558 Coleopterological Notices, V. 



ridge strong, becoming attenuated and outwardly curvate anteriorly in -the 

 direction of the apical angle, attaining apical fifth, perfectly straight and 

 feebly, outwardly oblique throughout posteriorly, attaining the base ; remain- 

 ing ridges only feebly traceable, on each side one tine and basal, near the 

 lateral ridge, another attaining neither base nor apex, and a third near the 

 middle in apical half. Elytra more distinctly rounded in basal third, behind 

 the base quite distinctly wider than the prothorax, more than twice as long, 

 nearly as long as wide, each with seven strong fine and even ridges, the inter- 

 spaces coarsely grooved, the grooves remotely, not strongly punctate and 

 enclosed each by two fine, less elevated carinje ; inflexed flanks coarsely, 

 strongly punctato-reticulate, with an abrupt deep and remotely punctate 

 groove near the lateral ridge, inferiorly arcuate near the base, not attaining 

 the latter, the carina fine only visible in basal fifth. Piopyi/idium not twice as 

 wide as long, strongly, rather closely but not very coarsely punctate, somewhat 

 strongly carinate ; pygidium very strongly inflexed, longer than wide, strongly, 

 rather closely and unevenly punctate, the punctures finer toward apex. Pro- 

 sternum wide, coarsely but sparsely punctate ; mesosternum broadly, strongly 

 cuspid at apex, fitting closely into the prosternum, very coarsely, somewhat 

 closely punctate. Legs long, slender ; tarsi notably elongate, the ungues 

 very long slender and feebly arcuate. Length 3.0 mm. ; width 2.2 mm. 



Colorado (Denver). 



Two specimens taken by Mr. Hugo Soltau, one of which he has 

 kindly placed in my cabinet. From leconlei this species differs 

 greatly in the broadly but strongly angulate sides of the protho- 

 rax, and in the wholly different form of the strong lateral ridges 

 of the pronotum. 



AIVAPLEUS Horn. 



The two species in ray cabinet may be readily known as fol- 

 lows : — 



Evenly oval, the elytral apex narrow, less than one-half of the maximum 

 width; prosternum between the coxae rather wider than long; punctures 

 throughout very coarse and strong niargiliatlis Lee. 



More oblong-oval ; elytral apex fully one-half of the maximum width ; pro- 

 sternum narrower between the coxae, about as long as wide ; punctuation 

 less coarse and more superficial COinpactuS n. sp. 



These two species can be readily discriminated by certain pecu- 

 liarities of facies, which are difficult to describe exactly. 



A. conipactlis. — Oblong-subrotund, rufo-testaceous throughout, moder- 

 ately shining, rather coarst'ly, densely punctate. Head concave between the 

 antennae, the point of insertion of the latter visible anteriorly. Prothorax 

 about two and one-half times as wide as long, the apex one-half as wide as 



