124 DESCRIPTIONS OP NEW SPECIES. 



The species of Uloma in my collection are easily distinguished 

 by the following characters : 



A. Middle plate of mentuxn oval, not transverse, lateral lobes distinct, 



inflexed. IMPRESSA. 



B. Middle plate of tnentum transverse, oval, or subcordiform, smooth and 



concave in tlie male, strongly punctured in the female, lateral lobes 

 not visible ; 

 Striae of elytra deep, strongly punctured ; 



Thorax narrowed from the base. IMBERBIS. 



Sides of thorax parallel behind the middle ; 



Elytral intervals sparsely punctulate. CAVA. 



Elytral intervals densely punctulate. PUNCTPLATA. 



Striae of elytra not deep, intervals flat, punctulate. LONOULA. 



400. U. cava. Elongata, piceo-ferruginea, nitida, capite antice lunatim 

 impresso, inter oculos profunde transverskn impresso, occipite breviter 

 canaliculate, thorace subtilius punctato latitudine paulo breviore, ante 

 medium angustato, lateribus fortiter marginatis, antice magis rotundatis 

 postice fere parallelis ; elytris striis profundis punctatis, interstitiis 

 paulo convexis parce punctulatis ; tibiis anticis 6-7 denticulatis ; mento 

 (maris) transverse, ovali, la?vi, medio concavo. Long. '28. 



One specimen, from Louisiana. Of the same general form as 

 the preceding, but easily distinguished by the smaller size, and 

 by the characters given above. Several small impressed foveas 

 are visible on the thorax, but believing them to be accidental, I 

 have not mentioned them in the diagnosis. 



401. U. punctlllata. Valde elongata, piceo-ferruginea, nitida, 

 capite antice lunatim impresso, inter oculos breviter transversim im- 

 presso, thorace subtilius punctato, latitudine paulo breviore, lateribus 

 marginatis, antice paulo rotundatis postice rectis parallelis ; elytris 

 striis profundis punctatis, interstitiis parum convexis sat dense punctu- 

 latis ; tibiia anticis 5-6 dentatis ; mento transverse, ovali, (maris paulo 

 concavo, Isevi, feminae fortiter punctato). Long. -30 -33. 



Middle and Southern States. The thorax of the male is rather 

 broader than that of the female, and is very obsoletely impressed 

 near the tip in one specimen, and more rounded on the sides near 

 the anterior angles. This species differs from all the others by 

 the somewhat narrower form, by the side margin of the thorax 

 being a little narrower, but especially by the elytra being more 

 strongly and densely punctulate. 



