Rev. H. Clark on the Halticidee of South America. 379 
arrangement—and if so, of ‘course his nomenclature—should stand. 
The distinguishing characters that divide them are unimportant ; but 
they are characters, and characters, however feeble, if associated 
with well established names in the vast ocean of Phytophagisms, 
deserve to be perpetuated as assisting beacons. Thus AspHaira 
and AspiceLa seem to have almost every character in common: the 
form of the thorax is identical; the sides are rounded and broadly 
and shallowly margined, and the apical angles are produced, directed 
forwards, not laterally, and generally acute, the front of the thorax 
having generally a somewhat less breadth than the base. All the 
species of AspHara that I know come from Brazil; all of Aspicrna 
from Columbia or the regions adjoining. In AspiceLa, however, 
the claw is almost bifid, in AspHara it is either entirely unarmed 
or at most appendiculated ; geographically, however, Aspicena will 
represent the large Columbian forms of the more southern AsPHaRA. 
Lirosonycua has a thorax which is quite distinct; it is more rectan- 
gular, more quadrate, the sides are straight, not rounded, the mar- 
gination is narrow and sharply defined, not broadly splayed, and the 
anterior angles are less prominent and directed rather laterally than 
forward. 
The following diagnosis will point out the differing characters :— 
AspHara, AspiceLa, LitosonycHa. 
Caput verticale vel declive, breve, vix productum. Palpt mazillares art. 
penultimo robusto, ultimo brevi. Scutellum triangulare. Elytra ovata 
thorace ampliora, plerumque late marginata et levissime punctata, sed 
interdum in genere ASPICELA vehementer rugosa. Antenne filiformes, 
art. 80, 4°, et 5° subeequalibus. Thorax in 
AspHRaA transversus, angulis anticis prominentibus et porrectis, lateribus 
rotundatis et late marginatis ; 
ASPICELA idem ac Asphera ; 
Lirosonycua transversus, rectangularis, lateribus rectis et leviter mar- 
ginatis, angulis anticis brevibus. Pedes satis graciles, unguiculis in 
Aspumnra bifidis vel penitus bifidis, 
ASPICELA appendiculatis, 
Lirosonycua appendiculatis. 
Genus AsPHaRA, 
Of the many species which I have received as belonging to this 
genus I have been able to retain only two or three, the majority of 
reputed representatives being, in my opinion, examples of Ptena (or 
Omophoita); the passage in truth between the two genera (as 
