2G2 Mr. H. W. Bates on Ceramhycidce 



Genus Chlorida. 



Serville, Ann. Soc. Ent. Fr. 1834, p. 31; Lacord. Gen. 

 viii. 289. 



1 . Chlorida /estiva. 



Cerambyx festivus, Lin. Syst. Nat. ii. 623. 



This common and well-known tropical American insect 

 is generally distributed throughout the Amazons region. 

 I found it frequently at night, especially at sugar smeared 

 on palings to attract moths. 



2. Chlorida curta. 

 Thomson, Archives Entomologiques, i. 288. 



Similar to Chl.festiva; but different in the markings 

 of the thorax, and in the distinct sharply-elevated costse 

 of the elytra, especially the lateral one, which extends 

 from the humeral callus to near the apex, where it joins 

 the two inner ribs. The antennse are black, with the basal 

 joint red. The upper surface of the head is black. The 

 thorax is dark red, with a very broad vitta on each side, 

 and a central spot or stripe, very much wider on the fore 

 margin than on the hind, black ; the surface of the thorax 

 is uneven and coarsely sculptured, as in Chi. f estiva. 

 The elytra are somewhat shorter relatively than in Chi. 

 /estiva, and besides the strong elevation of the ribs, offer 

 a differential character in the thick punctuation of all the 

 basal portion. Body beneath and legs red. 



Long. 10 lin. ? . 



The species offers a very remarkable feature, unnoticed 

 by its original describer, in the apex of the abdomen 

 (in the 9 at least) being greatly dilated and swollen ; 

 the edge of the last ventral segment is straightly trun- 

 cate, but the pygidium, or last dorsal segment, is rounded, 

 slightly sinuate in the middle and on each side. This 

 feature forms the chief character of Lacordaire's " Groupe 

 Torneutides ;" and it is a further instance of the insta- 

 bility of diagnostic characters in the Lomjicornia, that an 

 isolated member of a distinct group should show it in so 

 high a degree of development. 



Hah. — Ega. 



