212 THE CANADIAN ENTOMOLOGIST. 



cal, incrassated ; pedicel subspherical ; third and fourth joints subfiliform ; 

 fifth obconical ; sixth subturbinate ; the three last forming a short sub- 

 ovate knob. Body narrow, subcylindrical. Head subquadrangular ; nose 

 transverse, separated oy an indistinct obtusangular line, anteriorly reflexed; 

 rhinarium transverse marked with a transverse series of rather large punc- 

 tures ; eyes prominent ; canthus entering : prothorax hexagonal, the sides 

 being obtusangular : scutellum rounded at the vertex, dilated at the base : 

 elytra linear, rounded at the apex, obsoletely ridged, wrinkled ; epipleura 

 vertical, narrow : legs rather slender ; hind legs long ; cubit tridentate ; 

 tarsi filiform  claws equal, all bifid at the apex : podex subtriangular. 



[134.] This genus evidently belongs to the same family with Macrod- 

 actylus, from which it is distinguished by having its maxillae armed only 

 with two teeth, the last joint of its palpi of a different shape, and its 

 labium approaching to a square form : whereas in the latter genus the 

 maxillae are more conspicuous and armed with three teeth, the last joint 

 of the palpi is subovate, and the labium is oblong and channelled. 



The species of this genus, as far as at present known, appear to be 

 confined to the more northern parts of the new world ; I have seen none 

 south of the province of Massachusetts, from whence I have received 

 specimens both from Dr. Harris and Mr. Drake. Type of the genus 

 Melolontha linearis Herbst. 



182. Dichelonycha Backii Kirby. — Plate ii., fig. 6. — Length of 

 body 4*^ lines. Several specimens taken in Lat. 54 . 



Body black, glossy, hairy, especially underneath, with white decumbent 

 hairs ; above thickly and coarsely punctured. Nose much reflexed, mar- 

 gin entire ; stalk of the antennae chestnut ; elytra silky, green, more or 

 less bronzed. 



Variety B. Antennae rufous. Tarsi pale chestnut. [Taken on 

 north shore of Lake Superior by Agassiz's Expedition.] 



183. Dichelonycha virescens Kirby. — Length of body 4^ — 5 

 lines. Taken in Canada by Dr. Bigsby, in Nova Scotia by Dr. Mac 

 Culloch, in Massachusetts by Dr. Harris, and in Pennsylvania by Dr. 

 Horsfield. Dr. Bigsby found it common on the different species of Salix. 



[135.] Body piceous, thickly covered underneath, except the disk of 

 the breast and abdomen, with decumbent snowy hairs, minutely punc- 

 tured, punctures most numerous on the upper side. Head nearly black, 

 covered with glittering decumbent hairs ; nose very obtuse and almost 

 truncate, less reflexed than in D. Backii, reflexed part obscurely rufous ; 

 rhinarium, underside of the head, and mouth with its organs, rufous ; 



