74 LAMELLICORNIA. 



Not larger than the smallest individuals of 0. lecontei, and the female very similar in 

 form to the same sex of that species. It is different in colour ; and in the absence of 

 pubescence, except a few hairs on the head and the fore part of the thorax. 



20. OnthophagUS Championi. (Tab. V. figg. 18, <?; 18 a, side view of head 

 and thorax ; 19, $ ; 19 a, side view of head and thorax.) 



0. guatemalensi affinis. Niger, antice viridi-aeneo tinctus, subnitidus, breviter setosus ; thorace conspicue (antice 

 asperate) punctulato, medio basi depresso, sublseve ; elytris subtiliter bilineatim-striatis, striis subtilissime 

 transversim punctulatis, interstitiis subconvexis; confuse asperato-punctulatis ; corpore subtus viridi-seneo 

 et metasterno antice compresso-conico. 



S . Caput sublseve, clypeo antice reflexo-acuminato, genis mediocriter rotundatis, carina anteriore subtili recta, 

 carina verticis arcuata utrinqne acute producta. Tborax dorso antico late producto-lobato, lobo apice recto 

 sat profunde triangulariter emarginato. Tibise anticae elongatse ; apice intus producto subacuto, vix 

 penicillato. 



$ ■ Caput bicarinatum ; clypeus semicircularis, marginibus perparum reflexis, supra rugosus. Tborax antice lobo 

 quadrato (angulis distinctis), parum producto. 



Long. 6-8| millim. 



Hah. Guatemala, Paraiso, El Eeposo, Zapote (Champion). 



A very distinct and apparently rare species of the 0. mexicanus group. The female 

 at first sight is liable to be taken for that of the common 0. curvicornis ; but the short 

 erect pubescence and the sculpture of the elytra will serve to distinguish 0. championi 

 on closer examination. In 0. curvicornis the strise are crenated ; and the punctures of 

 the interstices are simple and destitute of the hairs and accompanying granules 

 distinctive of the present species. 



A fully-developed male from El Eeposo and a female from Paraiso are figured. 



21. Onthophagus eulophns. 



O. mexicano affinis ; robustior et corpore supra granulato. Niger, sericeo-nitens, sparsim brevissime setosus, 

 tborace elytrisque passim sequaliter granulatis ; tboraee angulis anticis late rotundatis ; elytris punctulato- 

 striatis. 



S . Caput latum et breve, clypeo margine antico late et obtuse reflexo, genis rotundato-dilatatis, carina anteriore 

 subtili arcuata, carina verticis acuta utrinque acute prolongata. Tborax dorso antico late et obtuse bilobato. 



Long. 10 millim. S • 



Eab. Mexico (coll. Bates). 



In this species the furcate thoracic process in the fully-developed male is broad, and 

 the fork shows no tendency to divergence. In a very remarkable species from Ecuador* 

 this process, as well as the horn of the clypeus, reaches a degree of development far 

 greater than in 0. latebrosus. 



* Onthophagus mirabilis. 



Eufo-castaneus, fere calvus, femoribus flavo-testaceis ; tborace confertim punctato ; elytris confertissime punc- 

 tato-rugulosis ; pygidio reticulato-puuctato. rf . Clypeus breviter triangularis, antice cornu valde elongato, 

 verticali apice fisso, armatus ; tborax processo dorsali subborizontali angusto, valde elongato, supra sulcato, 

 apice divaricato-furcato et intra fuream cornu clypealem recipiente. 



Long. 11 millim. J . 



Eab. Ecuador, Kio Morona. 



