4 EKOTYLIM. 



1. Trapezidera aenea. (Tab. I. fig. 3.) 



Trapezidera eenea, Crotch, Cist. Ent. i. p. 393 \ 

 Languria ahena, Sturm, in litt. 



Hab. Mexico 1 , Guanajuato, Parada, Toxpam, San Andres Tuxtla (Salle), Zapotlan, 

 Colima, Cordova, Morelia in Michoacan (Hbge) ; Guatemala, Calderas, San Juan in 

 Vera Paz (Champion) ; Nicaragua, Chontales (Janson) ; Costa Rica, Cache (Bogers) ; 

 Panama, Volcan de Chiriqui (Champion). 



This species (which I use for the type of the genus in default of knowing T. angusti- 

 collis) has the head strongly and closely punctured ; the orbit of the eye forming a 

 ridge, the ridge prolonged round the base of the antenna? in front, and divaricating a 

 little from the eye behind, but not continued further back than the eye itself. The 

 thorax is not very convex, rather depressed behind, a little angularly prominent in the 

 middle of its base, the base margined ; the basal striolae only indicated by a puncture 

 on each side ; its disc closely and rather distinctly punctate. The elytra have the striae 

 fine and very thickly punctured ; with numerous punctures, of about equal size, in the 

 interstices, so that the punctures appear confused with the stria? ; they are twice as 

 wide at the base as at the apex. The body beneath and the greater part of the legs 

 are pitchy; the breast and abdomen almost smooth and shining; the prosternum is 

 wrinkled, its intercoxal process margined by a line which becomes deeper behind so as 

 to form two fosses ; the apical segment of the abdomen is punctured. 



Crotch has apparently compared this species with his T. chaleea. The general form 

 and size are very much alike in the two species ; but the latter has a smooth head and 

 roughened front tibia?, and pertains to the genus Dasydactylus as here defined ; T. cenea 

 is, moreover, more distinctly brassy in colour above. It appears to be a commoner 

 species in the State of Panama than further north, and I have only seen two specimens 

 from Guatemala and one from Nicaragua. 



The specimen figured is from Cordova. The examples from this locality have the 

 head and thorax more coarsely punctured than those from other Mexican localities. 



2. Trapezidera semiotina. (Tab. I. fig. 4.) 



Ferruginea, nitida ; prothoracis limbo laterali lineaque mediana, scutello, elytrorum margin e reflexo, genibus, 

 tibiis, tarsis, trocbanteribus antennisque, nigris ; elytris crebre subtiliter punctatis, sutura postice cum 

 apice nigro-fuscis. Long. 12-17 millim. 2 ? 



Hab. Mexico, Panistlahuaca (Salle) ; Guatemala, Rio Maria Linda (Champion). 



Wider across the shoulders and more strongly narrowed to the apex than T. cenea ; 

 the elytra also having their apex almost truncate, though only the extreme apex, which 

 bears four or five distinct denticulations, is straight. The antenna? have the club narrow 

 and composed of five joints, while the preceding or sixth joint is nearly as wide as the 

 seventh. This species therefore differs from the generic formula of T. cenea, and may 

 possibly have to be separated ; it is not, however, a Teretilanguria, the ocular striola 



