180 NORTH AMERICAN 



increasing rapidly in length, eleventh almost as long as the ninth and tenth 

 together ; maxillary palpi rather long and slender, translucent, pale testa- 

 ceous throughout, reddish toward the tip, more rlavate toward the base, third 

 joint much shorter than the first two together. Prothorax widest at the 

 middle, where it is distinctly narrower than long ; sides thence rather feebly 

 convergent and slightly arcuate anteriorly, slightly more strongly convergent 

 posteriorly and nearly straight ; anterior margin slightly longer than the 

 posterior, both nearly straight ; surface nearly evenly convex, very closely, 

 rather coarsely and somewhat irregularly punctate ; punctures irregularly 

 polygonal, very closely crowded at some points. Elytra at base about as 

 wide as the head ; sides feebly divergent posteriorly, very slightly longer 

 than the width at base, very feebly arcuate, nearly straight toward the 

 humeri ; together very broadly, roundly, and rather strongly emarginate 

 behind ; suture one-fifth longer than the pronotum ; surface broadly and very 

 feebly impressed on the suture at the base, elsewhere evenly convex ; punc- 

 tures evenly distributed, nearly round, deep, distant by slightly more than 

 one-half their widths ; interspaces rather strongly convex, polished, very 

 feebly reticulated. Abdominal segments decreasing uniformly and rapidly 

 in width, cylindrical, first just perceptibly narrower than the contiguous 

 elytra ; first very narrowly margined, remainder not margined ; surface 

 deeply, closely, evenly punctate ; punctures round, smaller than those of 

 elytra, distant by less than their own widths. Legs short, black, tarsi 

 pale iiavate ; first joint of the posterior elongated, as long as the next two 

 together, slightly longer than the fifth ; second nearly twice as long as the 

 third; fourth joints moderately bilobed, third moderately emarginate at tip. 



Male. — Unknown. 



Female. — Sixth ventral segment very obtuse behind, very broadly angulate 

 at the middle, angle not rounded, sides nearly straight. 



Length 3.8-4.5 mm. 



Veta Pass, Colorado, 2. 



Very readily distinguished from any other in this vicinity by the 

 peculiar structure of the tarsi. 



The tarsal claws are nearly simple and very slender, as may be 

 seen in the figure. 



25. A. papagonis n. sp. — Form robust, somewhat depressed. Pubes- 

 cence rather short, evenly distributed, somewhat dense, and but moderately 

 conspicuous, cinereous. Head rather large, twice as wide as long : labrum 

 moderate ; eyes prominent ; interociilar surface slightly more than twice as 

 wide as the eye, slightly convex ; sulcations very feeble ; intermediate sur- 

 face more than twice as wide as the lateral portions, broadly and rather 

 strongly convex ; punctures round, rather small, very deep, evenly distri- 

 buted, distant by less than one-half their widths ; ocular lines rather con- 

 vergent, meeting at less than two lengths in advance ; antennae moderately 

 robust, scarcely longer than the width of head, basal joint black, remainder 

 pale yellowish-testaceous, club scarcely darker, not very prominent; third 

 joint two-thirds longer than the fourth, not as long as the next two together, 



