212 RHYNCHOPHORA. 
Elytra very much wider than the prothorax, subparallel in ¢, somewhat inflated posteriorly in 2; 
finely punctate-striate, the interstices flat, obsoletely uniseriate-punctate. Legs long and slender. 
Length 31-4, breadth 12-13 millim. (¢d @.-) 
Hab. Mexico, Oaxaca (Hége). 
Five specimens, two only in good condition. Near P. longicornis and P. mutabilis, 
but with more or less distinct alternate green and brown oblique fascie on the 
elytra; the antenne not quite so slender, distinctly shorter, and with a rather less 
elongate, stouter club; the eyes not larger than in P. longicornis ; the under surface 
with a few scattered metailic scales down the middle. 
6. Polydrosus immaculatus, sp. n. (Tab. IX. figg. 7, 7a, 2.) 
Oblong, ferruginous; thickly clothed with subopaque golden- or pale green scales, the metasternum and 
abdomen sparsely squamose down the middle, the femora with a few green scales. Rostrum constricted 
behind the points of insertion of the antennew, the nasal plate very short, angular behind, the scrobes 
narrow, descending to a little bencath the eyes, the latter large and prominent ; antenne long and 
slender, joint 1 of the funiculus elongate, 2 much shorter than 1, 3-7 slightly decreasing in length. 
Prothorax subcylindrical, constricted anteriorly, transverse, about as wide behind as the head with the 
eyes. Elytra subparallel in their basal half in ¢, broader and widened to the middle in 2; finely 
punctate-striate, the interstices feebly convex. Legs slender; anterior and intermediate tibie distinctly 
unguiculate at the apex. Penis-sheath of the ¢ narrow, parallel-sided, rounded at the tip. 
Length 34-4, breadth 13-13 millim. 
Hab. GuatEMALa, near the city (Salvin), San Gerdénimo (Champion). 
Six examples, one only in fresh condition. Near P. longicornis, but with the vesti- 
ture less shining, the scrobes narrower and longer, the antenne and legs less elongate, 
the elytra uniformly clothed with golden-green scales. PP. delicatulus, Horn, from 
Lower California, is a somewhat similar form, with smaller eyes, descending scrobes, 
a more transverse prothorax, shorter limbs, &c, 
7. Polydrosus macrocephalus, sp.n. (Tab. IX. figg. 8, 8 a, 3.) 
Elongate, narrow (¢), broader (@ ), black, the antenne ferruginous, with the apex of the scape and the 
club black ; thickly clothed, the legs included, with metallic green scales. Rostrum feebly constricted 
behind the points of insertion of the antenne, the nasal plate triangular, excised in front, and with a 
v-shaped ridge behind, the scrobes short and deep, the head slightly longer than the prothorax ; eyes 
large and prominent: antenne long and slender, joint 2 of the funiculus a little shorter than 1], 
3-7 slightly decreasing in length. Prothorax cylindrical, broader than long. Elytra much wider than 
the prothorax, subparallel in their basal half in ¢, broader in 9, the humeri tumid and rather promi- 
nent ; finely punctate-striate, the interstices rather convex. Legs elongate. 
Length 44-5, breadth 13-15% millim. (cd Q.) 
Hab. Mexico (Mus. Arit.), Iguala in Guerrero ([6ge). 
One male and two females, one of the latter with most of the scales on the upper 
surface discoloured and of an obscure cinereous tint. Differs from all the other forms 
here described in its long head and prominent humeri. The elongate legs and antenne 
separate P. macrocephalus from P. acuminatus. The single example (2?) in the 
