424 Goleopterological Notices, V. 



at apex and the anterior tarsi feebly dilated and densely pubescent 

 beneath. If the usual definition of the genus is to hold, these two 

 species will have to be separated because of the marked tarsal dif- 

 ferences. 



The following species have the body slender, parallel, subimpunc- 

 tate and opaque or alutaceous, with the fourth joint of the maxil- 

 lary palpi slender, cylindrical, much narrower than the third and 

 somewhat more or less than twice as long; they constitute the 

 subgenus Phlceonomus of Heer : — 



Fourth palpal joint shorter, oue-half longer than the third. Arctic. 



lappoiiiciim 

 Fourth palpal joint twice as long as the third or very slightly longer. 

 Posterior tarsi distinctly more than one-half .as long as the tibiae. 



Surface opaque, strongly granulato-reticulate ; prothorax very nearly as 



wide as the elytra. European subarctic pusillum 



Surface much more shining, alutaceous, more coarsely and feebly reticu- 

 late ; prothorax much narrower than the elytra ; setae of the latter 



longer and more visible. American subarctic laesicolle 



Posterior tarsi not more than one-half as long as the tibiae ; legs longer ; 

 body much broader, feebly shining, alutaceous. American subarctic. 



SllffUSUItl 



Pusillum is simply included for comparison ; it is closely allied 

 to laesicolle but is distinct and does not appear to inhabit North 

 America. 



O. SUffllSllIIl n. sp. — Suboblong, depressed, feebly shining, black, the 

 legs and elytra rufous, the latter suffused w^ith black near the scutellum and 

 each external apical angle ; antennae fuscous, pale in ba-^al half; integuments 

 subglabrous ; elytral setae minute, erect, distinct under a power of 80. Head 

 small, wider than long, three-fourths as wide as the prothorax ; eyes large, 

 convex ; tempora feebly arcuate, short, strongly convergent to the nuchal 

 constriction ; ocelli distinct, on the edge of the constriction, separated by 

 scarcely more than one-fourth of the total width ; surface impressed before 

 each, also broadly, strongly impressed at each side of the large rounded 

 clypeus ; antennae a little longer than the head and prothorax, outer six joints 

 abruptly stouter, six to ten strongly transverse. Prothorax four-fitths wider 

 than long ; sides subparallel, feebly arcuate, slightly convergent and scarcely 

 sinuate toward base ; disk subimpunctate, explanate at the sides, more broadly 

 toward base, also with two broad strong median impressions extending but 

 slightly beyond the middle and a very feeble median impression at the apex. 

 Elytra quadrate, one-fourth wider than the prothorax and twice as long, nearly 

 as long as wide, much longer than the head and prothorax ; humeri extremely 

 narrowly exposed; sides parallel; disk very sparsely and obsoletely punc- 

 tate. Abdomen as wide as the elytra and rather shorter, somewhat strongly 



