424 Goleopterological Notices, V. 



at apex and the anterior tarsi feebly dilated and denselj^ 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 Phloeonomus of Heer: — 



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



lapponiciiiu 



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 ; setsB of tl)e latter 



longer and more visible. American subarctic laBSicolle 



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

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



suffusiim 



Pusillum is simply included for comparison ; it is closely allied 

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

 America. 



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

 legs and elytra rufous, the latter suflfnsed with black near the scutellum and 

 each external apical angle ; antennae fuscous, pale in basal half; integuments 

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

 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 tlie 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-fifths wider 

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

 sinuate toward base ; disk subimpunctate, explaiiate 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-fourlh wider tlian 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 



