North American RJiyncliophora. 247 



AinJIVElSIA Horn. 



• 



The species of this genus are rather numerous, and inhabit the 

 regions between the Rocky Mountains and the Pacific Ocean. 

 Of the six species before me, but three appear to have been pre- 

 viously described. These six species are easily divided into three 

 distinct groups as follows : — 



Terminal spur of posterior tibiae long, stout, and prominent; body oval, 

 rather robust, at least in the female. 



I. Outer joints of funicle longer than wide ; elytral pubescence very 



short, sparse, and inconspicuous g^raiiicolli§ 



II. Outer joints of funicle small, robust, moniliform, not longer than 



wide ; pubescence of elytra long and conspicuous. 



Pronotum in the middle finely and densely granulose, not at all 

 squamose S^raiiulata 



Pronotum coarsely and very unevenly granulose, the granules bear- 

 ing a few small, broadly oval scales, adherent to their upper sur- 

 faces by reason of a varnish-like coating rauca 



Pronotum covered rather sparsely with scales which are free, or 

 very nearly so, not cov^ered with a varnish-like exudation. 

 Pronotal scales short, oval, finely and strongly strigose. sordida 

 Pronotal scales very long and slender, more conspicuous, not per- 

 ceptibly strigose tesselata 



III. Terminal spur of posterior tibiae very small, nearly obsolete ; 



body narrow and elongate ; outer joints of funicle much longer 



than wide. 

 Antennal scape very long and slender, slightly passing the posterior 

 margin of the eye ; el3''tral pubescence very short and inconspicu- 

 ous ; anterior tibiae very strongly denticulate within throughout 

 the length sculptili§ 



In all of these species the first ventral suture is more or less 

 distinctly arcuate in the middle, sometimes rather broadly, and 

 occasionally very narrowly so. The second segment varies in 

 length, being generally slightly longer than the third and fourth 

 combined, especially in group II., but sometimes slightly shorter 

 than the latter, as seen in groups I. and III. In both these 

 latter groups the elytral intervals are alternately more convex, 

 very conspicuously so near the apical declivity, while in group 

 II. the surface is generally even, or with the alternate intervals, 

 in very exceptional cases, very slightly more prominent. The 

 ocular lobe also varies conspicuously in prominence. Through 

 sculptilis the genus, as here considered, seems to approach very 

 near to Dyslobus Lee, and as it is seen to be rather hetero- 



