Coleopterological Notices, IV. 609 



feebly impressed in the male, but always more or less narrowly 

 separates the cox£e, and the ante-coxal corneous processes of the 

 male, forming so characteristic a feature of Centrinus, are completely 

 obsolete. The scutellum, legs and abdomen are nearly as in Cen- 

 trinus, and the body is similarly squamose ; the mes-epimera are, 

 however, much less frequently visible from above in the reentrant 

 angle between the protliorax and elytra. 



Our species are not very numerous and may be recognized a.s 

 follows : — 



Prosternum flat or approximately so. 



Anterior coxfe separated by less than one-half of their own width; Leak 



moderately stout and snbequal throughout. 



Squamules of the pronotum abruptly and broadly dense and conspicuous 



at the sides, and sometimes, also, narrowly along the middle, the 



vestiture of the intervening regions consisting of small and more or 



less inconspicuous squamules. 



Punctures of the pronotum contiguous and more or less longitudinally 



coalescent ; scales of the elytra disposed in a single even series on 



each interval 1 liiieicollis 



Punctures of the pronotum rather widely separated ; elytral scales dis- 

 posed in one or more series on each interval, quite broadly confused 



on the third and still more broadly on the fifth 2 ingenuiis 



Squamules of the pronotum uniform in structure throughout and but 



slightly uneven iu distribution, usually larger and gradually a little 



denser toward the sides. 



Anterior coxse very approximate, sejiarated by about one-fourth of their 



own width or less. 



Protliorax about as long as wide, coarsely, rugosely but not very 



deeply sculptured ; body narrow 3 scitlllllS 



Prothorax distinctly wider than long, the body more broadly oval. 



4 decipieiis 

 Anterior cox?e smaller and separated by nearly one-half of their own 

 width ; very small species ; prosternum perfectly flat. 



5 effetus 



Anterior coxfe separated by distinctly more than one-half of their own 

 width ; beak longer, more slender and almost impunctate ; body shorter 



and broader, the second funicular joint much longer 6 contractus 



Prosternum with a narrow and deep but squamose longitudinal impression, 

 limited on each side by an obtusely prominent ridge ; beak very stout, 

 especially toward base in the male 7 caillis 



1 IVicentrus lineicollis Boh. — Sch. Cure, VIII, i, p. 221 (Cen- 

 trinus). 



Oblong-oval, narrow, subparallel, convex, black, rather dull ; 

 vestiture whitish, the slender scales of the upper surface distinct 



