or PHILADELPHIA. 147 



Body blackish or dark reddish-brown, tinged with brassy, punc- 

 tured : mandibles as long as the head ; inner side with a robust 

 emarginate tooth at base; an unarmed excavated interval in the 

 middle, and a dilated somewhat securiform tip, armed with about 

 six small teeth ; exterior edge with a rounded lobe at base, and 

 elevated angle near the tip : thorax margined, not distinctly sinu- 

 ous before the posterior angles : elytra punctured ; strias almost 

 obsolete and punctured : anterior tibia with more than ten inequal 

 very acute teeth. 



Length two-fifths of an inch. 



^'ery closely allied to Lucanus caraboides, and may possibly 

 prove to be only a variety of that species; but as far as I have 

 had an oppoi'tunity of comparing specimens, it diflFers from cara- 

 boides in color, in being rather more robust, and in being desti- 

 tute of the obtuse sinus or truncation near the posterioi' angles 

 of the thorax, which is observable in that species. The mandi- 

 bles of the female are shorter than those of the male, the inner 

 edge sometimes merely dilated and rectilinear, [250] terminating 

 in an angle near the tip } the lobe on the exterior edge, also, is 

 not apparent. 



It inhabits as far west as the Rocky Mountains. 



[Previously described by Weber as P. quercus. — Leg.] 



ZOPHOSIS Latr. 



Z. RETICULATA. — Black ; posterior angles of the thorax elon- 

 gated ; elytra irregularly reticulate. 



Inhabits near the Rocky Mountains. 



Clypeus eniai'ginate before : antenncB a little larger towards the 

 three exterior joints not rounded but truncated at tip, the ulti- 

 mate one subacute at tip, precisely resembling the corresponding 

 joint of Euri/cliora as represented by Herbst, (pi. 5.) and not 

 larger than the preceding joint: palpi, terminal joint a little 

 larger than the preceding one : mentum widely emarginate, nar- 

 rower at base, not concealing the base of the maxillae so much as 

 that of Pimdia hipunctata : thorax curvilinearly emarginated 

 before for the reception of the head ; punctures very minute, 

 distant ; anterior angles obtuse, somewhat prominent; margined 

 each side ; posterior angles elongated, acute, closely embracing 

 the humeral angles : scutel none : elytra with obtuse, elevated, 

 irregular, somewhat reticulated lines. 

 1824.] 



