Genus aiid Species of Apterous Locust. 



381 



extremity ; arolium * well-marked. Hind femora very loncr^ 

 extending for one fourth of their length beyond the abdomen, 

 straight and rather slender, covered with large raised warts 

 both on the carinaj, which are rather indistinctly marked, and 

 on the surface ; the two upper carinte are close together, and 

 the innermost is set with a row of larger blunt teeth than are 

 visible elsewhere. Hind tibiae as long as the femora, slightly 

 incurved towards the base, the upper surface with seven or 

 eight strong and nearly straight spines on each side, not 

 symmetrical, but the outer ones placed beyond the level of 

 the inner, almost halfway between; no terminal spine on t'.ie 

 outer row. 



Opaon granulosus, sp. n. 



Long. corp. 36 millim. ; long. fem. ant. 9 millira. ; long. 

 fern. post. 26 millim. 



Headj antenna?, and greater part of abdomen black ; palpi 

 AAhitish ; thorax, basal segment of abdomen, and hind legs 

 bright red, except a black spot on the side of the first segment 

 of the abdomen, enclosing a large yellow spiracular spot ; 

 spines of hind tibia; black ; four front legs and hind tarsi of 

 a lighter red, with the spines and claws black. 



One female specimen from Paramba, in Ecuador. 



This curious insect will probably require a new famil}^ for 

 its reception, when more specimens, representing both sexes, 

 are obtained. In the structure and proportions of the legs &c. 

 it shows some resemblance to Opomala viridis, Serv., and I 

 therefore place it provisionally in the neighbourhood of that 

 insect, which, however, is a winged and comparatively 

 smooth species. 



* This word is used by several continental entomologists for the pad 

 ■between the claws which is present in many insects. It looks like a 

 classical word, but I have been quite unable to trace its derivation from 

 any language with which I am acquainted. 



