COLEOPTERA— CAEABID^. 535 



NEOTHANES gen. iiov. (yto?, GytjaKco). 



Allied to Carabus, and belonging to the same tribe, Carabini. It differs 

 from it in some marked features of the head, but agrees better with it than 

 with the Cychrini, in which it was formerly placed. The head is unusually 

 broad and short, the width between the base of the not very prominent 

 round eyes being nearly twice as great as the length' from the center of the 

 eyes to the mai'gin of the labrum, while the burial of the head in the pro- 

 thorax up to the base of the eyes renders the brevity more apparent ; the 

 labrum is entire, its base just in front of the insertion of the antennae ; man- 

 dibles shorter and stouter than in Carabus and Calosoraa, arcuate, untoothed ; 

 tip of maxillfe just as stout as (though probably thinner than) the apex of 

 the mandibles. The head does not appear to be constricted behind the eyes, 

 though but little of that portion can be seen in the single specimen which 

 preserves this part. Prothorax and elytra as in Carabus, excepting that the 

 latter have no foveas whatever, and the very numerous striai are straight 

 and the interspaces smooth and unbroken. 



Neothanes testeus. 



PI. 7, Figs. 32, 39. 



Cyohrua testeus Scudd., Bull. U. S. Geol. Geogr. Surv. Terr., IV, 758-7.=i9 (1878). 



This species was first described from the less perfect and more obscure 

 specimen of the two now before me. The better pi-eservation of the second, 

 with its thorax and other parts, shows that the species should be placed in 

 the Carabini rather than in the Cychrini. The stout and untoothed mandi- 

 bles leave no doubt on this point. 



The pronotum is broadest somewhat in advance of the middle and tapers 

 with about equal rapidity toward the front and toward the base, so that the 

 base is somewhat narrower than the front, the external angles well rounded ; 

 the front margin is nearly, the hind margin quite, straight, the former 

 scarcely angulate in the middle, the lateral angles slightly produced ante- 

 riorly ; there is a faint median carina, more pronounced in the middle, but 

 otherwise the thorax appears to be tolerably smooth, though laterally the 

 head is longitudinally subrugulose. The elytra have the humeral angle 

 well rounded off and the tip angulate ; the striae are close and crowded to 

 the number of about twenty-five on each elytron, shnrp and clean, but 



