Sept.-Dec, I9i8.] SCHAEFFER : OsTOMID/E. 199 



Tenebroides semicylindricus Horn. 

 Tenebroides subccnca Reit. 

 Tenebroides helophorus Sharp. 



Of the correctness of the proposed synonymy I have scarcely a 

 doubt. Dr. Sharp's good description of the Mexican T. helophorus 

 agrees with our insect perfectly and Reitter's description of T. suh- 

 cenea, as far as it goes, does not fit any other North American species 

 except semicylindricus. 



Tenebroides floridanus new species. 



Elongate, moderately depressed ; color piceous ; prothorax dull with feeble 

 aeneous tint ; elytra shining and more distinctly aeneous. Head moderately 

 closely punctate, punctures hot very large; eighth antennal joint oval. Pro- 

 thorax transverse ; apical angles moderately produced ; lateral margin arcuate, 

 feebly convergent behind, not sinuate before the basal angles; basal angles 

 small, obtuse and subacute ; basal marginal bead entire ; surface moderately 

 coarsely punctate at sides, punctures smaller at middle. Elytra slightly 

 dilated below middle ; punctures of the regular rows rather fine but moder- 

 ately coarse near base. Prosternum rather finely punctate in front more 

 coarsely punctate posteriorly and at sides. Metasternum finely punctate at 

 middle, moderately coarsely and sparsely at sides. Ventral segments of ab- 

 domen moderately closely punctate, punctures finer posteriorly. First ventral 

 segment of the male moderately densely and finely punctate and with a few 

 larger punctures intermixed ; second and following segments as in the female 

 Length 5-6 nun. 



Florida. Key West, U. S. Nat. Mus. type. 



This species resembles in form T. americanus ssp. laticoUis but 

 has a slightly longer prothorax, the basal marginal bead is generally 

 entire and the male has only the first ventral segment densely punc- 

 tured. 



Tenebroides marginatus Pal. Beauv. 

 Tragosita cucujiformis Horn. 



Palisot de Beauvois' species can not be identified with certainty 

 from his poor descriptions and figures. However, one of his species, 

 marginatus, is recognized in our list and if correctly so Dr. Horn's 

 cucujiformis is a synonym of this species. The latter species was 

 described from an immature specimen. The form of prothorax as 

 well as the punctuation of the upper surface is very variable in this 

 as well as in the other species of this genus. 



