Tue PsELAPHIDZ OF NorTH AMERICA. © 224 
Clypeus swollen, convex, subangulate anteriorly. Antenne 
robust, one-half as long as the beetle, first joint about two- 
thirds as long as the frontal margin, cylindrico-conical; second 
smaller, of the same shape, two-thirds the length of the first, 
third and fourth equal, shorter than the second, and nearly as 
wide. Fifth and sixth, in the male, globose, wider than the 
fourth. Seventh, eighth, ninth and tenth, globose, the last two 
each equalling the third, which slightly exceeds the seventh, 
this being again exceeded by the eighth; eleventh subglobular 
a little wider than the tenth, and bluntly pointed. In the 
female these joints are subequal, subglobose, a little longer 
than wide, and becoming almost imperceptibly larger towards 
the tip. Palfi with the first joint very small, quadrate, second 
more than half as long as the head, small at base gradually 
increasing in width, sigmoid; third pedunculate, lamellate, 
fourth with the lamella opposite, and as long as, that of the 
third, the two-resembling the cotyledons of a bean. Pro- 
thorax campanulate length and width equal to that of the 
head including the eyes, sides evenly arcuate, becoming 
straight and parallel posteriorly, base a little less than twice 
as wide as the neck, with a fine impressed line around it; 
disk evenly vaulted, pubescence radiating from the center. 
£lytra across the shoulders one-half wider than the base of 
the prothorax; at the widest point which is just two-thirds of 
the length from the base they are just one-half wider than the 
breadth of the shoulders. Anterior half of the disk flat, tip 
and sides obliquely declivous, sutural lines nearly parallel, 
discal lines sulciform with flat bottoms, and evanescent near 
the middle of the elytral length. Shoulders prominent. 
Abdomen at base one-eighth narrower than the greatest 
width of the elytra, and as long as the width at the shoulders, 
very convex, broadly margined. First segment one-fourth as 
long as the basal width, sides divergent, a deep transverse 
impression near the middle of each half of the base. Ventral 
segments equal in length with no perceptible sexual differences. 
Legs long, slender, anterior femora with three spines. Tarsi 
