CHAP it Re Viitt: 
AP USCIS, QUITE let Je ah 1a, IK WN. 
THERE are not many typical forms amongst the Orthoptera. 
Most of them are well known, and the Earwigs, the Crickets, 
the Grasshoppers and the Locusts, are the familiar examples. 
If we institute a comparison between the Orthopftera and the 
Coleoptera some very interesting results may be obtained. So 
far as their structures are concerned there is a great general 
likeness between the two groups, but there are enormous dif. 
ferences as regards the progress of their development. Fhe 
Orthoptera are insects that bite and browse like the Ccleoptera, 
and the structures of their mouths are not more unlike than 
they usually are in families belonging to the same order. The 
organs of flight, however, distinguish the Orthoftera from all 
other insects. The anterior wings differ in their texture and 
general form from the posterior, they are of almost leathery con- 
sistence, and with one exception they cross cach other when the 
insect is quiet. The hind wings are very characteristic. They are 
membranous, much veined, and their large nervures are almost 
like straight sticks. These wings fold themselves up longitudinally, 
like a fan, hence the name of Orthoptera (op@os, straight ; arTepa, 
wings). : 
If we only find moderate differences between the adult O7- 
thoptera and Coleoptera, there are nevertheless very great differ- 
ences between them in the early part of their existence. The 
earwigs, the crickets, and the grasshoppers, on leaving the egg 
have the form, the appearance, and almost all the characteristics 
of the adults whose method of life they also follow. Whilst the 
