POLYDROSUS. 211 
the middle of the disc, and various other, scattered, asymmetrical, transverse or oblique spots, sparsely 
clothed with minute fuscous scales, the prothorax sometimes with two dark lines on the dise anteriorly, 
the upper surface also set with very short, curled, decumbent hairs, the metasternum and abdomen with 
a broad space down the middle free from scales and sparsely clothed with extremely fine hairs. Rostrum 
constricted behind the points of insertion of the antenne, the nasal plate arcuate, short, the scrobes short 
and deep. Antenne extremely slender, reaching at least to the middle of the elytra; joint 1 of the 
funiculus elongate, 2 a little shorter, 3-7 gradually decreasing in length, the club long. Eyes moderately 
large. Prothorax short, subcylindrical, as wide as the head with the eyes. Elytra much broader than 
the prothorax, moderately long, subparallel in ¢, inflated posteriorly in 9; finely punctate-striate, the 
interstices almost flat, obsoletely uniseriate-punctate. Legs long and slender; intermediate tibie feebly 
unguiculate at apex in ¢. 
Length 8-332, breadth 13-12 millim. (¢ @.) 
Hab. GuateMALA, Duefias (Champion). 
Seven specimens, varying a little in the development of the scattered, asymmetrical, 
partly denuded spots on the elytra. A small, graceful form, with golden-green scales, 
and long, slender, pallid antenne and legs. It approaches the European P. ptery- 
gonalis, Boh., and belongs to the section Hustolus, Thomson. 
4. Polydrosus mutabilis, sp.n. (Tab. IX. figg. 4, 3; 5, 2, var.) 
Very like P. longicornis, but with the green scales less shining and sometimes largely (as in two of the three 
specimens from Panama) replaced by others of a pale cupreous tint (leaving only a streak along the inner 
margin of the eyes and one or two spots on each elytron green), or with cupreous scales intermixed, the 
prothorax with two or three lines or streaks, and the elytra with various scattered irregular spots, 
fuscous in the examples with green scales ; the metasternum and abdomen with a very broad space down 
the middle free from scales. Eyes very large. Prothorax narrower than the head with the eyes, cylin- 
drical. Llytra slightly widening to the middle in ¢, very broad and inflated in 2. Intermediate 
tibise without visible uneus in ¢. 
Length 35-474, breadth 14-1? millim. (d 9.) 
Hab. Costa Rica, Piedras Negras, Tucurrique (U.S. Nat. Mus.: 9); Panama, 
Caldera in Chiriqui, San Lorenzo (Champion: 3 2). 
Six examples—four with green scales predominating, the others (including the male 
selected as type) with the green scales clustered into one or two small patches on each 
elytron. ‘The still larger eyes (especially in the male) and the broader and more 
inflated elytra sufficiently distinguish P. mutabilis from the more northern P. longi- 
cornis, apart from any difference in the colour of the scales. ‘The very broad non- 
squamose space beneath is clothed with extremely fine scattered hairs. 
5. Polydrosus partitus, sp.n. (Tab. IX. fig. 6, 2.) 
Oblong, obscure ferruginous, the antenne and legs testaceous; thickly clothed with small golden-green and 
pale brown scales, the former condensed into two vitte on the disc of the prothorax and three more or 
less distinct oblique fascie on each elytron; the under surface with pale green scales, almost bare down 
the middle. Rostrum constricted behind the points of insertion of the antenne, the nasal plate very 
short, arcuate, the scrobes short, angular, and deep. Antenne very slender, moderately iong, the scape 
about reaching the front of the prothorax; joint 2 of the funiculus a little shorter than 1, 3-7 slightly 
decreasing in length. Prothorax transverse, subcylindrical, about as wide as the head with the eyes. 
2EHE 2 
