On Aquatic Carnivorous Coleoptera or Dytiscide. 799 
elytris sat crebre, mediocriter punctatis, basi, sutura lineisque quatuor, 1 et 3 antice posticeque paullo, 2 
antice valde, 4 brevi utrinque magis abbreviatis, lineolaque postica laterali, subobliqua, nigris. Long. 
5, lat. 3 m.m.” 
[This diagnosis is followed, l.c., by a long description] 
I can form no clear opinion as to the species, it may possibly be a Herophydrus or Coelambus,— 
D. 8. 
1387. Hydroporus interpulsus, Walk., Ann. Nat. Hist., 3rd ser., II, 1858, p. 304. Ceylon. 
“Niger, crassus, capite, thoracis fascia latissima et elytrorum margine tenui luteo-ferrugineis. Long. 
12 lin.” 
According to the type in the British Museum this is allied to No. 370, Hyphoporus aper.—D. 8. 
1388. Hydroporus kingii, Clk., Ann. Nat. Hist., 1862, p. 178. Mexico. 
“‘Ovatus, subdepressus, punctulatus; thorace nigro, marginibus flavis ; elytris rufo-fuscis ; pedibas 
antennisque rufo-testaceis. Long. corp. 14 lin., lat. ? lin.” 
““Ovate, broad, subdepressed; when seen under a high power, finely and sparingly punctate; glabrous, 
darkly castaneous: head broadly transverse, impunctate, black: thorax broadly transverse, the sides 
rounded in form, the marginal line being continuous with that of the sides of the elytra and also of the 
head ; the anterior margin is straight, the anterior angles being subprominent ; parallel to the anterior 
margin is a row of minute punctures; the surface generally is impunctate and glabrous, with faint 
traces near the base of obsolete punctures ; in colour black, the sides being suffused more or less broadly 
with flavous ; elytra sufficiently robust, towards the apex subacuminated (but not so distinctly as in 
H. wardii); the surface is finely and somewhat sparingly punctate throughout, with a single medial 
stria of closely arranged minute punctures on each elytron: abdomen and underside black ; legs and 
antenne rufo-testaceous.” 
This is allied to Hydroporus vilis, Lec. (No. 641).—D. 8. 
1389. Hydroporus laccophilinus, Lec., Proc. Am. Phil. Soc. 1878, p. 595. North America. 
“‘Ovate, depressed, pointed behind, brown, paler in front, darker behind; epistoma not margined, 
head finely punctulate ; prothorax (J/as) rugose and finely punctured, narrower in front, sides oblique, 
finely margined. Elytra (J/as) strongly punctured, shining (Yem.) opaque, finely sparsely punctulate. 
metasternum channeled for the posterior half of its length; sparsely punctured in front ; abdomen 
coarsely punctured in both sexes. Length 2:6 m. m. ; -10 inch. 
“ Detroit; rare. The form is exactly that of a Laccophilus in miniature. The head and prothorax 
of the fem. are opaque and very finely and sparsely punctulate.” 
1390. Hydroporus lanceolatus, Walk., List. Col. Lord. p. 10. Wady Ferran. 
“‘ Black, elongate, elliptical, slightly shining. Head, palpi, antennze and legs tawny. Prothorax. in 
front with a broad tawny band, which is much excavated on each side of its hind border. Pectus with 
a tawny spot on each side. Elytra smooth, each with a large testaceous basal patch which emits two 
lanceolate streaks, with two testaceous dots near the suture, and with a large posterior elongated 
testaceous patch which extends to the tip and includes a black dot. Length of the body 2} lines.” 
This is probably to be assigned to Deronectes.—D. S. 
1391. Hydroporus latebrosus, Lec., Ann. Lye. V. p. 208. California. 
“ Ovalis, convexiusculus, postice magis attenuatus, minus dense punctatus, piceus nitidus, thorace 
