THE CANADIAN ENTOMOLOGIST. 29 



Very like the preceding species, but smaller : it differs principally in 

 being perfectly smooth and without punctures, even when examined under 

 a powerful magnifier. The head has two larger vertical lurid-yellow spots, 

 and there is a triangle of the same colour between the eyes, which at its 

 base is dilated, and occupies the nose and mouth : the prothorax is lurid- 

 yellow with two oblong oblique dusky spots beyond the middle ; towards 

 the base is an obtus-angular transverse impression, and on each side, at a 

 little distance from the margin, is an oblong punctiform impression : in the 

 elytra are six distinct narrow black stripes, none of which are confluent 

 except at the apex ; at the side, but at some distance from the lateral margin, 

 are three black spots placed in a line, or a stripe wider than the others 

 twice interrupted : the legs are testaceous with the posterior tibiae black 

 at the tip. [Placed, with a mark of interrogation, as a synonym of IT. 

 Diiodecimllneatus, Lee, in Le Conte's list, p. 16.] 



[68.] 97. Hydroporus Picatus, Kirby. — Length of body 2 y> lines. 

 A single specimen taken in Lat. 54 . 



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 : antenna; 

 ferruginous : prothorax, with its anterior half, ferruginous, marked with a 

 discoidal punctiform impression or little furrow : elytra, with four posteriorly 

 abbreviated punctured furrows, very difficult to be discerned, and only by 

 looking on one side from behind : forebreast and legs ferruginous : alitrunk 

 and abdomen black. 



98. Hydroporus Similis, Kirby. — Length of body 2 * 3 lines. Taken 

 with the preceding species? 



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 ferruginous, 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 //. Piripcs, 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 divisions belong to Mr. Stephen's second division 

 of the family with the sides of the prothorax rounded. [/7. Similis has 

 been taken in Canada.] 



