68 NORTHERN ZOOLOGY. 



(97) 4. * Hydroporus picatus. Pitch-coloured Hydroporus: 



H. [picatus J obscurus, punctatissimus, supra piccus; capita, antennis, pedibus, prothoraceque antice, ferrugiueis , ehjtris obsolete 

 quadristriatis : striis postice abbreviatis. 



Pitch-coloured Hydroporus, not glossed, very thickly punctured, above piceous ; head, antennae, legs, and prothorax ante- 

 riorly, ferruginous : elytra with four obsolete posteriorly abbreviated furrows. 



Length of the body 2i lines. 



A single specimen taken in Lat. 54°. 



DESCRIPTION. 



Body dark piceous, without gloss ; covered, especially above, with an infinity of punctures. 

 Head obscurely ferruginous, dusky behind, with a paler quadrangular spot extending to the mouth 

 between the eyes ; antennae ferruginous : prothorax with its anterior half dark ferruginous, marked 

 with a discoidal punctiform impression or little furrow : elytra with four posteriorly abbreviated punc- 

 tured furrows, very difficult to be discerned, and only by looking on one side from behind : forebreast 

 and legs ferruginous; alitrunk and abdomen black. 



(98) 5. * Hydroporus similis. Similar Hydroporus. 



H. ( similis J subnitidus, punctatus, supra dilute piceus ; capite prothoraceque, antice, pedibus antepcctoreque, testaceis; ehjtris, 



dimidio ba&ilari grosse punctato et distinctc quadristriato. 

 Similar Hydroporus, rather glossy, punctured ; above piceous with a paler lint ; head and prothorax anteriorly, legs and 



fore-breast, testaceous : basilar half of the elytra coarsely punctured, and with four distinct furrows. 



Length of the body 2g lines. 



Taken with the preceding species ? 



DESCRIPTION. 



I at first regarded this as the other sex of H. picatus, but upon inspecting their tarsi I found 

 they were both males. This species is smaller, more glossy, the parts that in that are dark ferru- 

 ginous, in this are much paler ; the punctures on the upper surface are less numerous and larger, 

 especially those of the basilar half of the elytra, and the four furrows, particularly the three dorsal 

 ones, are deeper and more distinct ; the disk of the prothorax also is transversely levigated and 

 impunctured. 



Both these insects come very near to H. picipes, but that species has not the discoidal impression 

 in the prothorax ; and its elytra are dark testaceous, striped with black. 



N. B. All the above species belong to Mr. Stephen's second division of the family with the 

 sides of the prothorax rounded. 



