70 PROCEEDINGS OF THE NATIONAL MUSEUM vol. in 



black to brownish black, antennal club grayish brown. Metasterniun 

 as coarsely punctured near midline as laterally; narrow band at mid- 

 line impunctate and faintly indented posteriorly. The metasternal 

 punctures medially larger and twice as numerous as in alluvius, and 

 slightly larger and more numerous than in monticola. Ventral seg- 

 ments of abdomen and legs not differing noticeably from those de- 

 scribed for the holotype of alluvius. 



Male minor. — Paratype, length 4.1 mm. ; width 2.6 mm. Differing 

 from the holotype male major in the following respects: Clypeus 

 shallowly reflexed anteriorly, less so laterally, somewhat more dis- 

 tinctly emarginate; clypeal disc and frons with more numerous, evenly 

 distributed, coarse, setigerous punctures; clypeal carina lacking; frontal 

 carina low but distinct, very slightly indented medially; gena scarcely 

 produced, edge arcuate. Pronotum less convex, pronotal protuber- 

 ance obsolete, indicated by a faint bulge in the median convexity of 

 the pronotum; punctures somewhat more distinctly margined and 

 more closely spaced. Elytra with rows of tubercles on elytra some- 

 what more irregular, the tubercles still more numerous than in alluvium 

 or monticolus. Ventral surfaces similar to type but shghtly more 

 heavily punctate on metasternum. Forelegs greatly shortened, the 

 forefemora barely extending to the lateral pronotal margin and the 

 foretibia proportionately shortened and somewhat thickened; both 

 apical conical projection and distinct pencil of hau"s lacking. 



Allotype. — Female, length 4.5 mm., width 2.7 mm. Differing 

 from the holotype male major in the following respects: Clypeus 

 shallowly reflexed anteriorly and laterally, somewhat angularly emar- 

 ginate anteriorly; clypeal disc closely, coarsely, rugosely, setigerously 

 punctate; clypeal carina distinct but only slightly, rather evenly ele- 

 vated above clypeal-frontal surface; frons behind carina with scattered 

 coarse and fuie punctures; frontal carina low but distinct, generally 

 of uniform height, not indented medially, rounded off laterally to 

 sm'face of vertex; gena scarcely flared, lateral edge arcuate. 



Pronotum less convex, pronotal protuberance vaguely indicated by 

 a rounded swelling; size and density of punctures similar to those of 

 the male minor. Elytral intervals with double row of tubercles very 

 irregular; number of tubercles noticeably fewer when compared to 

 either male major or minor. Pygidium and ventral smiaces similar 

 to male major except for shortened, stubby forelegs; the apex of fore- 

 femur barely reaching to the lateral pronotal margm; foretibia pro- 

 portionately shortened, apical projection and pencil of liau's lacking, 

 apical spine as long as the thi-ee basal tarsal segments. Last abdomi- 

 nal segment not emarginate at middle. 



Type. — Canadian National Collection 7528. 



