462 Cu Aquatic Carnivorous Coleoptera or Dytiscide. 
570. Hydroporus ineptus, n. sp.—Ovalis, sat convexus, densius subtiliter pubescens, 
dense subtiliterque punctatus, niger, antennis pedibusque fuscis, illis basi rufo, 
elytris brunneo-obscuris, basi vix dilutiore, plus minusve obsolete fusco-lineatis vel 
signatis, coxis posterioribus crebre subtiliter punctatis ; abdomine segmento ultimo 
sat evidenter punctato. Long. 32, lat. 23 m.m. 
This species is smaller and more finely punctured than Dytiscus planus, (No. 575), 
and has the legs and antenne darker ; it is very similar to the darker varieties ot 
H. lituratus, but has the elytra much more densely and finely punctured. The 
specimens I have seen are all in very bad condition. 
Syria. 380. 
571. Hydroporus errans, n. sp.—QOvalis, sat convexus, sat nitidus, crebrius 
pubescens supra eequaliter subtiliter fere dense punctatus, niger, pedibus antennisque 
obscure rufis, elytris fuscis, humeris indiscrete dilutioribus; coxis posterioribus 
dense fortiter punctatis, abdomine segmento ultimo confuse punctato. Long. 33, 
lat. 2 m.m. 
This species is extremely similar to Hyphydrus pubescens, (No. 568), but is 
rather larger, the basal portion of the third front tarsal joint is less reduced, and 
the punctuation of the apical ventral segment is indistinct ; these characters bring 
it very near to some small varieties of Dytiscus planus, (No. 575), but it does not 
quite attain the size of the smallest individuals of that species, and has the hind 
coxze more coarsely punctured. The much greater development of the punctuation 
and pubescence, as well as the scarcely variegate elytra, readily distinguish it from 
H. lituratus. The few individuals I have examined show no sexual differences. 
Canary Islands. 459. 
572. Hydroporus antidotus, n. sp.—Ovalis, sat convexus, crebre subtiliter 
punctatus, subtiliter pubescens, nitidus, niger, antennis pedibusque rufis, elytris 
rufo-obscuris ; coxis posterioribus sat crebre subtiliter punctatis ; abdomine segmento 
ultimo argute punctato. Long. 33, lat. 2 m.m. 
This species is very similar to Hyphydrus pubescens, (No. 568), but is rather 
larger, and the upper surface is more finely punctured, and the antenne, legs and 
wing-cases are of a reddish colour, and the punctuation of the hind coxe is much 
finer. From H. lituratus it is readily distinguished by the different colour, and 
more finely punctured coxe. 
I have seen only a single individual, but after carefully comparing it with the 
varieties of Hyphydrus pubescens, and Hydroporus lituratus, feel no doubt it 
represents a distinct species; I do not know the sex of this specimen, its front and 
middle tarsi are very slender. 
Syria. (Dr. C. Millingen). 1149. 
