schaeffer: donaciini of the new world. 119 
In siibtilis and allies the sculpture of the elytral intervals is generally 
much finer and denser at apex, in rufa it is coarser. 
DoNACiA PUBicoLLis Suflfrian. 
Plate V, fig. II. 
' Rather narrow, elongate, depressed; color aeneous or cupreous, 
last ventral segment and the penultimate occasionally partly reddish; 
antennae reddish, joints two to five or six largely black above or all the 
joints more or less dark or annulated; legs pale reddish. 
Head moderately narrowed and constricted behind the eyes, which 
are relatively very large and prominent; posterior tubercles absent; 
surface densely punctate; antennae extending far beyond the middle of 
elytra in the male, to about the middle in the female, third joint much 
longer than the second and about equal in length to the first joint in the 
female but slightly longer in the male. 
Prothorax about as wide at apex as long; at base narrower than 
at apex; sides more or less distinctly arcuate below the lateral tubercle; 
anterior angles thickened, more or less oblique, posterior angles distinct, 
prominent; lateral tubercle more or less distinct, flattened, separated 
from the disk by an arcuate impression; anterior and posterior im- 
pressions feeble or absent; median impressed line fine, entire from apex 
to base; surface densely and moderately finely punctate and sparsely 
pubescent with very short, cinereous hairs. 
Elytra very elongate, longer than twice the basal width but not 
quite three times as long as wide at base; apices rounded; impressions 
absent; serial punctures rather coarse, scarcely finer towards apex; 
intervals with more or less distinct coarse rugae extending from interval 
to interval, at apex the sculpture is somewhat coarsely and densely 
rugose. 
Body below densely and finely punctate and very densely and 
finely pubescent with short, white hairs obscuring entirely the surface 
color; side pieces of prosternum entirely but sparsely pubescent with 
longer hairs; posterior femora unarmed below in both sexes, extending 
to or beyond apex of third ventral segment; tarsal joints rather elongate; 
intercoxal process of mesosternum narrow and distinctly narrower than 
half the width of the cavities. Length: 8-10 mm. 
Male: Last dorsal segment truncate at apex; last ventral segment 
feebly depressed at middle of apex. 
Female: Last dorsal segment truncate at apex; last ventral segment 
rounded at apex. 
