Water Beetles of Japan. 61 
depressus, supra testaceiis, capite prothoraceque crebre 
minus fortiter, elytris crebre subtiliter, punctatis ; subtus 
fuscus, pedibus testaceis, femoribus obscurioribus. Long, 
li-li lin. 
Allied to H. dilutus, Er., but not one quarter its size, 
of a purer yellow colour above. The palpi are entirely 
yellow. The head and thorax are closely and finely punc- 
tured, the latter finely margined at the sides. The elytra 
are very finely punctured, and each has a row of larger 
punctures along the middle. The underside is fuscous, 
the mesosternum obscurely tuberculated. The legs are 
yellow, the femora pubescent except at the extremity, the 
pubescent part darker in colour. 
Nagasaki and Hiogo. 
38. Laccohius minutus, Lin. Nagasaki. The speci- 
mens differ a little from our European ones, but I do not 
perceive any sufficient characters to distinguish them as a 
species. 
39. Berosus japonicus, n. sp. Ovalis, convexus, supra 
sordide testaceus, capite viridi-seneo, prothorace disco 
macula geminata (vel quadrigemina) parva; elytris obscure 
nigro-maculatis, fortiter punctato-striatis, interstitiis parce 
punctatis ; antennis, palpis, pedibusque testaceis. Long. 
2i lin. 
This species is closely allied to B. signaticollis, Charp. ; 
it is rather smaller than that species, and has the elytra 
shorter and rather more deeply striate ; it is readily dis- 
tinguished by the greater extent of the pubescence on the 
under surface of the femora : on the hind femur of B. sig- 
naticollis the pubescence does not extend more than half 
way to the extremity, while in japonicus only the apical 
third is glabrous. The spots on the disc of the thorax are 
small and not united in the middle, and sometimes they 
are separated transversely so as to form four small spots. 
Nagasaki. 
40. Berosus {Enopleurus^ Leivisius, n. sp. Oblongo- 
ovalis, supra pallide testaceus, crebre fortiterque pxmctatus, 
capite vertice, prothoraceque disco utrinque minus evidenter 
fusco-maculatis ; elytris crenato-striatis, interstitiis crebrq 
punctatis, parce brevissime setigeris ; antennis, pedibus 
palpisque testaceis, his apice extremo infuscato. Long. 
21 lin ; lat. 1 lin. 
