378 Rey. H, Clark on the Halticidee of South America. 
Rnopatoroma. Form depressed; antenne filiform; anterior tibize 
incurved. 
Lacrica. Short, subovate; thorax subrectangular, base transversely 
foveolate ; antennz, 3rd joint scarcely longer than the second. 
Tenosis. Elongate; antenne filiform ; post. femora with inner me- 
dial angle. 
C#ports. Parallel; thorax transverse and foveolated at the base. 
Allied to Cacoscelis. 
Pretonta. Oval; thorax rectilateral, with the anterior angles some- 
what rounded; elytra thickly punctate; antenne filiform, joints 
4—6 subequal. 
Disonycua. Parallel; thorax transverse and nearly as broad as 
elytra, sides depressed ; antenne with joints 4~-7 subequal; un- 
guiculi simple. 
Sysrena. Parallel; thorax acute-angled and quadrate, not so broad 
as elytra; elytra punctate (rarely punctate-striate) ; antenne 
with joints 4 and 5 subequal, 3 being shorter; unguiculi appen- 
diculated. ; 
Cacoscenis. Parallel; thorax narrower than elytra, sides not de- 
pressed ; unguiculi appendiculated. 
Caxoscetis. Short, robust ; antennee filiform; post. legs very elon- 
gate. 
Norozona. Subparallel; thorax broad; elytra punctate-striate. 
AspwrRA, Dej., Asptcena, Dej., and Lirosonycua, Dej. 
These genera have one character in common, which separates 
them from the several forms which | have—whether rightly or not 
—-united under the genera CEpronycuis, Prena, &e. (Journ. Entom. 
vol. 11. p. 165 et seg.). These latter have all of them either a globular 
inflation above the posterior claw, or at all events the claw is (at the 
base of the two apical teeth or joints) considerably thickened. In 
these three genera before us the claw is more or less simple, while in 
all other respects, form, coloration, and size, the species composing 
them perfectly assimilate CEpronycnis. The number of species 
which possess this simple claw is, compared with that of the former 
group, wonderfully small; of the inflated-claw group I have regis- 
tered in the ‘Journal of Entomology’ 449 species, and subsequent 
additions to my collection will add at least fifty to that number; of 
these three remaining simple-clawed genera the exponents cannot 
number above thirty species. Now, with reference to the grouping of 
this small residuum, that is, these three genera, AsPH#RA, ASPICELA, 
and Lrrosonycna, I think that it will be convenient that Dejean’s 
