The PsELAPHIDyE OF NoRTH AMERICA. 8l 



the third, fusiform, five times longer than wide, acuminate. 

 AntenncB^ excluding the last joint, as long as the head and pro- 

 thorax, first to eighth joints obconical, regularly decreasing in 

 size; ninth and tenth respectively as wide as the second and 

 first, sub-globose, nearly transverse; eleventh one-half thicker 

 than the tenth, more convex outside, as long as the three pre- 

 ceding. Prothorax widest across the anterior fourth, anterior 

 circumference semi-circular, sides straight from the anterior 

 third to the basal angle, rounded, not margined; disk evenly 

 vaulted, with a large, deep, median fovea, lateral fovece small 

 and shallow; on each side of the large fovea is an inconspicu- 

 ous tubercle, and there are two shallow impressions on each 

 side near the base; median basal carina present, median, 

 transverse, and lateral sulci wanting. Elytra rather convex, 

 with obsolete shoulders, as in some Calif ornian Batrisi, the 

 sutural lines close together, discal lines wanting; there are two 

 shallow impressions near the base. Abdomen wider than the 

 elytra, nearly as long as the prothorax and elytra, without a 

 visible line of junction between the dorsals and ventrals above, 

 not raarcrined; basal dorsal sec^ment three times wider than 

 long, basal fovece deep, the median twice as wide as the lateral 

 ones; second and third segments sub-equal, together as long 

 as the first; fourth half as long as the abdomen; fifth very 

 short, emarginate at the tip. Prosternum short, the coxal 

 cavities continuous, coxae large, conical: mesosternum cari- 

 nate, narrow anteriorly, bilobed, the posterior coxcC separated 

 by a distance equal to the length of the last palpal joint. 

 Legs, coxa^, and trochanters simple, not spinous, femora 

 strongly clavate, tibife moderately arcuate, the posterior ones 

 with a very small terminal spinule inside; tarsi half as long as 

 the tibicC, first joint short, second longest, more than half the 

 length of the tarsus, thicker at the distal end, third cylindrical, 

 thin, with but one perceptible claw. To all appearance the 

 unique specimen described is a male; the ventral segments 

 correspond to the dorsals in length, the fourth segment bears 

 a large, deep, transverse fovea, and the fifth is semi-circular. 



