94 HYDROPHILIDA. 
upper surface is also paler, the prothorax being testaceous, with a fuscous mark on 
the middle. 
Mr. Champion has sent only two individuals. 
3. Hydreena sordida. 
Nigra, supra fuscula, capite nigro ; prothoracis elytrorumque lateribus parum argute testaceis ; antennis, palpis 
pedibusque testaceis ; prothorace transversim subquadrato, lateribus in medio leviter ampliatis, expla- 
natis, dense fortiterque punctato, leviter inequali; elytris fortiter seriatim punctatis. 
Long. 2, lat. 3 lin. 
Hab. Guaremaa, San Joaquin in Vera Paz and San Gerénimo (Champion). 
Head very coarsely punctate; thorax also coarsely and closely punctate, with the 
surface rather uneven from some indistinct impressions, and the sides distinctly ex- 
planate ; the width isa good deal greater than the length, the sides are finely and densely 
crenate, and slightly but distinctly narrowed both in front and behind. The elytra 
have the sides distinctly a little explanate, and bear numerous regular series of coarse 
punctures, which are less distinct at the apex than at the base. 
This species is closely allied to H. longicollis and to H. puncticollis, but is of broader 
form, and the surface is more coarsely punctate, and the sides of the thorax are distinctly 
a little flattened out or explanate. 
4, Hydrena brevis. (Tab. III. fig. 6.) 
Brevis, latiuscula, testacea, opacula, vertice fusco ; elytris sordidis lateribus testaceis ; prothorace transverso, 
lateribus in medio angulatis, dorso ineequali dense rugoso ; elytris omnium densissime fortiter sculpturatis. 
Long. #, lat. 2 lin. 
Hab. Guatemata, San Joaquin in Vera Paz and San Geronimo (Champion). 
Of unusually short and broad form. Head broad, opaque, vertex more obscure in 
colour than the front, coarsely but obsoletely punctate. ‘Thorax a good deal narrower 
than the elytra, strongly transverse, the sides distinctly crenate, much narrowed in front 
and behind, so as to be angulate in the middle; the surface coarsely sculptured, opaque, 
and uneven. Elytra closely covered with series of extremely dense coarse punctures, 
so that the interstices are reduced to narrow lines; the surface is quite dull, and the 
sides are rather broadly explanate. The under surface is rufescent. The prosternum 
only very indistinctly carinate; the middle of the metasternum with a fine raised longi- 
tudinal line on each side near the extremity, and outside of this with an indistinct 
groove. 
CYCLONOTUM. 
Cyclonotum, Erichson, Kaf. Mark. i. p. 212; Muls. Ann. Soc. Agr. Lyons, 1844, p. 167. 
Celostoma, Brullé, Hist. Nat. v. p. 293. 
Dactylosternum, Woll. Ins. Mad. p. 99 (subgen.). 
This genus, including in it Dactylosternum, consists of thirty or forty species, and 
