Scarabseidae in the British Museum. 363 



impressa, antice abrupte declivi, parte elevata autice flexuosa, 

 parte declivi crebre fortiter granulosa, angulis anticis acutis, 

 extrorsum sinuatis, lateribus sat longe brunneo fimbriatis ; elytris 

 sat fortiter striatis, striis vix punctatis, interstitiis pauUo con- 

 vexis, sublsevibus ; pygidio basi subtiliter punctulato. 



(S . Capite pone medium cornu erecto brevi punctate ad apicera 

 bidentato. 



$ . Capite pone medium carina brevi obtusa leviter bidentata. 



Long. 9-10| lin. 



Hah. Uruguay ; Bolivia, 



This species is somewhat intermediate between P. crini- 

 collis a.nd P. Jimbriata. From crinicollis it differs in being- 

 more convex, with less long cilia3 at the sides of the thorax 

 and with the front of the clypeus almost quadridentate ; from 

 Jimh'iata it differs in having the disk of the thorax strongly- 

 punctured. The larger male from Uruguay has the cephalic 

 horn a little dilated at the apex and triangularly emarginate ; 

 the front margin of the raised part of the thorax quadd- 

 sinuate or quinque-lobate, the middle lobe slightly advanced, 

 with its angles incrassate. The smaller male from Bogota 

 has the cephalic horn narrower at the apex, and the thorax 

 has the front margin of the raised part less strongly qaadri- 

 sinuate, the middle lobe broad. A specimen marked 

 " Cordova," which appears to be the female of this species, 

 has the cephalic horn reduced to an obtuse ridge with its 

 angles slightly dentiform. The thorax has the disk less 

 raised, the front margin of the raised part forming one broad 

 arcuate lobe with a sinuosity on each side. 



EXPLANATION OF PLATE XI. 



Fig. 1. Hind leg of Onthocharis brevipes. 



