CLASS V. IN3ECTA. 
139 
Order IV. Dermaftera. — Wings two, longitudinally and trans- 
versely folded. Elytra subcrnstaccous, abbreviated, with the suture 
straight. Mouth with mandibles. ( Metamorphosis semi-complete.) 
Order V. Orthoptera. — Wings two, longitudinally folded, covered 
by two coriaceous elytra, the margin of one elytron covering the same 
part of the other. Mouth with mandibles. ( Metamorphosis semi-com- 
plete.) 
Order VI. Dictyoptera. — Wings two, longitudinally folded, twice 
or more, covered by two coriaceous elytra; one elytron decussating 
the other obliquely. Mouth with mandibles. ( Metamorphosis semi- 
complete.) 
Order VII. IIemiptera. — Wings taro, covered by two crustaceous 
or coriaceous elytra (the tips of which are generally membranaceous), 
horizontal, one decussating the other obliquely. Mouth with an arti- 
culated rostrum. ( Metamorphosis semi-complete.) 
Order VIII, Omoptera. — Wings two, covered by two elytra which 
a re entirely coriaceous or membranaceous ; meeting obliquely with a 
straight suture. Mouth with an articulated rostrum. ( Metamorphosis 
semi-complete or incomplete.) 
. Order IX. Aptera. — 1 Vo wings or elytra. Mouth with a tubular 
Jointed sucking rostrum. ( Metamorphosis incomplete.) 
Order X. Lepidoptera. — Wings four, membranaceous, covered with 
Uical-like scales. Mouth with a spiral tongue. ( Metamorphosis incom- 
plete.) 
Order XI. Trichoptera. — Wings four, membranaceous; the ptcri- 
gosi ia or wing bones hairy. Mouth with maxilla; and lip. ( Metamor- 
phosis incomplete.) 
Order XU. Neuroptf.ra. — Wings four, membranaceous, generally 
equal size, with numerous decussating pterigostia resembling a net- 
"ork. Mouth with mandibles, maxilla', and lip. ( Metamorphosis in- 
complete or semicomplete.) 
Order XIII. Hymenoptera. — Wings four, membranaceous, the 
cinder ones always smallest ; the pterigostia not decussating each other, 
s o a s to resemble a net-work. Mouth with mandibles, maxilla: and lip. 
V Metamorphosis incom p (ete.) 
Order XIV. Rhiptpteba. — Wings two, longitudinally folded. Mouth 
" "-h mandibles. ( Metamorphosis subcoarctate.) 
Order XV. Dipxera. — Wings two, with halteres or balancers at 
'heir base. Mouth tubular, formed for sucking. ( Metamorphosis in- 
c °niplete or subcoarctate.) 
Order XVI. Omaloptera. — Mouth furnished with mandibles and 
