4G2 til Aquatic Carnivorous Coleoptera or Dytiscidae. 



570. Hydroporus ineptus.n. sp. — Ovalis,sat convexus, densius subtiliter pubescens, 

 dense subtiliterque punctatus, niger, anteunis pedibusque fuscis, illis basi rufo, 

 elytris brunneo-obscuris, basi vix dilutiore, plus rninusve obsolete fusco-lineatis vel 

 signatis, coxis postcrioribus crebre subtiliter puuctatis ; abdomiae segmento ultimo 

 sat evidenter punctate. Long. 3t, lat. 21 m.m. 



This species is smaller and more finely punctured than Dytiscus planus, (No. 575), 

 and has the legs and antennre darker ; it is vei-y similar to the darker varieties of 

 H. lituratus, but has tbe 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. — Ovalis, sat convexus, sat nitidus, crebrius 

 pubescens supra tequaliter subtiliter fere dense punctatus, niger, pedibus antennisque 

 obscure rufis, elytris fusci.s, humeris indiscrete dilutioribus ; coxis posterioribus 

 dense fortiter punctatis, abdomine segmento ultimo confuse punctato. Long. 3t, 

 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 ])lanus, (No. 575), but it does not 

 quite attain the size of the smallest individuals of that species, and has the hind 

 coxte 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 antidotu.s, 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. Dl, lat. 2 m.m. 



This species is very similar to Hyphydrus pubescens, (No. 568), but is rather 

 larger, and the upj)er surface is more finely punctured, and the antennte, legs and 

 wing-cases are of a reddish colour, and the punctuation of the hind coxce is much 

 finer. From H. lituratus it is readily distinguished by the different colour, and 

 more finely punctured coxae. 



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. 



