388 Memoirs on the Coleoptera 



a fourth (cf ) or a fifth (9 ) wider than the prothorax and fully twice as 

 long; striae moderately coarse, deep, the intervals rather more than three 

 times as wide as the striae, the punctures small, sparse and confused, the 

 squamules long, sparse and whitish, replaced by fulvous squamules in 

 two moderate and not well defined spots on each elytron; under surface 

 with the stout lineiform whitish squamules more or less dense. Length 

 (cf 9) 4-7-5-7 mm.; width 2.1-2.4 mm. Mexico (Puebla). 



Distinguishable from senilis by its smaller prothorax and sparser, 

 more whitish Hneiform squamules of the upper surface. The ante- 

 coxal spines of the male are shorter in the type, although otherwise 

 similar and the dark spots on the elytra are much less definite. 



Pachygeraeus n. gen. 

 The type of this proposed genus is a rather large, oblong-oval 

 species, named Centrinus IcBvirostris by LeConte. The beak is 

 relatively rather short and stout, at least in the male, the only 

 sex known to me, the antennae only moderately elongate, the club 

 rather broadly oval, with its first joint constituting about half the 

 mass, the mandibles small, coming together along a straight internal 

 line. The prothorax is relatively large, densely but not coarsely 

 punctured, the anterior coxse rather narrowly separated, the spine 

 before them in the male erect basally, flexed forward thence to the 

 tip, and, between them, there is a large and very deep perforate 

 fovea. The elytra are oblong, narrowing near the apex and the 

 legs are long, the third tarsal joint very broad and strongly bilobed. 

 The following species has been heretofore overlooked : 



Pachygeraeus sesopus n. sp. — Oblong-oval, convex, densely sculptured, 

 the vestiture of pale yellowish elongate-oval scales dense on intervals 

 1-5-9, ^i^d moderately dense on 3-7, also dense in a sublateral vitta on 

 the prothorax; under surface with more or less dense oval yellowish- 

 white scales; integuments rufo-ferruginous; beak in the male barely 

 longer than the head and prothorax with the antennae inserted at the 

 middle, smooth and minutely, sparsely punctured apically, coarsely 

 and densely at the sides basally; prothorax a third wider than long, the 

 sides strongly convergent and evenly arcuate from base to the apical 

 tubulation, which is two-fifths as wide as the base; punctures moderate, 

 very dense throughout and partially coalescent, without evident median 

 smoother line; scutellum small, subquadrate, the basal thoracic lobe 

 rounded, rather abrupt; elytral striae rather coarse and deep; intervals 

 densely and confusedly punctate, alternating in width, the narrower not 

 three times as wide as the striae; outline evenly elongate-oval, one-half 

 longer than wide, slightly wider than the prothorax and somewhat more 

 than twice as long; abdomen broadly, feebly impressed basally in the 



