BENEFICIAL INSECTS, PREDACEOUS AND PARASITIC 9 



come forth in the spring and lay their eggs wherever the young 

 will be able to find food when they hatch. When the larva 

 has satisfied its ravenous appetite and become full grown it 

 fastens itself to a leaf or twig, seemingly by its tail, if such 



FIG. 1. The nine-spotted ladybird (Coccinella novemnotata) , and its larva; 

 enlarged. (After Chittenden, U. S. Dept. Agr.) 



a term might be allowed, transforms to the pupa, and in a week 

 or ten days the adult beetle emerges from the pupal skin. This 

 life-cycle is repeated several times during the summer season, 

 before the fall brood enters winter quarters. 



Another very common form among plant-lice on garden truck 

 is the little Adalia bipundata, or Two-spotted Ladybird. It is 



FIG. 2. The two-spotted ladybird (Adalia bipunctata): a, larva; 6, mouth- 

 parts of same; c, claw of same; d, pupa; e, adult; /, antenna of same; 

 all enlarged. (After Marlatt, U. S. Dept. Agr.) 



slightly smaller than the preceding, and with only one black spot 

 on each wing-cover (Fig. 2). 



