76 LAMELLICOENIA. 



This species is labelled in the Salle collection 0. posticus (Chevr.), under which MS. 

 name it is probably known in other collections. Dull-coloured examples with unspotted 

 elytra are distinguishable from 0. anthracinus only by the stronger punctuation of the 

 thorax and more uniform convexity. A male example from the Volcan de Chiriqui is 

 figured. 



24. Onthophagus hbpfneri. 



Onthophagus hbpfneri, Harold, Ann. Soc. Ent. Fr. 1869, p. 512 \ 



Hal. Mexico, Vera Cruz (Salle 1 ), Tonila, Iguala, Acapulco, Tapachula in Chiapas 

 (Edge) ; Nicaragua (Salle). 



Very closely allied to the preceding, from which it differs in its smaller size, and in 

 the elytra being yellow, with dark markings on the disc of each. 



25. OnthophagUS longimanus. (Tab. V. figg. 22, 6; 22 a, side view of head 

 and thorax.) 



Obscure viridi-aeneus vel cuprascens, nitidus, calvus, tarsis rufo-piceis ; thorace conspicue punctato ; elytris 



crenulato-striatis, interstitiis subtiliter disperse punctulatis. 

 S . Caput latum, inerme, subtiliter sparsim punctulatum, clypeo antice late reflexo, genis rotundato-sublobatis. 



Thorax antice verticalis supra 4-tuberculatus, tuberculis duobus iutermediis approximates et antice pro- 



ductis. Tibiae anticae valde elongatae, subfalcatae. 

 5 . Caput crebrius punctatum ; clypeo punctato-ruguloso, margine antico haud reflexo, leviter sinuato ; genis 



rotundato-sublobatis. 

 Long. 6 millim. 



Hab. Mexico, Cordova (Salle). 



In well-developed males the two middle tubercles of the thorax are produced as a 

 binodular central lobe overhanging the hind part of the head. In lesser developments 

 they are much reduced, and scarcely overhang the front edge of the thorax ; the lateral 

 tubercle on each side is distant from, and posterior to, the central pair, and is never 

 distinctly prominent. 



26. Onthophagus chryses. (Tab. V. figg. 23, 6 ; 23 a, side view of head and 



thorax; 24, $ .) 



Lsete viridi-ameus, glaber, politus, elytris fulvo-auratis, interdum aeneis ; thorace disperse punctulato ; elytris 



subtiliter crenato-striatis, interstitiis sparsim punctulatis ; tarsis fulvo-piceis. 

 3. Caput inerme, disperse punctulatum; clypeo margine antice late reflexo et truncato; genis angulatis. 



Thorax medio juxta marginem tri-tuberculatus. Tibiae anticae valde elongatae, subfalcatae. 

 S effceminatus. Caput grossius punctatum ; clypeo vix reflexo, emarginato, vertice breviter carinato. Thorax 



antice sicut in 5 , obsolete tri-tuberculatus. 

 $ . Clypeus bidentatus vel angulatim emarginatus, haud reflexus, supra rugoso-punctatus. Thorax antice juxta 



marginem obsolete tri-tuberculatus. 

 Long. 6| millim. 



Hab. Mexico, Cordova (Salle) ; Guatemala, Zapote (Champion) ; Panama, Volcan de 

 Chiriqui, Bugaba (Champion). 



