Water Beetles of Japan. 59 
32. Hydrocharesjlavipes, Stev. var. A single specimen 
found at Nagasaki is so close to our European H.Jlavipes, 
that I think it may perhaps prove a mere variety thereof. 
33. Steniolophus fulvipes, Mots.?* A species of Ster- 
nolophus is common in Nipon and Kushiu ; though I 
have not been able to see Motschoulsky's description of 
S.fulvipes, I think it so likely that this insect is what he 
intended thereby that I do not describe it as new. 
34. Philhydrus japonicus. OvaHs, convexus, nitidus, 
niger, palpis, antennis basi, clypeo macula utrinque, et 
prothoracis elytrorumque lateribus testaceis, pedibus piceis, 
tarsis dilutioribus ; crebre sat fortiter punctatus, elytris 
obsoletissime striatis, seriebus tribus punctorum majoirum. 
Long. 3 Hn. ; lat. If— If. 
Kather larger and notably broader than P. testaceus. 
Palpi yellow. Head black, with a narrow, but distinct, 
yellow spot on each side in front of the eye ; closely and 
rather strongly punctured. Thorax black, wdtli the sides 
very distinctly yellowish, the yellow colour also extending 
along the front margin, so that the extreme front margin 
is pale ; the pale colour also extends inwards along the 
hind margin, but more indistinctly; closely and distinctly 
punctured, on each side with some larger punctures form- 
ing a not very distinct horse-shoe curve. Elytra black, 
distinctly margined with yellow, rather strongly and 
closely punctured, the punctures not quite so numerous at 
the extremity as at the base ; they have a sutural stria 
abbreviated at the base ; they also jjresent indistinct traces 
of being striate-punctate, and moreover have three series 
of larger punctures, of which the outer is not so well de- 
fined as the other tAvo. Beneath the femora are black and 
pubescent, except the extremity, which is reddish and im- 
punctate. The tibiae are pitchy ; the tarsi yellowish. The 
mesosternal carina strongly elevated, acuminate below. 
Nagasaki. 
35. Philhydrus simulans, n. sp. Ovalis, sat convexus, 
supra testaceus, capite postice nigro ; sat crebre fortiter 
punctatus, elytris fortiter striatis, striis internis basi obso- 
letis, interstitiis 3, 5, 7, 9, serie punctorum majorum : 
* I find this species cannot be reconciled with Motschoulsky's descrip- 
tion of S. fulvipes here alluded to. I am sorry to say, however, that I 
cannot decide whether the Japanese insect be the same as the Indian 
S. rvjijyes, Fab., or not. D. S. 
