ONTHOPHAGLJS. SI 



senescens, sericeus, supra insequalis breviter flavo-setosus ; capite (<S 2) crebre punctato-mgoso, carina 

 posteriore subtili biarcuata ; tborace punctis sat magnis umbilicatis et minoribus intermixtis, basi crenato- 

 marginato: elytris nitide punctulato-striatis, interstitiis planis, pauciter et subtiliter punctulatis. 



J . Clypeus latus, margine laterali plus minusve angulato, antice late rotundato reflexo ; carina anteriore nulla. 

 Tborax dorso antice triangulariter gibboso, medio angulato (baud obtuse producto). 



c? effceminatus. Clypeus semicircularis. Thorax gibber parum distinctus. 



2 . Caput bicarinatum, clypeo sat elongato et angustato. Thorax antice medio convexum utrinque tuberculo 

 nitido. 



Long. 5-8 millim. 



Hab. Mexico, Chiapas (Salle); Guatemala, Totonicapam 9000 to 10,500 feet 



(Champion). 



A large series of examples. The Salle collection contains a single female specimen 

 from Chiapas with the thorax less strongly punctured. 



40. Onthophagus anreo-fuscus. 



O. totonicapamo affinis ; breviter quadrato-ovatus, terreno-fuscus aureo- vel seneo-tinctus, sericeo-opacus, supra 

 insequalis, breviter setosus ; capite punctato-rugoso ; tborace sat grosse irregulariter umbilicato-punctato 

 punctis metallieis, basi punctulato-marginato ; elytris striatis, striis grosse punctatis, interstitiis granulatis ; 

 pygidio opaco, umbilicato-punctato. 



d . Clypeus latus subquadratus, concavus, antice late rotundatus, genis rotundatis ; carina posteriore acuta 

 arcuata. Thorax sicut in O. totonicapamo J , dorso antice triangulariter gibboso, medio angulato sub- 

 compresso. 



c? minor. Clypeus late rotundatus, carina posteriore subobsoleta biarcuata. Thorax gibber antico medio 

 obtusiore. 



2 . Clypeus elongatus angustatus, apice sinuato ; carina anteriore subtili, posteriore (sicut in S 2 O. totoni- 

 capamo) biarcuata. Thorax medio antico convexo ibique utrinque tuberculo glabro. 



Long. 6|-7| millim. 



Hab. Mexico, Parada (Salle). 



Very nearly allied to O. totonicapamvs, but differing in its light brown colour, with 

 pervading metallic tint, inclining to golden, but scarcely shining. The shallow circular 

 punctures of the thorax are larger, and irregularly scattered over the surface, the spaces 

 between the punctures being very uneven ; and the elytral interstices are granulated. 

 The well-developed males are further distinguished by the simply arcuated posterior 

 carina of the head. 



41. OnthophagUS Cyanellus. (Tab. VI. figg. 6, 6 ; Qa, side view of head and 

 thorax.) 



O. chevrolati affinis. Atro-cseruleus, brevissime setosus, subopacus ; thorace confertim punctulato, punctulis 

 majoribus et minoribus intermixtis, medio basi marginato ; elytris subtiliter punctulato-striatis, interstitiis 

 planissimis, subtilissime punctulato-setiferis. 



cJ major. Clypeus latissimus et brevissimus, utrinque fere rectangulus, margine antice late arcuato ; carina 

 posteriore arcuata, medio interrupta, extus utrinque in spin am brevem producta. Thorax margine ante 

 medium reflexo-angulato angulisque auticis acutis ; dorso anteriore valde gibboso, gibbere medio lato 

 obtuso (fere sicut in $ O. retuso majore). 



J minor. Clypeus brevis, semicircularis ; carina extus acuta sed haud producta. Thorax angulo marginali 

 haud reflexo, gibbere dorsali medio minore et magis rotundato. 



biol. centr.-amer., Coleopt., Vol. II. Pt. 2, August 1887. MM 



