298 NATURAL HISTORY. 
506. The insects of the order Aphaniptera, the Fleas 
and their allies, have only the most indistinct rudiments 
of wings; but the metamorphosis is complete. The lar- 
vee inclose themselves in small silk cocoons to pass into 
the imago state. The 
common Flea, a mag- 
nified representation of 
which is given in Fig. 
231, has a curious ap- 
paratus for sucking 
blood, which is very 
beautiful as examined 
with a microscope. 
This insect, like other 
great leapers, as Grasshoppers, Frog-hoppers, ete., has 
very large hind legs. 
\ 
Fig. 231.—Flea. 
507. In the order Apte- 
ra, or wingless insects, are 
found the different kinds of 
Lice which infest different 
animals. In Figure 232 is 
represented the common 
= Louse; at a of the ordinary 
size, at 6 magnified. At ¢ 
is one of its legs magnified 5 
at d are its eggs, also mag- 
nified. 
Questions. —W hat is said of the haustellate apparatus of the Hemip- 
tera? What gives them their name? What is said of their meta- 
morphosis? How are the Cicadas an exception to this? What is 
said of the Red-eyed Cicada? What of the Frog-hoppers? De- 
scribe the Aphide and their habits. What is said of their honey- 
dew? What is said of the scale-insects? What of Cochineal ? 
What is said of some aberrant bugs of this order? What is said of 
the extent of the order Diptera? What of the size of these insects ? 
What are their peculiarities? What is said of their larvae? What 
is said of Flies? What are Cheese-hoppers? Describe their mode 
of leaping. Describe the larve of the common Musquito. Describe 
