NORTH AMERICAN COLEOPTERA. 209 



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1*. qiie<liiniis n. sp. — Black, elytra re<l.legs piceous; antenna^ a.s long as the 

 head and thorax, three basal joints piceous, outer joints much paler, joints 5-10 

 broader than long ; head moderately large, sub-quadrate, slightly narrowed behind 

 the eyes, hind angles not punctulate; thorax sub-quadrate, very little wider than 

 the head, not longer than wide, very slightly ai"cuately narrower to the front, dor- 

 sal punctures three, rather small ; elytra very little wider than the thorax, con- 

 jointly nearly square, shining, almost smooth, the punctures few and distantly 

 placed, scarcely pubescent; abdomen very sparsely punctate; beneath much more 

 coarsely and abundantly punctate. Length .24 inch; 6 mm. 



Male. — Tarsi filiform; last ventral feebly but broadly emarginate, penultimate 

 ventral with a small brush of stiff' hairs at middle. 



Female. — Tarsi filiform ; last ventral entire. 



Tliis species has many peculiarities which make it very easily known. 

 The elytra are smooth and with probably tiner punctures than in any 

 species known to me. The brush of hair on the penultimate ventral of 

 the male is cmtirely unique in our fauna. 



[ have seen but two specimens from Detroit and Kansas. 



P. SOr(li<lii!$ Grav. — Black, elytra slightly aeneous ; antennas piceous, shorter 

 than the head and thorax, joints 6 10 not longer than wide, the outer ones quite 

 transverse: head quadrate, not narrowed behind the eyes, hind angles not punc- 

 tulate: thorax not wider than the head, a little wider than long, not narrowed in 

 front; sides slightly sinuate, dorsal punctures three, moderately deep and equi- 

 distant; elytra a little wider than the thorax, conjointly nearly square, rather 

 coarsely but not densely punctured, the punctures somewliat muricate; surface 

 shining, very sparsely pubescent ; abdomen more finely and much more sparsely 

 punctured than the elytra: beneath sparsely punctate. Length .22 — .:-'.0 inch; 

 5.5 — 7.5 mm. 



Male. — Anterior tarsi filiform ; last ventral with a feeble emargination of ova^ 

 form, surrounded by a very narrow depression. 



Female. — Tarsi filiform; last ventral entire. 



In the vast majority of specimens before me the sexes do not differ 

 greatly in the form of the head. Rarely males occur with a very large 

 head, much wider than the thorax. In these latter the sides of the 

 elytra are so suddenly deflexed as to have quite an acute margin extend- 

 ing nearly two-thirds forwards. This character I do not find mentioned. 



Occurs in Canada, Michigan, Colorado, A'^ancouver and California. It 

 is quite commcm in Europe, extending to Siberia. 



P. ce|>lial<»tes Grav. — Black, elytra slightly bronzed; antennae piceous, as 

 long as the iiead and thorax, joints 5-10 sub-quadrate: head quadrate, hind angles 

 not punctulate; thorax not wider than the head, very little longer than wide, not 

 narrowed in front ; sides slightly sinuate, dorsal punctures three, equidistant, fine ; 

 elytra wider than the thorax, conjointly nearly square, sparsely and not coarsely 

 punctate, shining, very sparsely pubescent ; abdomen sparsely punctate, the punc- 

 tures coarser than those of the elytra ; beneath more densely punctate, especially 

 on the basal segments. Length .24 — ..'5(1 inch; 6 — 7.5 mm. 



TRANS. AMKR. KNT. SOC. .\l. (53; .ll'NE, 1884. 



