AMERICAN COLEOPTERA. 33 



tinctly wider posteriorly; first discal costa evident, second indistinct, 

 each with more or less irregular or confused punctuation; all the 

 intercostal spaces with fine confused punctuation. Pygidium mod- 

 erately closely punctate; propygidial apical 'groove fine. Body beneath 

 finely sparsely punctate at middle, more closely but not coarsely 

 laterally. Upper tooth of front tibia submedian; ungual tooth sub- 

 apical, feebly or scarcely obliquely truncate, its apex about four times 

 as distant from the base as from the point of the claw (male), or 

 distinctly obliquely truncate, its apex barely three times as far from 

 the base as from the tip of the claw (female). Length 7.5-7.S mm.; 

 width 4.2-4.4 mm. 



New Braunfels, Texas. Four examples submitted by Mr. 

 Schaeffer,to whom it gives me pleasure to dedicate the species. 



In the male the tarsal claws are relatively longer and more 

 slender than in any other species known to me except ma- 

 cronycha. The eyes are also noticeably larger and the hind 

 thighs more slender in the male. The irregularity of punc- 

 tuation of the elytral costa? is a very exceptional character, 

 and is so marked on the second costa as to greatly obscure it. 

 This species does not look quite right in its present position, 

 but the mentum is as completely devoid of anterior declivity 

 and transverse ridge as in mentalis, and it should therefore be 

 tabulated here. 



17. D. mentalis n. sp. 



Moderately robust, very slightly wider posteriorly, head and thorax 

 polished, elytra minutely alutaceous but shining. Mentum large, 

 broadly convex, more or less flattened at middle, not declivous in 

 front, transverse ridge wanting, the accompanying setas nearly or 

 quite absent. Terminal joint of maxillary palpi very elongate cylin- 

 drical pointed, three to four times as long as wide. Front flattened 

 or vaguely impressed at middle behind the clypeal suture, the latter 

 distinct; punctuation rather sparse, the punctures distant by their 

 own diameters or more at middle, a little closer at sides; clypeus with 

 rather strong basal transverse ridge, punctures close, margin truncate 

 and feebly sinuate at middle, angles rounded. Prothorax very nearly 

 twice as wide as long, widest at or slightly behind the middle; sides 

 moderately arcuate, more convergent in front; angles obtuse, punc- 

 tuation rather fine and sparse, the punctures separated at middle by 

 two or three times their own diameters, a little closer at sides. Elytra 

 not quite three times as long as the prothorax, and barely one-fourth 

 longer than wide, slightly wider posteriorly; costae sharply defined by 

 the geminate stria?; intercostal spaces closely confusedly punctate, 



TRANS. AM. ENT. SOC. XXXV. (5) FEBRUARY, 1909. 



