TENEBRIONIDAE. 23T 



Group. I.— Pentaphylli. 



Eyes entire, not emarginated by the sides of the front ; an- 

 tennas with the last five joints abruptly larger than the preceding, 

 forming a loose elongate club. 



One species of Pentaphyllus from Pennsylvania is known to 

 me. The genus is distinguished by the eyes being rounded, not 

 transverse. 



Group II.— Diaperes. 

 The transverse eyes are deeply emarginated by the sides of the 

 front, and the antennas, however much thickened externally, are 

 not terminated by a club composed of abruptly larger joints. 

 The species are numerous and live in fungi, either those of ex- 

 ternal growth, or those developed under bark. 



1st joint of hind tarsi equal to the 2d. Diapeeis. 



1st joint of hind tarsi equal to 2d and 3d. Hoplocephala. 

 1st joint of hind tarsi longer than 2d and 3d ; 



Intercoxal process of abdornen acute. Plattdema. 



Intercoxal process of abdomen broad. Scaphidema. 



These genera are all represented in the Atlantic States : Pla- 

 tydema is the only one thus far known in the Pacific district. 

 Scaphidema Redt. has for a synonym Nelites Lee. 



Tribe XIII.— ADELINIrYI. 



Body of varied form ; head received in the thorax as far as 

 the eyes, which are coarsely granulated, transverse, and emargi- 

 nate, except in Dicedus ; front dilated at the sides over the base 

 of the mandibles, separated from the labrum by a sub-coriaceous 

 clypeus ; antenna? thickened externally ; mentum small, trape- 

 zoidal ; ligula prominent. Elytra with narrow epipleurse. An- 

 terior coxae nearly rounded ; middle coxae without trochantin, 

 inclosed by the sterna ; hind coxae slightly separated ; intercoxal 

 process triangular ; legs moderate ; tibial spurs distinct ; tarsi 

 pubescent beneath ; the first joint short in Hypophloeus and 

 Dicedus, elongated in the other genera. 



I have placed in this new tribe a few genera which cannot be 

 associated with Ulomini on account of the distinct clypeus, nor 

 with Diaperini or Helopiui, because of the absence of the trochantin 

 of the middle coxae. The form of body is very different in the dif- 

 ferent genera ; thus, Adelina is very flat, almost like Lasmophloeus 



