432 Memoirs on the Coleoptera 



angulate, the funicle simple, as usual in the forms here considered; 

 prothorax a fourth wider than long, the sides feebly converging and 

 only slightly arcuate to about apical third, where they become 

 gradually rounded to the very faintly constricted apex, which is 

 less than half as wide as the base; punctures rather coarsish, very 

 distinct, irregularly dense, the smooth median line distinct and 

 entire; elytra broadly and obtusely parabolic, with very moderately 

 prominent humeri, only very slightly wider than the large pro- 

 thorax and scarcely three-fifths longer; grooves moderately coarse, 

 deep, abrupt; intervals alternating slightly in width, with coarse 

 and dense but distinctly defined punctures, from less than twice to 

 two and one-half times as wide as the grooves. Length (c?") 4.3 

 mm.; width 1.9 mm. Pennsylvania (Conewago).. .pennianus n. sp. 

 Body much smaller, more narrowly elongate-oval, convex, deep black, 

 the squamules of the upper surface small, sparse and inconspicuous, 

 white, rather evident and disposed in large part in single lines on the 

 elytra; whitish scales of the under surface moderate in size and 

 rather evidently separated; beak in the male not very thick, dull 

 and sculptured, very feebly arcuate, gradually more so basally and 

 much longer than the head and prothorax, the antennse inserted 

 just behind three-fifths, the basal tooth of the club small, feeble and 

 obtuse; prothorax nearly a third wider than long, the sides con- 

 verging and moderately and very evenly arcuate from base to apex, 

 the latter truncate, not in the least constricted and fully half as 

 wide as the base; punctures moderate, very dense, the smooth 

 median line evident but irregular, not attaining the apex; elytra a 

 third longer than wide, slightly wider than the prothorax and three- 

 fourths longer, with moderately prominent humeri, obtusely rounded 

 in nearly apical third, the sides thence feebly diverging and scarcely 

 at all arcuate to the humeri; grooves moderate; intervals mutually 

 equal, rather coarsely but not densely, often uniserially, punctate, 

 and not quite twice as wide as the grooves. Length (cf ) 2.85 mm.; 

 width 1.23 mm. New York (locality unrecorded) parvus n. sp. 



It is highly probable that the pale ferruginous coloration in the 

 single type of iowensis may be due to immaturity, although there 

 are no other evidences of this condition ; the definition of the species 

 is, however, based upon other features, and especially the short 

 compact oblong outline and the very coarse pronotal punctures. 

 Defectus and alternans, though coming from the same region and 

 based upon unique types of different sexes, are, I think, amply 

 distinct as species, their entire habitus, sculpture and elytral 

 striation being strikingly different and in no way sexual, judging 

 at least by series of males and females of other species. The large 

 and densely squamose species of the coloradensis type, are evidently 

 allied more or less closely to the Mexican larvatus Boh.; the author 



