Rhynchophorous Coleoptera of Japan. 121 
other by intermediate forms. Other differences, besides 
those of form, are found in the prothorax, which is 
frequently impressed in front, and furnished with a 
structure on its apical margin, varying from a minute 
tubercle, as in X. dryographus ¢, to a spine; in some 
species, as in .Y. coronatus, Hichh., from Venezuela and 
Brazil, and others from Madagascar, this median spine is 
strongly developed and bifid, and there are two lateral 
processes. In the present collection the males of but 
two species are associated with their females, Y. vicarius, 
Hichh., and X. schaufussi, m.; there are, moreover, the 
males of three species which I cannot assign with 
certainty to any female forms, and am compelled to 
describe under separate provisional names. ‘The dates 
and localities of capture have proved of no assistance 
towards identifying them. In one species, Y. cucullatus, 
the anterior margin of the prothorax presents a new 
modification, being produced obliquely forwards and 
downwards into a flat plate, which completely conceals 
the head, in a second, Y. orbatus, there is no process of 
the prothorax, and the general type is that of X. dispar 
¢, while the remaining species, X. galeatus, has a deep 
anterior prothoracic impression with a strong apical 
spinous process which conceals the head, and is of the 
type of Y. eurygraphus g, Ratz. 
Xyleborus cucullatus, sp. n. 
Mas. Breviter oblongus, subnitidus, pilosus, piceo-niger, 
antennis pedibusque ferrugineis, prothorace longitudine et lati- 
tudine subaequali, a basi fere oblique declivi, deplanato, et in 
lobuia transversum marginatum supra caput producto, dense 
punctato, punctis versus apicem exasperatis; elytris lineato- 
punctatis, interstitiis multipunctatis, ad apicem fortiter declivibus, 
subtruncatis, declivitate swbconvexa, immarginata, striata, granu- 
lata. Long. 2—2°6 mm, 
Four examples, Kurigahara, and Konose in Higo. 
Short, oblong, slightly shining, lighter or darker piceous, with 
rather long pubescence. Head completely hidden from above and 
in front, ferruginous, smooth and indistinctly punctured, pube- 
scence almost absent, eyes very small, quite flat with few facets 
antenne ferruginous, of the usual structure, the sensitive surface 
