HOW TO KNOW THE IMMATURE INSECTS 

 13b. With prologs on 6th abdominal segment 14 



14a. Crochets of prologs ar- 

 ranged in a circle or el- 

 lipse (sometimes incom- 

 plete), or in transverse 

 bands. Fig. 426 15 



Fig. 426. Crochets: o, in transverse 

 bands; b, in incomplete circle; c, in 

 complete circle. 



14b. Crochets forming a single band (sometimes 

 with a few vestigial ones in addition). 

 Fig. 427 37 



Fig. 427. Crochets 

 in single band. 



15a. Prespiracular wart of prothorax with 2 setae. 



Fig. 428 FamUy PYRALIDIDAE 



This family is the sec- 

 ond largest of the order 

 and about 10,000 species 

 have been described. The 

 larvae are largely phyto- 

 phagous and some feed 

 upon dried vegetable mat- 

 ter. The meal moth, Pyr- 

 alis iarinalis (L.) feeds on 

 cereal and cereal pro- 

 ducts. The caterpillars of 

 the subfamily Schoeno- 

 biinae are borers in water 

 plants, while Nymphula 

 nymphaeta (L.) and N. 

 stagnate! Donovan are 

 semiaquatic species Uv- 

 ing in silk-lined sacs on 

 water plants in Europe. 



Fig. 428. a. Garden webworm, Loxostege siml- 

 laris (Guen.); b, beet webworn, Loxostege 

 sticticolis (L.); c, setal map of prothorax. 



15b. Prespiracular wort of prothorax with 3 setae. 

 Fig. 429 16 



154 



Fig. 429. Setal 

 map of pro- 

 thorax. 



