172 LENG AND HAMILTON. 



red, tibife and tarsi black, coiidiles of hind femora dentiform ; thorax 

 oval, narrower in front, disc convex, surface with coarse transverse 

 punctures, median line smoother; elytra coarsely, irregularly punc- 

 tate ; apices acutely rounded, a small spine at the suture, a larger 

 spine externally. 



!§»teiio<«i>lioiiiis loiiguliis Casey, 1891, An. N. Y. Acad. Sci. vi, 34. 

 Length 10 inni. = .40 inch. Hnhituf. — Texas. 



This species, described from a single male, is stated to differ from 

 lepidus in having the pronotum in front of the coxie strongly de- 

 pressed and coarsely densely punctato-rugulose ; in lepidus this space 

 is divided by a polished longitudinal elevation, thus forming two 

 depressed areas. 



Xylotreclms gemellus Casey, 1893, An. N. Y. Acad. Sci. vii, 590. 

 Length 14-15 ram. = .54-.60 incli. Habitat. — Indiana. 



Described from two examples and represented as differing from 

 undulaUis chiefly by the coarser sculpture of the pronotum, suffused 

 pale pubescence extending across the base of the elytra and less 

 prominent frontal carina ; the transverse bands different in form, 

 being wider and posteriorly arcuate at the point where, in undalafK.^, 

 they are anteriorly angulate. 



The individuals of undulatus vary greatly in coai^seness or fineness 

 of sculpture, in })ubescence, and in distinctness of the elytral bands, 

 and none of the differences mentioned by Mr. Casey seem of any value, 

 unless it be the last mentioned. 



Cijrto])horus insinuans Casey, 1898, An. N. Y. Acad. Sci. vii, 590. 

 This is the male of Micvodytus gazellula. The description was made 

 from a unicpie taken in Ontario, Canada, with the statement that it 

 only dilfered from Microclyfus gazellula by having the third antennal 

 joint briefly dentato-spinose. 



The five males of that species before me all have rudimentay den- 

 tations at the apex of the third joint, and a little amplication of 

 this most probably exists in Mr. Casey's uni(iue. 



The antennal cliaracters of Mlcrochjtus in the " Classification" 

 belong to the^ female ; those of the male, then unknown, are the 

 same as in Cyrtophorus, exce})t in the less or non-develoi)ment of 

 the antennal spine. 



