(56 NORTHERN ZOOLOGY. 



I have added a query to the synonym of Latreille, because, though his descrip- 

 tion agrees with our insect, his figure does not, for it represents the elytra with 

 eight black spots, which are not to be found in H. impressus. Mr. Stephens, in 

 his description, does not mention that the punctures forming the rows on the 

 elytra are black, which in a describer usually so accurate, renders his synonym 

 somewhat doubtful. 



DESCRIPTION. 



Body reddish-yellow. Head punctured, dusky behind : prothorax yellow, depressed in the mid- 

 dle posteriorly, with a transverse curved series of punctures in the depression ; anteriorjy there are 

 five or six black dots arranged transversely ; at the base, between the central point and the margin 

 on each side, an oblique little furrow but not easily discoverable, is impressed : elytra pale-yellow 

 with a cinereous tint, nine rows of black punctures on each, those near the lateral margin being the 

 faintest; anteriorly, in the interstices of the rows, there are also a few black punctures ; the apex of 

 the elytra is oblique terminating in an acute point : the lamina? that cover the posterior legs are 

 punctured. 



XXXIV. Genus HYDROPORUS. Clair. 



(94) 1. Hydroporus nigro-lineatus. Black-lined Hydroporus. 



Hydroporus nigro-lineatus. Steph. Illustr. Mandib. ii, 52. 6. 



Hyphydrus nigro-lineatus. Schon. Sijn. ii, 33, 16, I. iv, /. 2. Gyll. Ins. Suec. iii, 688, 13, 14. 



A pair taken in Lat. 6*5°. 



Length of the body 2j — 2| lines. 



DESCRIPTION. 



Body lurid-yellow, somewhat glossy, minutely and thickly punctured. Antenna? dusky at the 

 tip : prothorax with a minute black rhomboidal spot in the disk, which is marked with a punctiform 

 impression ; anteriorly it has a transverse series of punctures larger than those of the rest of its 

 surface: elytra most numerously and minutely punctured; the suture, and four longitudinal stripes 

 not reaching the apex, nor the first and third the base, all black ; the fourth or outermost is distant 

 from the margin and interrupted : the alitrunk and abdomen are black. 



In the female, which is less glossy, the external stripe is continuous, and only the second reaches 

 the base; and in the male the prothorax is more conspicuously punctured, and the anterior series of 

 punctures is wanting. 



