GONIOLANGTTEIA.— TEAPEZ1DEEA. o 



the single example from Purula to be the female of the same or a closely allied species) 

 are very wide, their basal joint as wide as the second, not hairy but with spongy soles 

 and finely pubescent above; in neither sex do the femora show any tubercles or 

 roughening, and the apical segment is not excised but bears a thick hairy patch. The 

 elytra taper more strongly than in Trapezidera or Teretilanguria, and their apex is 

 truncate with many denticules. The antennae have a distinct five-jointed club ; the 

 antennal sockets are large and open, but not so explanate as in the type of the genus ; 

 the ocular striola is deep and straight, divaricating behind from the canthus; the 

 epistoma is angular, entire at its apex, marked by a vague impression from the rest of 

 the head ; the labrum appears to be membranous, very much reduced, but set with 

 long shaggy fulvous hairs. 



The head in the hypothetical female from Purula is more strongly punctulate than 

 that of the Panama male type. 



TRAPEZIDERA. 



Trapezidera, Motschulsky, in Schrenck's Reisen und Forsch. Amur-Lande, ii. p. 244 (I860)*; 

 Crotch, CistulaEnt. i. p. 393 (1876). 



Motschulsky can scarcely be said to have characterized this genus ; it is merely a 

 name suggested for species of Languria with the apex of the elytra denticulate. Crotch 

 separates Teretilanguria for those species which have a double stridulating file on the 

 crown, and Goniolanguria for those which have a single file together with the apex of 

 the elytra truncate. Both these genera are good, and are further characterized here. 

 I find it necessary also to separate T. longicollis, Motsch. (= prolongates, Crotch, a name 

 adopted from Chevrolat's collection). This will leave for Trapezidera certain species 

 which have the thorax trapezoidal and the elytra with six or seven denticules at the 

 apex ; it will be represented by T. amea, Crotch, as a type. I think it probable that 

 T. angusticollis, Motsch., and some other of this author's species are identical with 

 T. cenea ; but the identification of these species does not seem possible from the 

 descriptions. 



I give a fresh definition of Trapezidera : — Elongate, but not more so than usual ; 

 antennae with the terminal four joints forming a flat and pubescent club, the seventh 

 joint not nearly so wide as the eighth and not so pubescent; orbital striola scarcely 

 leaving the canthus, but little produced backwards; prosternum flat and horizontal, 

 with a deep fovea on each side of the intercoxal process, its apex a little emarginate ; 

 shoulders of the elytra the widest part ; apical ventral segment punctured and pubes- 

 cent, not laterally excised (?) ; tarsi scarcely hairy in either sex, nor wider in the male 

 than in the female. 



* Motschulsky (Etudes Ent. 1859, p. 66) had already used the name Trapeziderus for a genus of Staphy- 

 linidEe ; I, however, follow Crotch in retaining Trapezidera. 



B* 2 



