LAMELLICOENIA. 391 



Hah. Mexico, Omilteme in Guerrero 8000 feet (H. H. Smith). 



This singular species is an extreme form of the 0. chevrolati group. With legs 

 extended it resembles in general form and proportions the genus JEucranium of the 

 La Plata region. 



ONITICELLUS (p. 82). 



Oniticellus monstrosus (p. 83). 



I learn from Mr. Flohr that this eccentric species occurs, so far as he is aware, only 

 in ants' nests. 



2. Oniticellus rhinocerulus. (Tab. XXIV. figg. 9, 9 a, <s ; 10, 10 a, s , var.) 



O. calif omico (Horn) affinis ; differt <$ majore, genis angulatim dilatatis cornuque clypei versus apicem gradatim 



dilatato. Oblongus, dorso subplanatus, obscure senescenti-niger, opacus ; capite lsevi ; thorace sparsim sat 



grosse puuctato ; elytris striis haud impressis, nitidis, distanter punctulatis interstitiisque sparsim setifero- 



punctulatis ; corpore subtus polito fere lasvi. 

 S major. Clypeus apice cornu mediocre versus apicem gradatim dilatatus apiceque siuuato ; vertex cornu parvo 



acuto ; genis dilatatis acute angulatis. Tborax dorso postice planato, antice prof unde triangulariter retuso 



et obtuse bicornuto. 

 $ minor. Clypeus cornu apicali brevissimo versus apicem angustato ; vertex tuberculo conico parvo ; genis 



multo miuus dilatatis, angulatis. Tborax dorso fere integro, juxta marginem anticum tantum obsolete 



retuso. 

 § . Clypeus apice inerme ; vertex tuberculo parvo ; thorax omnino inermis. 

 Long. 9-12 millim. 



Hah. Mexico, Canelas in Durango (Becker), Omilteme in Guerrero 8000 feet (H. H. 

 Smith). 



We figure a fully-developed male and a male minor. 



APHODIUS (p. 83). 



Aphodius sallsei (p. 84). 



To the localities given, add : — Mexico, Mescala in Guerrero (H. H. Smith), Temax 

 in North Yucatan (Gaumer). 



Aphodius indutilis (p. 84). 



To the localities given, add : — Mexico, Amula in Guerrero (H. H. Smith). 



13. Aphodius cruentatus. 



Aphodius cruentatus, Lee. U.S. Geol. Surv. Hayden, p. 456; Horn, Trans. Am. Ent. Soc. xiv. p. 52 



(1887). 

 Aphodius, sp. no. 13, antea p. 86. 



To the locality given, add : — Noeth America, New Mexico, Arizona. 

 According to Dr. Horn, our insect from Sonora is A. cruentatus, Lee. 



