than from any developmental relations, we have considered it, ' on the 

 authority of many entomologists, as homologous to the lingua in other 

 insects. 



After thus considering the oral sppendages at considerable length 

 for so short a paper, as they ai'e the parts which render the order most 

 annoying, if not to ourselves at all events to our domestic favourites, 

 we must hasten on to describe some of the other parts in the anatomy 

 of these insects. 



The antennfe are hidden in the gi'ooves which run obliquely back- 

 wards and downwards across the head, and it is but seldom, and then 

 only in a few species, that we see them carried erect. Behind the 

 groove on each side a row of small hairs is usually present. The 

 antenna itself" is composed of three segments, tlie third being divided 

 by a number of transverse membraneous joints by means of which it 

 can be lengthened and shortened at the pleasure of the insect. On the 

 back of this segment can be seen in some .species a number of small 

 sacs which are probably auditory. Towards its base it contracts con- 

 siderably to the point where it articulates with the second segment. 

 A row of strong bristles is often present around the anterior end of this 

 latter, standing like guards around the terminal segment. 



The thorax is small and composed of three separate segments pro- 

 tected by a chitinous covering, each composed of a dorsal piece or 

 notum, and two lateral pieces or pleurae, which latter are largely 

 developed at the expense of the sternum. The pleurae are more or less 

 freely joined to the notum, the anterior ones being thrown forward 

 almost under the head. On the posterior boi-ders of the pleurae of the 

 two hinder segments of the thorax small scales are present, which by 

 some entomologists are considered as rudimentary wings, though by 

 others this homology is denied. The pronotum on its hinder border is 

 often provided with a collar of bristles which from their diflferent size 

 and number serve as good characters for distinguishing the species. 



The legs, which are attached to the pleurae of the three thoracic 

 segments^ are large, increasing in size from the first to the third pair, 

 and adapted for leaping. The whole leg is, like the rest of the body,, 

 laterally compressed, and consists of five joints, viz., the very large^ 

 coxa, the trochanter, the femur, the tibia, and the tarsus or foot, which 



