5' 



furrowed, bronzed, with the alternate interstices of the discoidal furrows 

 green-bronzed, spotted with little velvetty patches of black hairs. [Be- 

 longs to Cytilus ; not uncommon throughout Canada.] 



[119.J FAMILY HYDROPHILID^. 



169. HvDROBiLs FUSCIPES Liiin. — Length of body 3 lines. A 

 single specimen taken m Lat. 65^ 



Body oblong, convex and rather vaulted; underneath black, very 

 minutely and thickly punctured with a pale short decumbent hair planted 

 in each puncture ; above slightly bronzed, more conspicuously punctured, 

 naked and rather glossy. Head slightly impressed on each side between 

 the eyes ; palpi pale rufous, last joint dusky at the tip : antennae rufous 

 with a black knob : sides of the prothorax with two or three groups of 

 larger punctures : elytra furrowed with thickly punctured furrows, dusky 

 rufous at the sides : legs dark rufous, base of the thighs black. This is 

 smaller than my British specimens, the furrows of the elytra are rather 

 deep, and their sides more conspicuously rufous. [Taken in Canada.] 



[120.] J 70. HvDROBius MARGiNELLus /iz^r. — Length of body I ^'3 

 line. Two specimens taken in Lat. 54". 



Body sub-ellip'-ical, convex, minutely punctured, black ,; above glossy. 

 Palpi and antennae dusky rufous , knob of the latter black : sides of the 

 prothorax, and the anterior margin dusky rufous : elytra with a single 

 furrow adjoining the suture ; sides dusky rufous : tarsi rufous. 



171. HvDROBius MELANOCEFHALUS Oliv. — Length of body 2>4^-2 V^ 

 lines. Two specimens taken in Lat. 54'. 



[i2i,] Body sub-elliptical, minutely punctured; underneath black, 

 somewhat hairy with very short inconspicuous hairs, above lurid or dirty 

 yellow, glossy, more conspicuously punctured. Head black with a qua- 

 drangular yellow spot before each eye ; nose gibbous, separated from the 

 front by a transverse angular line ; palpi and antennse dirty-yellow, the 

 latter with a black knob : prothorax with a dark, discoidal, subquadran- 

 gular spot, which does not reach the anterior margin : shoulders with a 

 dusky line : tibiae and tarsi dusky rufous. 



Var. B. Larger, dusky rufous above, spots before the eyes larger and 

 subtriangular : black spot on the prothorax wider but not so near the 

 anterior margin ; shoulders of the elytra without a dusky line. [This and 

 the preceding are European species ; Kirby's descriptions of them are not 

 sufficiently definite to enable them to be identified with any of the species 

 described by Le Conte in his '* Synopsis of the Hydrophilida of the 

 United Sta^^s." (Pro. Acad. N. S., Philada., June, 1855).] 



