78 



TIIOS. h. CASEY. 



NARTIIE€I1JN Lee. 



M:iii<lil)los l)i(l(Mitiite at the tip; iiiiitli mid tenth joints of antennae fliittened ; 

 eleventh elongated, not flattened, fusiform and acnuni late at tip; second joint of 

 lnUial palpi enhirgod anil compressed: third joint elr>ngated and fusiform. Last 

 joint of maxillary jialjii oldngatod, sliglitly lioiit and prolongeil in a narrow suh- 

 cvliiidrioal propossJ. Kyes on siile of head, very flat and nearly circular; side pro- 

 cesses on under surface of heail. resei.ibling the jugular pieces if the I'lissandrinae, 

 feebly developed. 



W(> have Imt one species. 



I. N. );rail<li(*e|IM Lei\— Body elongated, cylindrical, deep hiackish casta- 

 neous. Head slightly larger than the prothorax which is plainly margined ; j)unc- 

 tuiltion line; iniddle of frf)nt projected forward into a short horn-like process; 

 upper surface |irovi(led with two lateral elevated ridges and luie median furrow, 

 none of which attain the posterior mari^in ; there are also two small hut very dis- 

 tinct anterior, lateral ridgea which converge toward the horn like process. Man- 

 dibles very large, evenly arcuate, atid dentate internally. Eyes snuill, flat and 

 more visible from above than below, rather finely granulated. Antennae slightly 

 longer than head, enlarged toward tlie tij). Prothorax narrower posteriorlv ; 

 sides nearly continuous with those of head, punctures finer and closer than on 

 head: antt>rior angles not pronounced; posterior angles acute. Elytra entire, a 

 little longer than the liead and prothorax together, and almost imperceptibly ricler 

 than the latter; sides parallel ; evenly rounded behind: not punctured, but liav- 

 ing faint longitudinal ri<lges. Scutellum evenly rounded behind. Fifth joint of 

 tarsi ornamented witli ridges or striae. 



Plate IV. Fi-r. 1:5. and Plate V. Fij:. 1. 



This eiirioiis species is (»t' sneli excessive rarity that as far as my 

 kiiKwledp' exletids. only tliree speciincn.s are known in the collet-tions of 

 the I'liited Stiites ; one a inutihited male in th(; cabinet of Dr. Le(\>nte 

 from Peniisylvaniii. another in a private collection in (Cincinnati, and the 

 third, a perf«'ct specimen in that of Dr. Horn. The descriptions and 

 fionres hiive l)een taken froiu tlie hitter, which wa.s obtained in Nevada. 



PKDIACUN Schuck. 

 Mentum short, strongly eiinirginate, with the interior angles acute. Ligula 

 bilobed anteriorly. Inner lobe of maxilla ciliated at its extremity. Last joint 

 of maxillary palpi acuminate, that of the labial palpi oval. Labrum rounded in 

 front. Head triangular, joined to piol borax by a short and very broad neck. Eyes 

 moderate in size and very convex, situated at the posterior angles of the head. 

 Antennae short and rjbust: last three joints suddenly enlarged, forming a loose 

 irlub. Prothorax sub-quadrate, not nmrgined; sides serrulate, or undulated. Ely- 

 tra clepressed, covring entire abdomen, and evenly rounded behind. Tarsi iietero- 

 mcrous in the male, and pentamerous in the female: first joint very small. Body 

 elongated and very depressed. 



Otir species ;ire two in imniber, and may be distinfjuished jis follows : 



Sides of proiliorax arcuate and feebly unilulated : punctuation extremely dense. 



I. fllNCIIN. 

 Sides of pnnhorax nearly siraii;ht, and iicutely. though rather feebly serrulate. 



2. depresfins. 



