MOTIONS OF INSECTS. 329 



the four last, not excepting the claw-joint, there is a 

 minute orbicular concave one, resembling a sucker. 

 In others {B. gigantea, &c.) they extend the length 

 of the four first joints, and are very conspicuous. In 

 some (B. Moujfeti, K-^)? which have no claw-sucker, 

 there appears to l)e a cavity in the extremity of the 

 claw-joint, which may serve the purpose of one. These 

 cushions are usually of a pale colour; but in one speci- 

 men of a hairy female which I have, from Brazil, they 

 are black. The spectre genus (Phastna) exliibits no 

 particular varieties in this respect. The tarsal joints 

 of the legs have cushions at their apex, which appear 

 to be bifid. They have a large orbicular sucker be- 

 tween tlie claws. In Mantis the fore legs have neither 

 of the parts in question, and the others have no suckers. 

 They have cushions on the four first joints of the two 

 last pair of legs, which, though smaller, are shaped 

 much like those in Phasma. In Locusta the feet have 

 no suckers between the claws, but they are distinguish- 

 ed by two oval, soft, concave, and moveable processes 

 attached to the base of the first joint of the tarsus, 

 which probably act as suckers'". In this genus there 

 are two cushions on the first joint of the tarsi, and one 

 on each of the two following ones*^. — The species of 



^ This insect, which is remarkable for having the margin of its thorax 

 reflexed, was long since well figured in Mouffct's work (130. jig.infima). 

 It has not, however, been described by any other author I have met with. 

 It is common in Brazil. Some specimens are pallid, while others are of 

 a dark brown. 



" De Gecr, iii. 421. t. xxi. /. 13. h. This author has also noticed the 

 cushions in this genus and Giyllus, and the claw-sucker in tlie latter, which 

 he thinks are analogous to those of the fly. /AW. 462, t. xxii. /. 7-8. 



• Philos,Tian$. i8l6. t,xx\. f.8A3. 



