The Pselaphid/E of North America. 277 



being large and prominent. Sides anterior to the e3-es con- 

 vergent, slightly sinuate, supra-antennal tubercles quadrately 

 rounded, the front depressed in the middle, slightly arcuate, 

 as wide as the neck; frontal fovea small, interocular foveas 

 twice as distant from one another as from the eye, connected 

 with the frontal impression by an inconspicuous, interrupted 

 depression. Occiput convex. Antcnn(r. longer than the head 

 and prothorax, first and second joints cylindrical or barrel- 

 shaped, subequal, third and fourth smaller, subequal, fifth 

 larger than the fourth, sixth and seventh smaller, obconical; 

 eighth smallest, quadrate, ninth and tenth trapezoidal, rapidly 

 increasing in size. Base of eleventh as wide as the tenth, 

 middle twice as wide as the second; it is twice as long as 

 wide and acuminate at tip. Palfi rather long, the first joint 

 and the base of the second of a much darker brown than the 

 rest, the last joint fusiform, four times longer than wide. Pro- 

 thorax one and one-fifth times as long as the head is wide, 

 sides from the neck to the middle divergent, thence con- 

 vergent, slightly arcuate to near the base, where they are sin- 

 uate. Disk convex, with three small, equal, pubescent foveas 

 situated in slight depressions one-fourth from the base. Ely- 

 tra little wider than the prothorax across the low shoulders, 

 sutural length equal to this width ; across the tip they are one- 

 third wider. Sides divergent, slightly arcuate, the declivous 

 part narrower than usual, disk with a nearly plane area in the 

 neighborhood of the end of the suture and the shoulders. 

 Base bifoveate, the respective lines sharply defined, the sutural 

 ones parallel, the interval roof -shaped, discal lines parallel 

 near the base, convergent behind the middle and abbreviated 

 in the posterior fourth. Abdomen longer than the elytra, 

 border wide, slightly retuse, first segment twice as wide as 

 long, the .cariucC parallel, reaching the middle and including 

 one-third of the segmental width. Second and third dorsals 

 equal in length, not quite half as long as the first. Legs long, 

 the second and third tarsal joints subequal. 

 Williams, Arizona. H. F. Wickham. 



