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XXI. iEgognathus Waterhousei, a new genus and species 

 of Dorcidse from Peru. By Franz Leuthner, Ph.D. 



[Read November 7th, 1883.] 



Plate XXI. 



iEGOGNATHUS, n. g. 



Similar in appearance to /Eg its, but is most allied to 

 Lissotes and Alcimus. 



$ . Body flat. Head flat, quadrangular, much 

 broader than long, the anterior frontal margin a little 

 emarginate, without epistoma, straight at the sides. 

 Eyes rather large, open ; canthus of the same oblique ; 

 the swelling in the cheek behind this rounded, not 

 prominent. Mentum broad and short ; gula strongly 

 convex. Prothorax broader than the head, broadest in 

 front, narrowed towards the posterior angles ; the ante- 

 rior angles acute ; the posterior angles rounded off, and 

 in continuation of the flexuous line of the posterior 

 margin. Prosternal process flat, acuminate. Elytra 

 longer than the head and prothorax together, narrower 

 than the prothorax, straight at the shoulders, with 

 pointed humeral angles ; flat. Femora of the posterior 

 legs inflated in the middle. Tibiae of the intermediate 

 and posterior legs unarmed. 



Mgognatlius Waterhousei, n. s. (PL XXL, fig. 3). 



$ . Entirely black, upper side dull, under side shin- 

 ing. Mandibles as long as the head and prothorax 

 together, their appearance calling to mind Mgus ; 

 strongly bent inwards, terminating in a blunt point, in 

 the middle with a strong upward directed acuminate 

 tooth, which, when the mandibles are closed, does not 

 reach the corresponding tooth of the other mandible ; 

 at the base with three small approximate teeth perpen- 

 dicularly arranged. Head and prothorax dull. Elytra 

 reticulate-punctate, the punctures forming irregular 

 lines ; black, with a bluish bloom (as in Sclerostomus 



TRANS. ENT. SOC. 1883. — PART IV. (NOV.) 



