Baring 393 



smooth line indistinct and partial; elytra two-fifths longer than wide, at 

 the swollen humeri evidently wider than the prothorax, three-fourths 

 longer; striae not coarse; intervals broad, densely and confusedly punc- 

 tate; male with a very short erect conical process before each anterior 

 coxa. Length (cT) 3.8 mm.; width 1.75 mm. Kansas (Fort Scott). 

 One example. 



Comparable only with perscilla, but larger, more elongate and 

 with a larger, basally more arcuate beak and basally less parallel 

 prothorax; the dense and uniform vestiture of perscilla is whiter 

 and less yellowish. 



The species perscilla Gyll., is now represented in my collection 

 by six specimens from southern Illinois, Missouri, Kansas and 

 Minnesota; the following resembles it rather closely but is more 

 rhomboidal in outline, and has the scales of the upper surface 

 shorter and somewhat less dense: 



Centrinaspis aequalis n. sp. — Rhomboid-oval, moderately convex, deep 

 black throughout, including the legs and antennae; vestiture faintly 

 yellowish-white, linear and not very dense above, the scales more oval 

 and larger beneath, very dense but separated on the metasternum and 

 mes-epimera; beak in the female evenly arcuate, distinctly longer than 

 the head and prothorax, slender, gradually slightly thickened behind the 

 antennae, which are inserted at or barely beyond the middle, slender, the 

 club narrowly oval; prothorax two-fifths wider than long, the sides 

 evenly arcuate from base to the very feeble apical constriction, subparallel 

 basally; apex half as wide as the base; punctures moderate, dense, the 

 median line not smooth but faintly tumid; basal lobe short, broadly 

 rounded, a fourth the total width; elytra with distinctly oblique and 

 broadly arcuate sides and moderately obtuse rounded apex, at the very 

 moderate humeral prominences slightly though evidently wider than the 

 prothorax, about twice as long; striae narrow, the intervals broad, sub- 

 equal, at least four times as wide as the striae, with the squamules disposed 

 in about three lines on each. Length (9) 3-75 mm.; width 1.65 mm. 

 Colorado (Greeley), — Wickham. One example. 



Differs from perscilla, besides as above mentioned, in the re- 

 latively longer prothorax and shorter elytra, the former with more 

 evenly arcuate sides and the latter with more oblique and less 

 rounded sides ; the less dense scales of the parts of the under surface 

 mentioned in the description is a feature not at all traceable in 

 perscilla or proxima, the latter also having denser vestiture above 

 and a much larger prothorax, with the sides more rapidly rounding 

 anteriorly. 



Centrinus finitimus Csy., described as from Dallas, Texas, differs 



