STRONGYLIUM. 357 
Elytra comparatively short and convex, very finely and lightly striate-punctate ; antenne 
quite slender; eyes small; prothorax narrow, almost smooth; upper surface 
shining, greenish-violaceous, the elytra testaceous. 
27. Strongylium frontale. (Tab. XV. fig. 13, 2.) 
Elongate ovate, convex, greenish-violaceous, shining. Head coarsely and closely punctured, the vertex much 
more sparingly so, deeply longitudinally impressed between the eyes, of a greenish-golden tint, the basal 
half dark violaceous, the eyes feebly convex and rather widely separated; antenne (Q) moderately 
long, slender, very gradually widening outwardly, joints 3 and 4 long, subequal, 4 not wider than 3, 
5-9 gradually decreasing in length, 9 and 10 subequal, and each longer than broad, 11 ovate, and a little 
longer than 10, 1-5 greenish-wneous, 6-11 bluish-black, dull, the apical half of the eleventh testa- 
ceous; prothorax comparatively narrow. convex, rather broader than long, the sides immarginate, a little 
rounded, and very slightly narrowing in front, the anterior angles rounded, the hind angles subacute 
and outwardly directed, the base and apex nearly straight and moderately strongly margined, the 
basal fovee small but deep, the disc canaliculate behind, and impressed in the centre before the 
base, the surface with fine very widely scattered punctures, greenish-zneous, tinted with dark 
violaceous; scutellum triangular, smooth, bluish-violaceous; elytra somewhat strongly convex, rather 
abruptly declivous behind, moderately elongate, subparallel to beyond the middle, finely and lightly 
striate-punctate, the strie gradually becoming finer posteriorly, and nearly obsolete at the apex, the 
interstices smooth and perfectly flat throughout, the surface testaceous, the suture entirely and the lateral 
margins at the apex narrowly piceous; beneath violaceous, glabrous, the metasternal side-pieces and 
the flanks of the prothorax rather coarsely punctured, the rest almost smooth; legs rather slender, 
moderately long, sparingly punctured, greenish-violaceous ; first joint of the posterior tarsi shorter than 
the apical one. 
Length 11 millim.; breadth 4 millim. ( 2.) 
Hab. Panama, Volcan de Chiriqui 3000 feet (Champion). 
One example. This species in its system of coloration resembles 8. gerstaeckert and 
S. belti: it is readily separated from both by the very slender legs and antenne; the 
more cylindrical, smoother, and relatively narrower thorax; the more convex, shorter, 
and smoother elytra, &c. 
Elytra longer and less convex, finely striate-punctate; antenne stouter ; eyes small ; 
upper surface shining, more or less cyaneous or violaceous, the elytra testaceous. 
98, Strongylium gerstaeckeri. (Tab. XIV. fig. 22, 9 .) 
Strongylium gerstaeckeri, Makl. Monogr. p. 169; Act. Soc. Fenn. viii. part 1, p. 277°. 
Hab. Mexico, Cordova, Catemaco (Sallé); GUATEMALA, Senahu (Champion); Nica- 
RAGUA, Chontales (Belt, Janson); Costa Rica?; Panama (coll. F. Bates), Volcan de 
Chiriqui (Champion). 
This species varies considerably in size (13-202 millim.), and in the intensity of the 
punctuation and also in the colour of the elytra. Maklin describes the elytra of the 
male as pallid-testaceous, and those of the female as rufo-testaceous, but this is not 
borne out by the long series before me. Chiriqui examples are very large, and have 
the elytra very shallowly and very finely striate-punctate; others from Nicaragua have 
the elytra darker and of a redder tint, and more coarsely striate-punctate; and one 
