354 Memoirs on the Coleoptera 



Madarellus Csy. 



The description of Rhynchcenus undulatus Say, states that it is a 

 fifth of an inch, or 5 mm,, in length. I have no specimen quite so 

 large as this, but four, from Indiana and Missouri, approach it very 

 closely in that respect and display very little sexual difference, 

 the beak in the male being long, though not quite so long as in the 

 female, and distinctly, closely punctured to the tip, while in the 

 female it is a little more tapering and is subimpunctate distally. 

 Another series from Massachusetts to Iowa, consisting of five 

 females and two males, seems to represent a different though closely 

 allied species, much smaller in size and narrower in outhne; in 

 these the male is not so inflated anteriorly as the female and the 

 beak is much shorter than in the latter sex, although almost simi- 

 larly punctate and apically smooth. There can be but little doubt 

 that we have here two distinct species, both of which are inconstant 

 in coloration, being either entirely black or bicolored, and we also 

 have another of the undulatus group, differing markedly in sculpture; 

 it is from the southern tip of Florida. 



Madarellus inconstans n. sp. — Resembles undulatus, but much smaller 

 and less stout, black throughout or with rufous prothorax, polished, 

 feebly sculptured as in undulatus, but with the smooth elytral striae some- 

 what finer; beak (cf) not distinctly longer than the prothorax, or (9) 

 as long as the head and prothorax, the latter one-half wider than long, 

 the broadly arcuate sides rounding broadly and strongly to the sub- 

 tubulate apex; punctures small and sparse, wanting medially and toward 

 base, the basal margin with a series of small punctures, the lobe abrupt 

 and strongly rounded; scutellum small, subogival and moderately trans- 

 verse; elytra subacutely ovoidal, equal in width to the prothorax and 

 almost three-fourths longer, the surface as in undulatus, the interstitial 

 punctures only visible laterally, very small, feeble and sparse; pygidium 

 closely and strongly punctate, a little larger in the male; under surface 

 opaque, strongly and closely punctate. Length (cf 9 ) 2.65-3.5 nini.; 

 width 1. 2-1. 6 mm. Massachusetts (Framingham), — Frost, District of 

 Columbia, New York, Indiana and Iowa (Keokuk). 



Smaller than undulatus and not so broad or anteriorly inflated; 

 the four specimens of undulatus in my collection measure 4.2-4.7 

 by 1.75-2.0 mm. 



Madarellus floridanus n. sp. — Stout, oblong-subcuneiform, and rather 

 convex, shining, black, the prothorax rufous; under surface rufo-piceous, 

 the legs and beak deep black; beak in the female arcuate, closely and 

 coarsely sculptured basally and rather longer than the head and pro- 



