ONTHOPHAGUS. 79 



In what appears to be the well-developed male of this singular species the posterior 

 carina of the head is curved anteriorly in horseshoe-shape, and advances (becoming 

 more sharply raised) beyond the usual situation of a frontal carina, traces of which are 

 seen on the sides. The front edge of the clypeus is reflexed, and forms two rounded 

 teeth ; between these frontal teeth and the gense the clypeal margin is strongly flexuous, 

 and the gense are rounded and sublobate. The large thoracic prominence is nearly 

 straight and somewhat sharp on its front edge ; the latter overhangs the anterior margin 

 of the thorax, and is rectangular at either extremity. A male from Cordova is figured. 



32. Onthophagus cyclographus. 



O. corroso quoad colorem et sculpturam simillimus, differt solum capitis thoracisque armatura, thorace utroque 



sexu antice bicurvatim carinato carinaque tri-tuberculato. 

 c? minor vel effoeminatus ? Caput bicarinatum, carina anteriore subtili, posteriore recta ; clypeus grosse 



punctatus vix rugulosus. 

 2 ■ Caput carinis duabus rectis ; clypeus punctato-rugosus. 

 Long. 5 \ millim. 



Hab. Guatemala, San Joaquin, Balheu (Champion). 



The carina of the anterior part of the thorax is sharply defined, and describes two 

 curves, the middle projecting forward further than the two extremities, and like them 

 forming a thickened tubercular angle. In clung in pine-woods (Champion). 



33. Onthophagus coscineus. 



0. corroso affinis ; multo minor, subovatus, fuligineo-niger, pedibus piceo-rufis, opacus, erecte setosus, capite 



( $ ? ) et thorace crebre rotundato-punctulatis (nee annulatis) ; elytris nitide punctulato-striatis, interstitiis 



paullo convexis, sericeo-alutaceis plerumque uniseriatim setiferis. 

 C? . Caput planum ; clypeus margine apicali abrupte reflexo et sub-bidentato ; genis rotundatis ; vertice tuber- 



culis duobus transversis. Thorax juxta marginem anticum medio tumidulus. 

 $ . Caput bicarinatum ; clypeo brevi, late et breviter reflexo-bidentato. Thorax juxta marginem anticum 



medio convexus. 

 Long. 3|-5 millim. 



Hab. Panama (coll. Bates), Volcan de Chiriqui (Champion). 



The punctures of the thorax are not ring-shaped impressions as in the two preceding 

 species, but simple punctures, and, like those of the head, they lie very near together. 

 The apex of the clypeus in the male is reflexed in trapezoidal form, with the upper 

 edge strongly sinuated ; in the female the reflexed edge is much less elevated, and forms 

 two broad and rather distant teeth. 



34. Onthophagus CUboidalis. (Tab. VI. figg. 3, 6 ; 3 a, side view of head and 

 thorax.) 



.<$ . Crassus, cuboidalis, niger, politus, sparsim setosus ; capite lato, subtiliter punctulato, clypeo concavo, margine 

 laterali fere rectangulo, anteriore rotundato, medio obtuse truncato, carina anteriore subtili, vertice carina 

 alta erecte bicornuta ; thorace magno, lato conspicue punctato, punctis minoribus intermixtis, linea dorsali 

 lasvi, base depresso 'aevi, dorso anteriore triangulariter truncato, declivitate anteriore verticali ; elytris valde 



