148 Psyche [October 



spines on the upper edge, which is rather unusual in this genus and 

 apparently overlooked by every author dealing with this species. 



Tenebroides bipustulata var. impressifrons Reit. 



Reit. Verb. Nat. Ver. Brunn, XIII, p. 66. 



Lev. Bull. Soc. Ent. Fr. 1889, p. VII. 



Sharp, Biol. Cent. Am. Col. II, pt. 1, p. 422. One specimen, Rio Madeira. 



Differs from hipustulata only in the absence of the red elytral 

 spots. 



Tenebroides subcostata sp. nov. 



Elongate, feebly convex, color of upper surface brown, under side, antennae 

 and legs castaneous. Head moderately coarsely, not densely punctuate, a narrow 

 space near clypeus almost smooth, with at most only a few very fine punctures. 

 Antennal club abrupt and relatively large, sensitive space of joints large, occupying 

 about half the width of the joint. Prothorax transverse, lateral margin crenulate, 

 scarcely rounded at sides and feebly obliquely narrowing to base at about basal 

 third; hind angles obtuse; anterior margin rather deeply emarginate, anterior angles 

 prominent; basal marginal line almost entire, only narrowly interrupted at middle, 

 surface rather coarsely and densely punctate at sides, less densely at middle. 

 Scutellum small, smooth, shining. Elytra almost parallel, striae replaced by very 

 narrow, smooth and more or less distinctly elevated lines; intervals wide and very 

 densely irregularly punctate. Underside of head smooth, shining with a few sparse 

 punctures. Prothorax below densely and rather coarselj'^ punctate. Abdominal 

 segments irregularly transversely impressed and rather coarsely punctate. Length 

 7 mm. 



Madeira-Mamore R.. R. Co. Camp 39. One specimen. 



Judging from the descriptions this species seems to be related to 

 anceps Lev. and lineolata Reit. Both have also the elytral striae 

 replaced by narrow elevated lines but have the intervals distinctly 

 uni- or biseriately punctured, while the intervals in subcostata 

 are very densely, confusedly punctate. 



Tenebroides vittata sp. nov. 



Form short, feebly convex. Color above subseneous, shining, anterior mar- 

 gin of head, lateral margin of prothorax, an almost entire vitta on each elytron, 

 occupying the fifth and sixth intervals and lateral margin narrowly red. lender- 

 side, antennae and legs reddish. Head rather sparsely and finely punctate. Pro- 

 thorax about twice as wide as long; sides arcuate but feebly narrowing towards 

 base and not sinuate before basal angles; base scarcely narrower than the thorax 

 at apical angles; basal margin almost straight with the angles rectangular, basal 

 line entire; apical margin moderately deeply emarginate, angles acute, surface 



