60 
MEMOIR OF RAY. 
siderable length, particularly those of the butterflies, 
but their value is greatly diminished by the difficulty 
in determining, owing to the want of plates and pre- 
cise characters, to what particular species they were 
designed to apply. Prefixed to the work there is 
a systematic arrangement of insects, which was at 
first published by itself under the title of Methodus 
Insectorum . He divides insects, including under that 
name intestinal vermes, earth-.worms, and leeches, 
into two primary sections ; those which undergo 
transformation, and those which do not change their 
form. The orders are variously characterized by 
the want or presence of feet, place of abode, struc- 
ture of the wings, form of the caterpillar, &c. The 
following is a tabular view of this arrangement from 
Kirby and Spence’s Introduction, which these ad- 
mirable authors have compressed into as small a 
space as possible, by using the Linnaean terms for 
metamorphoses, and reducing Ray’s tribes of Orthop - 
term , Hemiptera , and Neuroptera , to their modern 
denominations. 
