34 SEERICOENIA. 



The forehead has a shallow horseshoe-shaped impression. The thorax differs in form 

 from that of any other species known to me ; it has a very slight shallow impression on 

 each side near the front margin, and a more evident one behind it ; nearer to the lateral 

 margin and behind the lateral angulation there is a small round impression. The 

 scutellum is rather more than half the length of the thorax, very broad at the base, 

 very acuminate at the apex. Each elytron has three costse, and there is a slight indi- 

 cation of a humeral one. The under flanks of the prothorax are closely punctured 

 (finely and confluently so near the coxae) ; but there is a short, smooth, arcuate line, 

 nearly parallel with the posterior margin, commencing at the lateral angulation, and 

 extending towards, but not reaching, the line of the prosternum. This smooth line is 

 generally present in the species of this group ; usually, however, it is a raised line, 

 and much more directed forwards. 



2. Colobogaster cyanitarsis. 



Colobogaster cyanitarsis, Lap. & Gory, Mon. ii. p. 6, t. 1. f. 4 \ 



Ilab. Mexico, Oaxaca (Salle). — Colombia; Brazil 1 ; Bolivia (Brit. Mm.). 



A single example from M. Salle's collection appears to me to be referable to this 

 species. It differs, however, from any specimens in the British-Museum collection in 

 having the posterior angles of the thorax obliquely turned in. This is not a character 

 upon which I should venture to describe a new species from a single example, as indi- 

 viduals in this genus are somewhat liable to variation in this respect. 



3. Colobogaster infra-viridis. 



Colobogaster infra-viridis, Thorns. Typi Bupr., Append., i. p. 39 (1879) \ 

 Hab. Mexico 1 . 



M. Thomson states that this species differs from C. cyanitarsis in having the thorax 

 somewhat hexagonal. It does not, however, appear to be the insect from M. Salle's 

 collection, described above as C. puncticollis. 



4. Colobogaster chlorosticta. 



Bvprestis chlorosticta, Klug, Nova Acta Acad. Leop. -Carol. Nat. Cur. xii. pt. 2, p. 421 (1825) '. 

 Colobogaster hopei, Lap. & Gory, Mon. ii. p. 7, t. 1. f. 5 2 . 



Hab. Nicaragua, Chontales (Janson). — Colombia ; Brazil l 2 (Brit. Mils.). 



A single example from Nicaragua only differs from Brazilian specimens in having 

 the elytra less shining, and with the green spots before the middle confluent and 

 forming a band. 



