384 Mr. G. Lewis on 
Rhyssemus asperulus, Waterhouse. 
Rhyssemus asperulus, Waterh. 7. c, p. 94. 
Hab. Nagasaki, Kobé, Yokohama, and Nikko. I found 
this species in garden rubbish commonly as far north as 
Nikko ; at Hakodate I took a broader insect, which may be a 
different species. 
Psammodius ainu, sp. n. 
Oblongus, niger, subnitidus; capite rugoso, obsolete punctato ; 
thorace transversim 5-costato ; elytris 9-carinatis, interstitiis 
seriatim punctatis. 
L. 23 mill. : 
Oblong, black, somewhat shining ; the head very rugose, 
the rugosities obliterating the punctuation, before the neck 
are irregular transverse ridges, varying in distinctness in 
different specimens, clypeus feebly emarginate and reddish on 
the edge; the thorax with five transverse ridges narrowly 
broken in the middle ; the elytra with nine longitudinal carinz 
(inclusive of the sutural and epipleural margins), the inter- 
stices have single rows of shallow punctures. 
Without comparison this species might be mistaken for the 
European P. sulcicollis, Ill. 
Hab. Hakodate. Four examples from the sand-hills. 
Psammodius convexus, Waterhouse. 
Psammodius convexrus, Waterh. 1. ¢. p. 94 (1875). 
Hab. Kobé, Kioto, Niigata, and Sapporo. In sandy 
places. 
Psammodius japonicus, Harold. 
Psammodius japonicus, Har. Deutsche ent. Zeit. xxii. Heft i. p. 69 
(1878). 
‘** Klongato-oblongus, nitidus, piceus, subtus cum pedibus obscure 
rufo-piceus ; capite equaliter granulato; thorace parce punctato, 
ad latera antice transversim impresso; elytris punctato-striatis, 
interstitiis planis levibus.” 
L. 4 mill. 
The thoracic impression is a distinctive character in this 
species. 
Hab. Nagasaki and Enoshima. Hagi (//ler). 
Psammodius comis, sp. n. 
Elongato-oblongus, niger, nitidus; eapite rugoso-granulato, trans- 
