202 



Face deflexed. Antenna; very short, not longer than the p/onotum, flattened, 

 eonsiderahly dilated, acuminate. Elytra green ; the middle field narrow, 

 pellucid, with fuscous dots at the base. Wings as in O. mexicana ; anterior 

 field partitioned by the longitudinal nerve, and densely reticulate. Antennae 

 and vittre on the lateral carinse running to the eye, fulvous. 

 Mexico altior (Saussure). 



O. bm-khar«ianiis, Sauss., Rev. et Mag. ZooL, XIII (1861), 314. 



Testaceous; head and pronotum with a fuscous fliscia on the upper por- 

 tion of the sides. Head flat above, scarcely convex, bi-carinate upon the sides; 

 rostrum rounded ; face slightly deflexed, not concave; intermediate caringe 

 sub-distant. Antennae elongate, flattened. Eyes pyriform, oblique. Pro- 

 notum compressed throughout ; discal area flat, tricarinate, acutely margin- 

 ate ; posterior extremity obtuse-angled. Elytra as long as the body ; upper 

 area flat, elongate ; apex obliquely truncate. Posterior femora passing the 

 abdomen considerably, compressed. 



Length of body, 1.08 inches ; elytra, 1.04 inches ; posterior femora, 0.74 

 inch. Male smaller. 



Mexico (Saussure). 



Subdivision 2. — Margin of the rostrum acute, emitting two lateral 

 branches, which run back to the ocellus, forming on each side a triangu- 

 lar faveola, in a manner situated below the lateral margin of the vertex. 

 Rostrum more or less excavated above. 



O. inexicamis, Sauss., Rev. et Mag. Zool., XIII (1861), 314. 



Rather small. Body much compressed, a pale fascia above. Head much 

 compressed, acute-trigonal ; vertex horizontal, elongate ; face much deflexed, 

 not arcuate. Vertex elongate, narrow, with a slightly-elevated convex carina; 

 rostrum in front trigonal-acute; carinate margins; margins acute; without 

 lateral foveolae ; * four facial carinse conspicuous, the median pair close 

 together, above the ocellus parallel, divergent below it. Pronotum with three 

 distant carinse, cut by the posterior sulcus l^ehind the middle; the lateral 

 carinne parallel on the anterior lobes, divergent and arcuate on the posterior, 



* It is diflQcult to understand this description of Saussure, when we remember it 

 is one of the species upon which the second subdivision, as given above, was founded. 

 But as I am unacquainted with the species, I give his description as I find it. 



