ONTHOPHAGUS. 77 



The single Mexican male example has a more coarsely punctured thorax and golden- 

 green elytra, the latter more strongly sculptured. The single male example from 

 Guatemala is intermediate in sculpture between the Mexican and the Chiriqui form ; 

 it has the elytra bluish-green, with tawny spots at the shoulders and at the middle 

 of each side. We figure a typical pair from the Volcan de Chiriqui. 



27. Onthophagus anthracinus. 



Onthophagus anthracinus, Harold, Col. Hefte, xi. p. 104 \ 



J 1 major. Caput supra absque carinis, medio laeve, clypeo late reflexo margineque sinuato. Thorax prope mar- 

 ginem anticum lobo mediano obtuse triangulari. Tibiae anticae elongatae, curvatae, apice longe penicillato. 



S minor, vel effceminatus. Caput minus laeve, carina verticis brevi ; clypeo parum reflexo, late bidentato. 

 Thorax lobo anteriore vix producto, lato, depresso. Tibiae anticae minus elongatas. 



5 . Clypeus late bidentatus nee reflexus : thorax sicut in S minore, lobo haud producto, lato, depresso. 

 Long. 4-6 millim. 



Hob. Mexico, Orizaba, Puebla, Juquila, Parada, Guanajuato (Salle), Jalapa, Oaxaca 

 (Hbge) ; Guatemala 1 , Quezaltenango, Mirandilla, Zapote, Capetillo, Duerlas, Aceytuno, 

 San Geronimo (Champion) ; Costa Rica, Volcan de Irazu (Rogers) ; Panama, Volcan de 

 Chiriqui (Champion). 



A small, dull black species, coppery in front, opaque, with a slight silky gloss ; the 

 thorax unequal on its surface, and its punctures scattered, and more or less distinctly 

 ring-shaped and setiferous. The surface of the elytra is also beset with distinct punc- 

 tures, from each of which rises a tawny bristle. The gense are rotundate, sublobate, 

 and together with the clypeus (in the male) sprinkled with large punctures, the clypeus 

 in the female closely punctate-rugose. The head is unarmed in both sexes, and bicarinate 

 in the female. 



28. Onthophagus igualensis. 



0. landolti affinis. Multo minor, viridi-aeneus, nitidus, corpore subtus pygidioque nigris, tarsis rufeseeatibus ; 



dense breviter setosus ; thorace grosse discrete punctato, basi distinctius marginato ; elytris punctulato- 



striatis, interstitiis biseriatim setifero-punctatis ; pygidio grosse punctato. 

 $ major. Caput planum, sublaeve ; genis sublobato-rotundatis, grosse punctatis ; clypeo sat elongato angustato, 



cum apice elevato, emarginato et sub-bidentato. Thorax antice medio tuberculo conico acuto. 

 J 1 minor. Clypeus parum elongatus, subtiliter transversim rugulosus, vertice breviter carinato. Thorax medio 



antice vix prominens. 

 5 . Clypeus brevis, transversim rugoso-punctatus, apice sinuatus, fronte bicarinato. Thorax inermis. 

 Long. 3-4 millim. 



Hah. Mexico, Iguala and Chilpancingo in Guerrero (Hoge). 



Besides its small size and stronger punctuation, this differs from the allied species in 

 the hind margin of the thorax, which, viewed from behind, appears to be distinctly 

 margined. In all the numerous examples (except one from Iguala) there is no trace of 

 pale markings. 



