EXTERNAL ANATOMY OF INSECTS. 609 
merable irregular reticulations; in Mantzs sinuata* the 
whole tegmen has such reticulations but less nume- 
rous; in Locusta it is regularly reticulated at the base, 
but the areolets of the apex are quadrangular; in the 
Mantes, with oblong wings, all are quadrangular; in 
Prerophylla the longitudinal diverging nervures are not 
numerous, and the traversing ones cut them into qua- 
drangular and triangular areolets, besides which they 
are covered by innumerable impressed points, so as al- 
together to exhibit a most exact resemblance of the leaf 
of some evergreen: in Gryllotalpa the longitudinal ner- 
vures 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 Gryllus has been 
before described °; I shall only observe here, that the 
constructors of stringed instruments of music might, per- 
haps, from the tegmzna 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 con- 
volute direction, and so might produce something new 
in that department, corresponding with the serpents and 
French-horns in wind instruments. Of the Homopterous 
Hemiptera in the Fulgorella, which are most analogous 
to the Orthoptera of all that tribe, the longitudinal ner- 
vures are more numerous and branching, more especially 
toward the apex of the ¢egmen, and are traversed as 
much by transverse ones, sometimes reticulating the 
wing with roundish areolets, as in 2. laternaria, and at 
others with quadrangular ones, as in J. candelaria ; in 
* Linn. Trans, xii, 449, no. 96. > Vor, II. p. 391—. 
VOL, III. ZR 
