AMERICAN COLEOPTERA. 253 



rather large at the sides of the pronotum and on the elytra. Metasternum quite 

 numerously and moderately strongly punctate at middle, rather broadly impunc- 

 tate at sides. Eighth antennal joint quad rate-triangular, scarcely more than oue- 

 fourth longer than wide. Front tibise bisulcate, middle tibise not sulcate. Length 

 2-2.7 mm. 



Hub. — Texas (San Diego, Columbus, Beeville, Luling, Hockley, 

 San Antonio, Fedor) ; Indian Territory (Atoka, Vinita, South 

 McAlister) ; Illinois; Kentucky; Ohio; Kansas; Louisiana; Iowa; 

 Lower California (Santa Rosa). 



Under this name I have placed a large number of specimens from 

 a wide range of territory. There is considerable variation in the 

 development of the coarser punctuation and some are very feebly 

 gibbous in profile ; these latter approach so closely to the less 

 strongly gibbous form of vacuum that it is next to impossible to 

 separate them with certainty. Typical examples of the two species 

 are easily separable, the present species being scarcely at all gibbous 

 in profile, while vacuum is rather strongly so. For the rest it can 

 only be said that in coufusum the pubescence is a little longer and 

 denser, the punctuation somewhat finer and the impression along 

 the anterior marginal line of the metasternum externally is more 

 gradual and feebly defined, while in vacuum it is more abrupt and 

 in the form of an elongate fovea. The assumed polymorphism of 

 coufusum is probably not real, and I have little doubt that I have 

 confused several closely allied species, but they are not separable 

 by any constant characters that I can at present discover. 



The Lower California series is in it-elf complex and varies both 

 above and below the limits of size mentioned for the Texas speci 

 mens, which are to be considered the types. C. herbarum Gorh., 

 St. Vincent, W. I., is nearest coufusum, but the head and pronotum 

 are almost destitute of any trace of coarser punctures. These are 

 quite large and conspicuous in the elytra, with a distinct tendency 

 toward arrangement in lines. 



58. C angustum n. sp. — Dark brown, moderately densely pubescent; 

 form unusually elongate, not gibbous in profile. Coarser punctures few and small 

 on the head and prothorax, much more numerous and of medium size on the 

 elytra. Metasternum punctured from side to side, the punctures not much closer 

 at the middle. Front tibise bi striate, middle tibise without marginal groove. 

 Length 2.5 mm. 



Kansas, Hamilton County (Snow). 



One of the more conspicuously elongate forms; the metasternum 

 however, is of normal length. 



TRANS. AM. ENT. SOC. XXXI. JULY, 1905. 



