156 WILLIAM G. DIETZ, M.D. 



thorax, tapering to apex, punctured in rows, each puncture bearing a claviform, 

 erect scale, feebly striate, with intervening smooth, elevated lines; more shining 

 and less coarsely punctured in the female than in the male; basal tufts obsolete, 

 incision feeble; scrobes as in the preceding. Antennse rather slender, first joint 

 of funicle stout, second scarcely longer than the third. Head very finely aluta- 

 ceous, with a few scattered, very fine punctures. Prothorax a trifle wider than 

 long, very little narrowed in front, broadly rounded on the sides, apex scai'cely 

 constricted ; surface closely and rather coarsely punctured, punctures subcon- 

 fluent, each bearing a suberect whitish hair, very sparsely scaly, scales more 

 evident on the sides. Scutel distinct. Elytia two-fifths wider than the pro- 

 thorax, humeri very prominent, sides subparallel for one-half their leugtl;, 

 then rounded to the apex, rather coarsely striate, punctures small, remote; in- 

 terstices slightly rugose, setse erect, quite evident, scales similarly condensed as 

 in the preceding species. Prosternuni long in front of coxse, ridges distinct. 

 Legs rather stout, femora moderately clavate, tibiae widened towards the apex, 

 terminal hooks rather prominent: tarsi broad, stout, third joint broadly bilobed, 

 fourth joint projecting scarcely more than one-half the length of the third; 

 claws connate two-thirds their length. Length 2 mm. ; 0.08 inch. 



Hab. — District of Columbia, Maryland, Texas, Kansas, North 

 Carolina (Casey). 



Five specimens in Mr. Ulke's collection are before nie. Kindly 

 determined for me by Capt. Casey. Why that author should de- 

 scribe the beak as "feebly arcuate" and the elytra at base "three- 

 fifths wider than the prothorax" I cannot understand, as in all the 

 specimens before me the beak is strongly curved and the elytra less 

 than one-half wider at the base than the prothorax. 



Subgenus PSEUDROMICRONYX. 



Tarsal claws moderate sized (except perfidus), connate at their 

 basal third, very rarely to the middle, divergent; the beak in gen- 

 eral longer and more slender than in Smicronyx proper ; antenn?e 

 less stout with the second joint of funicle distinctly longer than the 

 third (except obtedus group) ; tarsi slender, with the fourth joint 

 elongate, much longer than the preceding. 



I have divided the species into two quite unequal sections based 

 on the formation of the articulating surfaces of the posterior tibise: 



Articulating surfaces of posterior tibife obliquely ascending and open externally. 

 Plate vii, fig. 20 Section I. 



.Articulating surfaces of posterior tibise terminal or oblique, and ascending pos- 

 teriorly. Plate vii, fig. 20a Section II. 



Section I. 

 Aside from the difference in the structure ujwn which I have based 

 this section, the species present nothing noteworthy diflerent from 

 those of the following section, except that in two of the species the 



