THE PsELAPHIDA OF NorTH AMERICA. 41 
third as long as the segment and separated by one-fourth of 
the width. Length 1.4 mm. ~ 
A. TESTACEUM, Casey. @ abdomen more pointed, head 
longer than in A. robustulum, elytral discal line one-half the 
length; abdominal basal carine one-third of the segmental 
length and separated by one-third of the width; otherwise like 
A. robustulum. Length 1.2 mm. 
Ruexipius, Casey. (Euplectus Lec.) 
Hlead very transverse, frontal margin crenate, prothorax 
with linear grooves, antenne straight, their insertion distant, 
posterior cox contiguous, tarsi with two unequal claws. 
Elytra with three abbreviated discal lines and a subhumeral 
fovea. 
R. GRANuLOsus, Casey. Depressed, of the color of new 
leather, pubescence thin, short, coarse, the body granulated 
over the entire surface with minute tubercles. Length 1 mm. 
Plate XI, Fig. roo. 
Head twice as wide as long; base slightly sinuate, occiput 
feebly impressed in the middle, tempora straight, convergent; 
eyes coarsely granulated, distant from the lateral margin of 
the vertex, frontal margin broadly arcuate and crenulated by 
fine longitudinal impressions; occipital foveze far apart, near 
the tempora, connected by a fine arcuate sulcus parallel to the 
frontal margin. Amtenne slightly shorter than the head and 
prothorax together, first and second joints cylindrical, as long 
as wide; second smaller, more rounded; third to eighth nar- 
rower, transverse; eighth twice as wide as long; ninth and 
tenth gradually larger, transverse, trapeziform; eleventh as 
-long as the five preceding together, scarcely wider than the 
tenth, conical from the middle of its length, base truncate. 
Prothorax widest in the middle, as wide as the head, sides 
nearly straight toward the base and the neck, arcuate in the 
middle; base arcuate, two-thirds as wide as the disk, and one- 
half wider than the neck; disk as wide as long, median sulcus 
