614 Goleopterological Notices, VII. 



vertex. The front between the large inferior parts of the antennal cavities is 

 narrowed and tumid along the middle, descending and expanding to the 

 clypeal margin, which is broadly arcuate. The basal joint of the antennae is 

 as long as the next two combined, and the eyes are large, very prominent and 

 very coarsely faceted. The under surface of the head has three narrow but 

 very strongly elevated longitudinal carinse, one median and one immediately 

 beneath each eye. The legs are very slender, the femora thicker than the 

 tibiae but not dilated. This very minute bryaxid occurs from central Texas 

 to Yuma, in California, but is not common. 



Bythinini. 



BYTHINUS Leach. 

 The name Machserodes, proposed by Brendel for the few Ameri- 

 can representatives of this essentially European genus, cannot 

 hold good in the opinion of the vrriter, and the change of the name 

 bythinoides to tychoides, made by the author referred to in his re- 

 cent monograph, is not generally considered allowable by zoologi- 

 cal authors, such names as Bythinus bythinoides being considered 

 acceptable under the adopted rules of nomenclature, and there- 

 fore demanded by the rules of priority. The three species of 

 Bythinus in my cabinet inhabit the eastern parts of the United 

 States exclusively, and may be distinguished as follows : — 



Basal parts of the head strongly carinate along the median line. 



carinatus Bndl. 

 Basal parts not carinate; body much smaller. 

 Pubescence coarse, rather long and sparse (ij/c7«oi(Zes Bndl. ) 



1>ytliinoides Bndl. 

 Pubescence shorter, finer and about twice as dense carolinaB n. sp. 



In the first species the head of the male is tumid and carinate 

 along. the median line for some distance further toward tip than in 

 the female, and, between the anterior limit of the elevation and 

 the acutely angulate frontal margin, there is a perfectly smooth 

 and highly polished depression, containing a trapezium of four 

 elevated setigerous punctures. I have not noticed analogous 

 sexual differences in the second section of the table. 



B. carolinae. — Convex and rather strongly ventricose, polished, dark 

 rufo-testaceous in color, the head somewhat, and the abdomen quite notice- 

 ably, darker; legs, antennse and palpi still paler; pubescence quite abundant 

 and conspicuous, pale in color and strongly recurved. Head fully as wide as 

 long, much narrower than the prothorax, the eyes moderately small and sub- 

 basal ; surface throughout with large sparse and concave annular elevations with 

 minute granuliform pubiferous punctules scattered sparsely over the inter- 



