406 SEEEICOENIA. 



POMACHILIUS. 



Pomachilius, Eschscholtz, in Thon's Archiv, ii. 1, p. 31 (1829) ; Candeze, Monogr. Elat. iii. p. 22. 

 Pomatochilus, Gemminger & Harold,, Cat. Col. v. p. 1541. 



The fifty-four described species of this genus are all from Tropical South America. 

 Two are now added from the State of Panama. 

 Elytra each produced into a long, sharp spine at the apex ; the fifth ventral segment 



also armed with a long spine spimfer. 



Elytra truncate at the apex, the outer apical angle acute; the fifth ventral segment 



unarmed mucronatus. 



1. Pomachilius spinifer. (Tab. XVIII. fig. 16.) 



Elongate, very narrow, rather convex, slightly shining ; black, the prothorax with the anterior margin bordered 

 with testaceous on either side behind the eyes, the hind angles usually obscure ferruginous ; the elytra 

 brown, with a very broad, common, triangular patch at the base, extending narrowly down the suture 

 to beyond the middle, and the extreme apex, piceous or black, in some specimens almost entirely piceous ; 

 the antennae piceous, with the basal joints sometimes reddish; the legs ferrugineo-testaceous ; above 

 and beneath thickly clothed with fine, decumbent, sericeous pubescence, the elytra also with a few 

 very widely scattered erect hairs towards the sides, the pubescence on the elytra fulvous, except on the 

 dark basal portion, that on the rest of the surface yellowish-cinereous. Head closely, finely punctate, 

 sharply margined in front; antennae slender, extending to considerably beyond the humeri in the male, 

 scarcely shorter in the female, joints 2 and 3 equal in length, the two together longer than 4. Prothorax 

 subcylindrical, much longer than broad, very slightly widening from the middle forwards, convex in 

 front; the hind angles narrowly and acutely produced, divergent, finely unicarinate, the carina placed 

 near the margin ; the surface densely, very finely punctate. Elytra very elongate, a little wider than the 

 prothorax, convex in front, slightly rounded at the sides, narrowing from about the basal third to the apex, 

 the apices each produced into a long, sharp spine ; punctate-striate, the interstices slightly convex, very 

 finely and closely punctured. Beneath densely, very finely punctate ; fifth ventral segment produced into 

 a long, fine, sharp spine at the apex. 



Length 8-9, breadth 1|-1| millim. ( tf 2 •) 



Hab. Panama, Volcan de Chiriqui 4000 feet (Champion). 



Eleven examples. This insect resembles P. linearis, Cand., &c, in its elongate, narrow 

 shape ;• but it has the apex of each elytron produced into a long sharp spine, and the 

 fifth ventral segment also armed with a sharp spine at the tip. It belongs to Candeze's 

 first section of the genus, and is perhaps nearest allied to his P. cuspidatus from 

 Venezuela. 



2. Pomachilius mucronatus. 



Elongate, very narrow, rather convex, subopaque ; black or brownish-black, the prothorax with the anterior 

 margin bordered with testaceous on either side behind the eyes, the hind angles sometimes obscure 

 testaceous, the antennae fusco-ferruginous, the legs flavo-testaceous ; above and beneath thickly clothed 

 with a fine, sericeous, decumbent, yellowish- or fulvo-cinereous pubescence. Head thickly, finely punctate, 

 sharply margined in front ; antenna? slender, nearly half the length of the body in the male, slightly 

 shorter in the female, joints 2 and 3 equal in length, the two together longer than 4. Prothorax sub- 

 cylindrical, much longer than broad, slightly widening from the middle forwards, convex in front ; the hind 

 angles very narrowly, acutely produced, divergent, finely unicarinate, the carina near the margin : the 

 surface densely, very finely punctate. Elytra elongate, a little wider than the prothorax at the base, 

 convex in front, slightly rounded at the sides, narrowing from about the basal third to the apex, the 



