MOUNT KORAniA IN BRITISH GUIANA. 73 



blackish, with two whitish bands near each extremity, second joint about \ as long as 

 the first, whitish, with the extremity blackish ; third joint about as long as first, blackish 

 towards the l)ase, and yellowish beyond, blackish again at its junction with the fourth 

 joint, which is yellowish and about as long as tlie second. Front lobe of thoi-ax with two 

 strong erect spines at the back ; middle lobe with four, two in the middle, and two lateral, 

 all at about equal distances apart. Clavus brown. First joint of rostrum yellowish, the 

 remainder deep black, the tip extending just beyond the base of the head. Legs 

 unarmed, thickly pubescent, more or less blackish on the outer side ; tarsi black. 

 A])dorninal segments with four small lateral spines on the basal half, and three long, 

 triangular, whitish, lateral spots on each side beyond the middle. Scutellum with a 

 very slight terminal spine, if any. 



Roraima, 3500 feet. 



This curious insect does not seem to have much resemblance to any described species 



HEMIPTERA HOROPTER A. 



FULGORIDyE. 

 acriephia perspicillata. 



Cicada perspicillata, Fabr. Spec. lus. ii. p. 3.22. u. 1 (1781). 

 Roraima, 3500 feet. 



NEUROPTERA ODONATA. 



LIBELLULID.E. 

 Sympetrum gilvum. 



Dip/ax illotum, var. gilva, De Selys, Ami. Soc. Eat. Belg. xsviii. p. 43 (ISSi). 

 Roraima, SGOO feet. 



O R T H P T E R A. 



LOCUSTID.E. 

 Chromacris speciosa. 



Gryllus speciosus, Tluaib. IMtjm. Petersb. ix. p. 40, pi. 11. fig. 1 (1821). 

 Roraima, 3500 feet. 



EXPLANATION OF PLATE 6, 



Fig. A. Acrocoris perarniata, sp. n. 



Fig. B. „ „ profile of head. 



