122 GEO. H. HORN, M. D. 



tate, smoother near the apex, sutural costa feeble, diseal eosta obsolete. Pygidium 

 very sparsely and vaguely punctate. Prothorax beneath coarsely and sparsely 

 punctate. Metasternura coarsely sparsely punctate at middle and sides. Abdo- 

 men nearly smooth at middle, vaguely punctate at the sides. Length .48 inch; 

 12 mm. 



In this species the third and fourth joints of the antennae are e(|ual 

 and moderately long. The tip of the prosternum is broadly emarginate. 

 The two portions of the cleft claws are nearly equal. 



This species is less elongate than pallidus ; has the head much less 

 rugulose, and the thorax a little more irregularly punctured. 



One specimen 9 > Texas. 



P. debilis n. sp. — Oblong, rather slender, pale yellowish testaceous. Head 

 coarsely not closely punctate, clypeus feebly emarginate; eyes rather large and 

 prominent. Thorax a little more than twice as wide as. long, narrower in front, 

 sides moderately arcuate, margin entire, base without marginal line, disc moder- 

 ately convex, coarsely, rather sparsely, equally punctate. Elytra very little wider 

 than the thorax, coarsely sparsely punctate, a little smoother at apex, sutural 

 costjE feeble, oblique disciil and submarginal costse obsolete. Pygidium obsoletely 

 coarsely and very sparsely punctate. Prothorax sparsely punctate beneath, the 

 apex of prosternum deeply emarginate. the angles prolonged. Metasternura 

 nearly smooth at middle, coarsely sparsely punctate at the sides. Abdomen very 

 sparsely punctate at the sides. Length .42 inch ; 10.5 mm. 



Male. — Antennal club longer than the funicle. Posterior tibial spurs free, the 

 inner a little shorter. Penultimate ventral segment with a small slightly 

 roughened space near the posterior margin. 



The two divisions of the cleft claw are equal. This species resem- 

 bles the preceding, but is more slender and with a more sparsely punctate 

 head. In general appearance it resembles Lacli. inana. 



Occurs in Arizona, near Tucson. 



In a general review of the preceding species two may be said to have 

 a relatively small head : robusfus and vexatiis, while the others have a 

 large head. The two Mexican species in the table have a small head, 

 both have the posterior tibial spurs free in the male, one (Isevigatns) has 

 a long antennal club, the other { puhiaAlis) a short club. 



P. georgianus n. sp. — Form slender, moderately elongate, testaceous, head 

 pieeous. Head coarsely, deeply and closely punctate ; clypeus short, margin re- 

 flexed, feebly emarginate ; eyes large and prominent. Thorax short, more than 

 twice as wide as long, widest at middle, apex very little narrower than the base, 

 basal marginal line not present, disc with coarse and deep, rather sparsely but 

 regularly placed punctures. Elytra not wider at base than the thorax, sides very 

 little arcuate, oblique costal obsolete, submarginal costa feeble, surface coarsely not 

 closely punctate. Pygidium coarsely spa:sely punctate. Prothorax beneath 

 coarsely sparsely punctate, the post-coxal process very deeply emarginate, the 

 angles prolonged. Sides of raetasternum and abdomen sparsely punctate. Length 

 .50 inch; 12.5 mm. 



