THE PsELAPHIDZ OF NortrH AMERICA. i 
B. FEROX, Lec. Reddish brown, rather densely pubescent, 
punctulate. Length, 2.4 mm. Plate X., Fig. 78. 
Head transversely quadrate; posterior angles broadly arcu- 
ate, convergent; base elevated in an equilateral triangle 
limited by two anteriorly convergent carinez, and with a third 
carina in the middle; foveze small, in a line through the pos- 
terior third, laterally anterior to the elevated triangle; the 
vertex is declivous, anteriorly smooth, polished, the excavation 
limited by the nearly straight frontal margin. The sulcus 
originating in the occipital fovea 1s faint; the lateral margin 
is punctured; the frontal tubercles acute, dentiform, roofing 
the antennal cavity. The middle of the frontal margin is 
minutely carinate longitudinally. Eyes of the ¢ moderately 
large, not prominent, rounded. Awtenne half the length of 
the body; first joint cylindrical, emarginate above for the 
articulation of the second joint which is slightly narrower, 
oblong-obconical; joints three to nine gradually cylindrical, 
then quadrate, rounded, and slightly decreasing in width; 
tenth larger, globose in the 4, obconical in the 9; the last joint 
is as long as the two preceding, thicker, oblique, truncate, 
rounded at the base. Pa/fi dark brown, the last joint cylin- 
drico-fusiform, lighter at the tip which is bent inward, and as 
long as the first antennal joint. .Prothorax widest at the ante- 
rior third, where the width equals that of the head; sides 
strongly arcuate, somewhat sinuate behind the middle; base 
two-thirds of the greatest width; neck half as wide as the 
base. The length is slightly less than the width; the disk 
very convex; median sulcus fine, obsolete in the anterior 
fourth; lateral carinz spinous, basal foveze deep, nude, lateral 
ones irregular. The lateral sulci are slightly impressed, 
parallel to the sides, basal tubercles acute. /yira convex, 
one-sixth wider across the shoulders than the thorax; 
sides very divergent; the greatest width is across the tips, 
where it is nearly one-half greater than at the shoulders. 
The length of the suture in the female is_ slightly 
greater than the width at the shoulders; in the male it is still 
