EXTERNAL ANATOMY OF INSECTS. 611 



the apex are quadrangular; in the Mantes, with oblong 

 wings, all are quadrangular ; in Pterophylla K. the 

 longitudinal diverging nervures are not numerous, and 

 the traversing ones cut them into quadrangular and tri- 

 angular areolets, besides which they are covered by in- 

 numerable impressed points, so as altogether to exhibit 

 a most exact resemblance of the leaf of some evergreen : 

 in Gryllotalpa the longitudinal nervures of the Anal Area 

 rather converge towards the apex, are traversed by few 

 transverse nervures, and those of the Costal Area which 

 diverge from the mediastinal nervure by still fewer ; the 

 neuration of Aclieta F. has been before described a ; I 

 shall only observe here, that the constructors of stringed 

 instruments of music might, perhaps, from the tegmina 

 of the male, the nervures of which probably modulate 

 the sounds which it produces, take a hint for giving the 

 strings in them a serpentine or convolute direction, and 

 so might produce something new in that department, 

 corresponding with the serpents and French-horns in 

 mind instruments. Of the Homopterous Hemiptera in 

 the Fulgorellce Latr., which are most analogous to the 

 Orthoptera of all that tribe, the longitudinal nervures are 

 more numerous and branching, more especially toward 

 the apex of the tegmen, and are traversed as much by 

 transverse ones, sometimes reticulating the wing with 

 roundish areolets, as in F. laternaria, and at others with 

 quadrangular ones, as in F. candelaria ; in some of these 

 however, as Otiocerus K., Flata F., &c. b , there are no 

 traversing nervures ; and these lead to the Cercopidce 

 and others in which the longitudinal nervures become 



» Vol. I. p. 395 -. 



h Linn. Trans, xiii. t. i. /. 1 4. Flata should come before this genus, 

 2 R 2 



