338 



REVISION OF THE TENEBRIONID^B OF AMERICA, 



well developed. The middle lobe is also prominent along the middle and in front, the 

 lateral lobes with acute angles. The epipleurse extend beyond the last ventral suture. 

 The hind coxse though rather widely separated, have the intercoxal process oval, rounded 

 in front. The males have the tibia- more strongly arcuate than the other sex, the hinder 

 fibia 1 being armed near the tip with an acute tooth. The femora in both, sexes are 

 strongly clavate and slightly flattened. The only species known is winged. 



M. Isevis, Oliv., (Tenebrfo) Bnt, 8, 10. (Merinus) Lee, loo. oit., p. 381. 



A large, elongate, sub-opaque, black insect, found not uncommonly under bark in the 

 Eastern and Middle States, and more rarely in Canada. Easily known by its clavate 

 femora and the peculiar armature of the hinder tibia' of male. 



Length .70-1.04 inch. 



PACHYTJRGTJS, Lee. 

 Pachyttrgus, Lee., Class. Col. N. Amer., i>. 880. 



Differs from the preceding genus, in the mentum being nearly fiat in the middle and 

 emarginate in front, with acute angles. The femora are also clavate. The oidy specimen 

 known to me is a female; the males may have the posterior tibia' armed in Merinus. It 

 is doubtful whether these two genera should be retained as distinct. The genera of Tene- 

 brionini differ generally so slightly from each other that these may be retained as distinct 

 until the male shall become known to us. 



P. mriMis, Mcls., (Iphthimwi) Pi'oo. Acad. 8, 85. Leo., {Pachyurgw) loc. cifc., p. 281. 



This speeies is similar in form to M. Icevis. It has a metallic bronzed, shining surface. 

 The elytra have stria' with fine punctures, becoming rather less evident on the sides and 

 at the apex. 



Length .02 inch. 



The specimen in the cabinet of Dr. Leconte is the type of Melsheimer, and the only 

 one known. It is probable with this, as has already been discovered with other species, 

 that the insect is a foreign (South American'?) form introduced by mistake, and described 

 as North American. 



UPIS, Fabr. 



Upis, Fabr., Ent. Syst. II, p. 75. 



In this genus the mentum is oval, prominent in front, with a median longitudinal ele- 

 vation and a, groove on each side. The femora, though thickened, are not so suddenly 

 nor so strongly clavate as in the two preceding genera. The epipleuree are not complete 

 behind, though reaching beyond the last ventral suture. 



U. ceramboides, Linn., (Attelabus) Syst, Nat. II, p. 021. Fab., (Upis) loc. cit. reticulata, Say, Long's Ex- 

 pect. 2, 879. 



This species common in Europe, is also found abundantly in the northern portion of 



our own Continent, occurring as far south as Canada. 

 Length .54-. 75 inch. 



