COLEOPTERA, OR SHEATH-WINGED INSECTS. 247 
being more effective in this respect than the Beetles 
themselves. They are about half an inch long, of a 
bluish color with four or six yellow spots, and are seen 
creeping along branches and leaves in search of the 
plant-lice. After living in the larva state for a fortnight, 
they fasten themselves on some leaf, 
cast off their skins, spin a cocoon, and, 
after a fortnight’s sleep, issue as Lady- 
birds. One of the species, the North- 
ern Lady-bird, is seen in Fig. 190. It 
is found chiefly on the pumpkin vine, 
ary one where, in the company of their larve, 
they feed on the Plant-lice and the lar- 
ve of the Squash Bug. ] 
424. The Tiger Beetles, of which two species are- 
represented in Figs. 191 
and 192, are thus named 
. both on account of their 
variegated colors and 
their rapacity. They feed 
on Caterpillars, Flies, and 
other Beetles, and will 
even devour each other 
when shut up together. Their larve or grubs are as 
rapacious as they are themselves. They live in holes 
which they dig in the ground. When they are hungry 
they come to the mouth of their holes, and there keep 
watch, seizing the first insect that passes over the hole. 
Though these grubs are soft and white, they have pow- 
erful and well-armed jaws, with which they gratify their 
rapacity. 
425. In Figs. 193 and 194 (p. 248) you have two spe- 
cies of Caterpillar-hunters, so called from their habits. 
They are very handsome Beetles. The green Caterpil- 
lar-hunter, Fig. 193, is a great devourer of the Canker- 
worm. These Beetles run about in the grass after the 
worms, and go up the trunks of the trees to capture 
them as they come down. 
Figs. 191, 192.—Tiger Beetles 
