474 Mr. H. W, Bates on a Shujlng CrlcJcet 



ever, is longer, suffused at the margins with rufous, and more 

 sparingly and more deeply punctured. I know no other species to 

 which it is possible to refer this form, except perchance H. genicu- 

 latus, Thomson, and H. acutangulus, Thomson, of which I regret 

 that I have no knowledge. 



Of the examples before me, two were taken in a stream in Brad- 

 gate Park, Leicester, by Dr. Power, in August 1855 ; one in a stream 

 at Black Park, Uxbridge, in August 1856, also by Dr. Power ; and 

 one in a stream in Tilgate Forest, by Mr, Brewer. In the cabinets 

 of Dr. Power, Mr. Brewer, and the Rev. Hamlet Clark. 



XXXV. — Description of a remarTcahU Species of Singing Crichet 

 (Locustarife) from the Amazons, supposed to he new to science. By 

 H. W. Bates, Esq. 



Order ORTHorTEEA. 



Family Locustariae, Latreille. 

 (Gryllidae, Leach, "Westwood). 



Genus Chxoroccelus*, n. gen. 



Palpi -vnth their terminal joints elongate, gradually and slightly thickened 

 towards their tips ; the maxiUaries more than double the length of the 

 labials. Prothorax rather short ; surface plane, sloping upwards poste- 

 riorly, without ridges or spiues, but with a trausverse central furrow ; 

 sides vertically deflexed ; hind mai'gin slightly produced in the middle, 

 and roimded. Pro-, mesa-, and metasterna of moderate breadth, each 

 armed with a pair of corneous tooth -like processes. Antennce setaceous, 

 not so long as the body; basal joint oblong, thick, its external anterior 

 angle slightly produced. Legs moderately long, stout; the thighs fur- 

 nished beneath with a row (the anterior with two rows) of very small 

 deuticulations ; the tibia} angular, and also finelj^ denticulate or spinose 

 beneath ; the anterior thighs are arcuate above, which makes them 

 broader in the middle than at either end ; the hind legs are short com- 

 pared with their usual length in this family, reaching only 2 or 3 lines 

 beyond the tips of the closed elji;ra. Head large, -ndth an obtuse point 

 between the antennie ; forehead nearly square, the sides with a smooth 

 longitudinal ridge. Eyes small, globular. Elytra of parchmenty 

 texture, extremely broad and convex, giving to tlie insect, when closed, 

 a bloated, vesicular appearance ; they sm-pass the abdomen by nearly 

 one-half their length, and are obtuse and roimded at their tips ; the 

 longitudinal nervure is strongly bent before the middle of its course ; 

 the broad costal space is crossed by a number of long transverse nervm-es, 



* From xXuipbs, green, and koIXos, hollow. 



