The Pselaphid^ of North America. 235 



one-third the width of the head, broad, divided by a fine line 

 which is prolonged backward and dilated into a broad shallow 

 sulcus reachinfj to a line drawn throu<jh the anterior margin 

 of the eyes. The posterior fovece are small and deep, placed 

 in semicircular impressions, open towards the eyes, and 

 leaving in the middle a narrow ridge which connects the 

 elevated occiput with the two ridges running alongside the 

 frontal sulcus to the frontal tubercles. The palpal joints are 

 very transverse, bottle-shaped, terminating in long setae. 

 A7itcnnce in female half as long as the body, in the male 

 longer, the first joint more than half the width of the frontal 

 margin, concave anteriorly. The second is as thick as the 

 first and half as long, third and fourth equal, longer than the 

 second but not thicker; fifth to tenth equal in width, decreas- 

 ing in length, tenth perceptibly longer than wide. Eleventh 

 very little thicker and as long as the four preceding joints. 

 In the female it is thicker and shorter. Prothorax barrel- 

 shaped, convex, evenly vaulted, same length as the head, as 

 wide as long, widest behind the middle, the median basal 

 fovea oblong, reaching one-third from the base and thickly 

 filled with pubescence; lateral fovere ample, pubescent, lateral 

 depression shallow-. Elytra one-third longer than the pro- 

 thorax, width across shoulders equal to the length, tips one- 

 fourth wider; humeri moderately prominent, discal lines 

 abbreviated near the tip. Abdomen along the posterior mar- 

 gin of the first segments wider than at base, broadly margined, 

 margins of the segments arcuate, equally convex, the two 

 basal segments nearly equal in length. Legs very long the 

 second tarsal joint longer than the third. 



Habitat. California. Arizona. (Wickham). 



Ct. piceus, Lee. Dark piceous, eU'tra, antennas, and legs 

 reddish brown, palpi paler. Length 1.9 mm. Plate VI., 

 Fig. 18. 



Head, including eyes, as wide as long, frontal tubercles, nar- 

 row posteriorly, not transverse, the dividing line scarcely 



