ONTHERUS.— PINOTUS. 51 



Chontales {Belt) ; Costa Kica, Volcan de Irazu, Eio Sucio (Rogers) ; Panama, Volcan 

 de Chiriqui (Champion). — South America, Eastern Peru 1 . 



The varieties or lower developments of the male are not distinguishable from the 

 female otherwise than by the tridentate anterior tibiae. 



Erichson's description fits exactly the common form of the female of this widely- 

 distributed species, in which the edge of the thoracic declivity has two obtuse tubercles. 

 Well-developed and rarer individuals of the same sex have four, as in 0. mexicanus, 2 , 

 from which they are distinguishable only by the shallower crenate-punctate stria? of 

 the elytra. The thorax has no dorsal impressed line and the lateral fovea is simple. 

 The male differs widely from the corresponding sex of 0. mexicanus. 



4. Ontherus brevipennis. (Tab. III. fig. 6.) 



Ontherus brevipennis, Harold, Col. Hefte, ii. p. 97 \ 

 Eab. Panama (M'Leannan). — South America, Colombia K 



PINOTUS. 



Pinotus, Erichson, Archiv fur Naturg. 1847, i. p. 108; Lacordaire, Gen. Col. hi. p. 98. 



A genus peculiar to the American continent, and of wide distribution in temperate 

 as well as in tropical latitudes. Sixty species have been described. 



1. Pinotus yucatanus. (Tab. ill. fig. 9, $ .) 



Inter minores ; piceo-niger, nitidus ; clypeo bidentato, ruguloso, vertice punctato impresso, tuberculo conico 

 obtuso ; thorace fere laevi, basi sulculo sat acuto laevi usque ad marginem lateralem continuato nee dilatato 

 et omnino impunctato, angulis posticis distinctis, margine laterali ante angulum sinuato; elytris sat 

 profunde striatis, striis subtiliter crenato-punctulatis, interstitiis convexis ; metasterno basi et lateribus 

 sparse grosse setifero-punctato. 



<$ ? Sat anguste oblongo-ovatus. 



$ ? Late oblongo-ovata. 



Long. 12-15 millim. 



Eab. Mexico, S.W. Yucatan (Dr. Horn, coll. Bates) ; Nicaragua, Chontales (Belt). 



Belongs to the group of small species, with undifferentiated sexual characters in the 

 armature of the head and thorax, of which many have been insufficiently described. The 

 present species seems to be very similar to P. inaclms of Erichson, the vertex having a 

 shallow depression behind the simple and short tubercle, as I infer from the description 

 of that author, " capite ruguloso, tuberculo frontali postice impresso ; " a description 

 equally applicable if it refers to the tubercle, which in the male is concave behind. 

 Erichson, however, does not mention the marginal groove of the thorax, the narrowness 

 and perfect smoothness of which are very characteristic of P '. yucatanus, the numerous 

 allied species from the northern parts of South America which I have examined having 

 the groove punctured or punctured and widened. A female specimen from Yucatan 

 is figured. 



