NORTH OF MEXICO. 



373. 



TRIBE XXV- 



-HETEROTARSINI. 



Head not deeply inserted, eyes large, coarsely granulated. Antennse gradually thicker. 

 Middle; coxse with distinct trochantin. Tibial spurs small. Penultimate joint of tarsi 

 more or less bilobed. Tarsi with coarse pubescence beneath. 



These few characters will serve to render the tribe easy of recognition and separation 

 from any of the neighboring tribes. It appears more closely allied to the Tenebrionini 

 than to the tribes immediately preceding or following. The tribe is a small one, and com- 

 posed in our fauna of but three genera, easily known by tin 1 very coarse punctures with 

 which they are ornamented, and may be distinguished as follows: 



Antennse very gradually thicker ; epipleuree entire but narrower at tip ; 



body pubescent. an/edus. 



Antenna? with the last three joints larger. 



Margin of thorax denticulate ; body pubescent. paratenetus. 



Margin of thorax not denticulate ; body glabrous. PRATiEUS. 



AN^EDUS, Blanch, 

 Ansedus, Blanch., Hist,. Nat. Ins. IT, p. 85. 

 A. bi'unucus, Zieg., (Pandarus) Proc. Acad. 2, 45. 



The margin of thorax of this species is very distinct and reflexed, and the hind angles 

 prominent. 



Length .22 inch. 



Abundant under bark, in the Middle States. 



A. rotundicollis, Leo., Ann. Lye V, p. 150. 



The margin of thorax is very narrow, and the hind angles much less prominent than 

 the preceding species. 

 Length .17 inch. 

 From the Desert of the Gila River of Arizona. 



PA RATENETUS, Spinola. 

 Paratenetus, Spinola, Monog. Clerites, TI, p. 118. 

 P. punotatus, Solier, lor. cit., tab. 44, 1is^. 5. 



Thorax with sides rounded in front, gradually narrowing behind the middle. 

 Length .12-16 inch. 

 Abundant in the Middle and Eastern States. 



P. fusous, Leo., Agass. Lake Superior, p. 22:!. 



Differs from punctatus by smaller size, more robust form, more convex thorax and 

 elytra, the latter shorter and more rounded on the sides. The sides of the thorax are 



AMBRI. PH1LOSO. SOO. — VOL. XIV.— 94 



