STRONGYLIUM. 353 
slender towards the base, the thorax more coarsely and closely punctured, the elytra 
with the excavations still more intricate and irregular, and the interstices subcostate 
towards the base and raised and here and there obliquely confluent behind, the first 
joint of the posterior tarsi shorter, &c. S. variicorne is, however, somewhat closely allied 
to the Brazilian S. leproswm (Germ.), Makl., but differs in the much coarser excava- 
tions of the elytra and in the rows of excavations extending from the base to the apex. 
The male will doubtless prove to have much longer antenne and longer and slightly 
curved anterior tibize, as in the corresponding sex of that species. 
20. Strongylium costaricense. (Tab. XV. fig. 10, o.) 
Moderately elongate, slightly convex, greenish-sneous, the head and prothorax with golden and cupreous 
tints, shining. Head coarsely and subrugosely punctured, the vertex a little smoother, shallowly longi- 
tudinally impressed between the eyes, the latter moderately large and separated by a narrow space ; 
antenne ( ¢) rather short, scarcely reaching to the first fourth of the elytra, slender, subfiliform, joints 3 
and 4 long, subequal, the penultimate joints much longer than broad and but little widened outwardly, 
the apical joint oblong ovate, ferruginous, joints 5-7 a little darker and tinged with cyaneous, the basal 
joint of a golden-green tint; prothorax transverse, but not strongly so, moderately convex, the sides 
immarginate, straight behind, a little rounded and narrowing in front, and armed with a short tooth 
about the middle, the apex nearly straight, the base slightly sinuate, both strongly margined, the anterior 
angles rounded, the hind angles subrectangular, the disc distinctly canaliculate (more deeply so at the base 
and apex), and with a deep transverse impression on each side a little above the broad deep basal fovee, 
and another shallower one on each side a little before the middle, the surface with scattered very coarse 
punctures; scutellum triangular, almost smooth, cupreous in tint; elytra moderately long, the disc a 
little flattened from about the basal third to the apex, very gradually narrowing from the base, the sides 
almost straight to beyond the middle, the surface from the base to the apex with irregular and much inter- 
rupted rows of very coarse and deep excavations, the excavations coarsest and deepest and here and there 
confluent on the middle of the disc and towards the sides, more crowded at the base, and finer and shallower 
(but not placed in deep grooves) at the apex, the interstices quite smooth and shining; beneath more 
shining, bright greenish-zneous, much tinted with golden, almost glabrous, moderately finely and rather 
sparingly, the flanks of the prothorax and the sides of the metasternum and side-pieces very coarsely, 
punctured ; legs rather long, moderately slender, the femora and tibie roughly and rather closely punc- 
tured and golden-cupreous in tint, the tarsi cyaneous, the first joint of the posterior tarsi as long as the 
apical joint; anterior tibise very slightly curved, and the fifth ventral segment shallowly transversely 
impressed in the middle behind, in the male. 
Length 12 millim.; breadth 4 millim. (<.) 
Hab. Costa Rica (Van Patten). 
One example. ‘his species is allied to S. viridipes, from which it is distinguished 
by the posteriorly flattened disc and coarser excavations of the elytra (the excavations 
not placed in deep grooves at the apex), the differently coloured and shorter antenne 
(in the male), the more coarsely punctured thorax (the sides of which are toothed in the 
middle), the roughly punctured femora, the shorter tarsi, &c. 
Other allied undescribed forms inhabit Tropical South America. 
BIOL. CENTR.-AMER., Coleopt., Vol. IV. Pt. 1, January 1888. 977 
