On Aquatic Carnivorous Coleoptcra or DytiscidcB. 353 



antennis basi testaceo apice fusco, pedibus testaceis, tibiis posterioribus apice 

 fusois ; coxis posterioribas sparsim obsolete punctatis. Long. 2h, lat. li. m.m. 



The sexes differ very little externally, in the male, however, the front and middle 

 tarsi are slightly broader than in the female. 



The specimens found in Algeria are rather smaller and broader, and have the 

 mark on the elytra rather less in extent, and the punctuation of the elytra more 

 sparing ; but they cannot be considered a distinct species, as intermediate forms 

 occur in Spain. 



Europe : apparently rare iii Northern Europe, but recorded from Gl" in Finland by Sahlberg. Algeria, 

 Syria. 64. 



270. Hydroporus confusus, Klug, Symb.. Phys. IV, t. 34, f 4. — Oblongo-ovalis, 

 subparallelus, testaceus, vertice, prothoracis basi medio, pectoreque infuscatis, 

 abdomine nigricante ; elytris fusco-signatis, signaturis anterius divisis et pro- 

 longatis, sparsim obsolete punctatis ; coxis posterioribus obsolete punctatis. Long. 

 2, lat. 1 m.m. 



This species is very closely allied to Dytiscus geminus, (No. 269), but is smaller, 

 narrower, and more parallel, and is more brightly coloured. 



Though the Hydroporus confusus Klug, was considered by Schaum as not suffi- 

 ciently different from Dytiscus geminus, it appears to me probable that it is really 

 a distinct specie?. 



Egypt, (Cairo). GG. 



271. Hydroporus pentagrammus, Schaum, M.C. — Oblongo-ovalis, testaceus, pro- 

 thorace basi medio, abdominis pectorisque lateribus plus minusve infuscatis ; elytris 

 sutura lineisque duabus posterius conjunctis fuscis, crebre obsoletissime punctulatis, 

 subopacis : coxis fere impunctatis. Long. 2, lat. 1 m.m. 



Closely allied to Hydroporus confusus, but yet narrower, and more brightly 

 coloured, the elytral markings consist of two dark lines, which are joined together 

 behind, but are throughout quite distinct from the sutural mark. 



Egypt. 66. 



272. Hydroporus thermalis, Germ., M.C. — Oblongo-ovalis, testaceus, pectore 

 abdomineque infuscatis ; elytris sutura lineisque duabus fuscis, interna apice hamata, 

 externa valde abbreviata, sparsim obsolete punctatis ; coxis posterioribus parce 

 obsolete punctatis. Long. 2, lat. 1 m.m. 



Li this species the thoracic line can scarcely be said to be continued on to the 

 elytra; the continuation is, however, represented by a small fovea or elongate 



