PHYSIMEEUS.— THHASYGCETJS. 465 



the description of which they agree in the main points. Clark gives, however, the 

 colour as tawny brown ; that in the specimens before me might be called piceous, and 

 the colour of the head and thorax black ; the lower portion of the face is testaceous or 

 fulvous, and smooth, and the pubescence of the entire upper surface is very scanty and 

 of a yellowish-white colour ; the antennae are rather short and robust, the third joint 

 being the longest ; all the rest agrees with the description. 



13. Physimerus (?) nigripennis. (Tab. XXVI. fig. 22.) 



Piceous ; head, thorax, and the base of the femora fulvous ; elytra black, finely pubescent, distinctly punctate- 

 striate ; head produced ; thorax finely punctured. 



Length 1^-2 lines. 



Head distinctly longer than broad, the vertex obsoletely punctured ; the lower part of the face concave, divided 

 by a narrow central ridge, shining, fulvous ; palpi scarcely thickened at the penultimate joint ; antennae 

 filiform, black, two thirds the length of the body, the third joint slightly longer than the fourth ; thorax 

 very slightly longer than broad, the sides perfectly straight, more or less distinctly narrowed at the base, 

 the surface rather flattened, transversely depressed near the base, finely rugose-punctate, thinly clothed 

 with pubescence, the disc in some specimens ( $ ) with a central longitudinal ridge near the base ; scu- 

 tellum fulvous ; elytra black, clothed with thin whitish pubescence, rather strongly punctate -striate, the 

 interstices somewhat costate in the female, the base without any depression or elevation ; legs piceous or 

 more or less marked with fulvous ; posterior tibiae with two spurs ; claws appendiculate. 



Hab. Panama, Bugaba, David (Champion). 



The produced head and the double spur to the posterior tibia? are characters strange 

 to the genus Physimerus, at least amongst the typical forms ; I have, however, pro- 

 visionally placed the present species in Physimerus rather than establish another genus 

 on characters which in themselves are not always found to be constant. There is, 

 moreover, some doubt attached to the double spur of the tibiae in P. nigripennis, one 

 of them being very small, but the other of large size, so that it is possible to describe 

 the tibiae as having one spur. P. nigripennis resembles in colour and size P. inomatus, 

 Clark, but differs in the shape of the head and in the longer thorax. 



THEASYGGEUS. 



Thrasygceus, Clark, Cat. Halticidse, p. 102 (1860). 

 Eupeges, Clark, loc. cit. p. 107. 



The filiform or at least scarcely thickened maxillary palpi and the bifid claws' are 

 the principal distinguishing characters of this genus. In examining a type-specimen of 

 Clark's genus Eupeges, E. scabrosa, from Brazil, which that author has separated from 

 Thrasygceus on account of the supposed unarmed tibiae, I find that the latter are pro- 

 vided with a long and distinct spur, at least in the species I have before me ; and if 

 this should prove to be the case with the two others described by Clark, there is 

 no further' reason to separate Eupeges from Thrasygceus, with which it agrees in all 

 other respects. Both genera, containing some few described species, are peculiar 



biol. CENTE.-AMEE., Coleopt., Vol. VI. Pt. 1, July 1886. 3 



