underside brown, punctured ; middle coxw rather widely separated. 
Very like H. opacus, Er., but quite distinct in the 
shape of the thorax. 
