HOW TO KNOW THE IMMATURE INSECTS 



2b. Body with setae only 3 



3a. Prolegs rudimentary or wanting; crochets absent 4 



3b. Prolegs at least indicated by rudimentary crochets. 

 Fig. 413 12 



Fig. 413. 

 Crochets. 



4a. Front extending upwards to vertex; small species. 



Fig. 414 Family COLEOPHORIDAE 



This family contains about 1,000 describ- 

 ed species. The caterpillars are known as 

 leaf miners and case bearers. They feed 

 on leaves, flowers, fruits and seeds of var- 

 ious plants. Some systematists make this 

 group a subfamily of the TINEIDAE. 



Fig. 414. Coleophora 

 moiivorello Riley, 



4b. Front not extending to vertex. 

 Fig. 415 



Fig. 415. Cephalic as- 

 pect of head. 



5a. Head retracted; body often with spines or secondary hairs; primary 

 setae obsolete; body with obscure incisures and usually with con- 

 spicuous pits. Fig. 416 Family LIMACODIDAE 



About 850 species are described. The larvae 

 are slug-like and known as slug-caterpillars. The 

 body bears tubercles and stinging or poisonous 

 hairs. They feed on various plants. 



Fig. 416. Saddle-back- 

 ed slug caterpillar, Sa- 

 bine ttimulea Clemens. 



150 



