tioo new genera and species of Coleojitera, 8fc. 265 



same length as tlie 3rd, but narrower at the base, and 

 with the apical angle very gradually more produced ; the 

 10th joint a little narrower, the 11th narrow, lanceolate, 

 constricted before the apex. Eyes widely separated above 

 and below, semicircularly emarginate in front, coarsely 

 granular. Thorax tubercular above, with a single short 

 spine at the side. Scutellum slightly concave, scarcely 

 narrowed towards the apex, which is rounded. Elytra 

 subparallel, the surface imeveu, obtuse and iraarmed at 

 the apex. Legs short, femora compressed, spines at the 

 apex of the tibire very short and seen with difficulty; 

 tarsi as in Ploccederus, but much shorter, the claw joint 

 very slender at the base, but rather broad at the apex. 

 Mesosternal process not very broad, slightly narrowed 

 posteriorly and emarginate at the apex. Prosternal pro- 

 cess very narrow, arched posteriorly. 



The position of this genus is somewhat doubtful. It 

 appears to belong to the true Ceramhijcidce of Lacordaire. 

 The obtuse tubercles on the thorax, the form of the 

 scutellum, the wrinkled elytra (which have no spine at the 

 apex), and the arched prosternum are, howevei", somewhat 

 foreign to this family. On the other hand, the general 

 form and the structure of the antennae most nearly 

 approach Prospliihis. The ligula is membranous and is 

 completely bilobed, crescent-shaped. On the whole, it 

 seems best to place the genus before Taurotagus. 



Opsamates dimidiatiis, sp. n. 



Niger, nitidus, parce pubesccns ; antennis flavo-ferru- 

 gineis, articulis duobus basalibus nigris, thorace dorsim 

 tuberculis obtusis quinque instructo, elytris dimidio basali 

 flavo, inajqualibus, discrete punctatis. 2 . 



Long. 13 lin. 



Head very short, the eyes a little prominent laterally, 

 not sm-rounding the insertion of the antennas so much 

 as in Plocoiderus. Thorax slightly transverse, a little 

 broader than the head, with sparse (but rather long) 

 black pubescence, Avith a not very prominent tubercle in 

 the middle of the side, and a slight angular prominence 

 immediately in front of it, with seven tubercles above ; 

 there is also a very small tubercle behind the lateral 

 tubercle. Elytra one-third broader than the thorax, 

 parallel, together rounded at the apex, with rather more 



