bo LAMELLICORNIA. 



is, however, sometimes diffused over nearly the entire surface, and is often brown 

 without brassy tinge. 



We figure an example from Los Remedios. 



5. OnthophagUS aCUminatUS. (Tab. V. figg. 3, tf ; 3 a, side view of head and 

 thorax.) 



Onthophagus acuminatus, Harold, Stett. ent. Zeit. 1880, p. 30 \ 



Hal. Panama, Bugaba, David, Colon 1 {Champion). — South America, Colombia 1 . 



Similar to 0. incensus, from which the male is readily distinguished by the carinated 

 forehead and pointed clypeus. It is also a much smaller insect. The female is with 

 difficulty to be distinguished from small and feebly-developed female examples of 

 0. incensus ; there is, however, generally perceptible a slight difference in the outline 

 of the clypeus — 0. incensus, 2 , showing a trace of sinuation in the reflexed apical 

 margin, which is quite absent in 0. acuminatus, 2 • 



An example from Bugaba is figured. 



6. Onthophagus nyctopus. 



0. hcematopo (Harold) affinis, ab 0. incenso et affinibus differfc thorace ( S ) lobo mediano-antico angusto, parum 

 producto, compresso ; sericeo-opacus, glaber, niger, capite thoraceque seneo-tinctis, hoc crebre baud profunde 

 punctate), linea dorsali late impressa ; elytris planatis, crenato-striatis, interstitiis planis, punctulatis ; pygidio 

 crebre punctate-; tarsis et antennis fulvo-piceis ; clypeo rotundato, medio (d 1 ) paullo reflexo, integro. 



c? . Vertex bicornutus nee carinatus, carina anteriore medio recta, ad latera angulata. Thorax antice medio 

 utrinque foveatus, lobo mediano angusto, vix producto compresso. Tibiae antice haud elongatae, apice intus 

 simplice. 



2 • Caput bicarinatum. Thorax medio prope marginem anticum obtusissime lobatus. 



Long. 5-6 millim. 



Hob. Panama, Bugaba, Volcan de Chiriqui (Champion). 



The outline of the gense is continuous with that of the clypeus. In the lower 

 development of the male the horns of the vertex are reduced to conical tubercles, and 

 the anterior prominence of the thorax is similar to that of the female. 



7. Onthophagus crinitus. 



Onthophagus crinitus, Harold, Ann. Soc. Ent. Fr. 1869, p. 510 \ 

 Hal. Mexico, Toxpam near Cordova (Salle x ). 



The following is doubtless a local variety of this species, the absence of hairs from 

 great part of the surface in the single example being probably due to artificial causes ; 

 in other respects it differs from the Mexican type-specimen of the male only in 

 colour : — 



Var. pananiensis. (Tab. V. figg. 4, e ; 4 a, side view of head and thorax.) 



Supra breviter setosus, nitidus, viridi-subcupreo-seneus, elytris nigro-violaceis ; thorace undique sat confertim 

 punctato, linea dorsali impressa ; elytris subtilissime crenulato-striatis, interstitiis aspere punctulatis. 



