624 



AN INTRODUCTION TO ENTOMOLOGY 



This family is represented in this country by a single species, 



Tindgma obscuro- 



fasciella, the larva 

 of which is a leaf- 

 miner in Rosaceae. 



Family 

 CECOPHORID^ 



The head is usu- 

 ally smooth, with 

 appressed scales; 

 sometimes with 

 loose scales and 

 spreading side tufts. 

 The antennae usu- 

 The labial palpi are well- 



(After 



Fig. 765. — Wings of Tinag7na obscurofasciella. 

 Chambers.) 



ally have a comb of bristles on the scape. 



developed, generally curved upward ; the terminal segment is acute- 

 ly pointed. The maxillary palpi are vestigial. The wings are fairly 

 broad, sometimes ample 



Sc /? 



Fig. 766. — Wings of Depressaria herachana. 



(Fig. 766). The venation 

 is but little reduced. In 

 the fore wings veins R4 

 and R5 are stalked or co- 

 alesce throughout; veins 

 R2 and Cu2 arise well 

 back from the end of the 

 discal cell; and vein ist 

 A is preserved. In the 

 hind wings veins Rs and 

 Ml are well separated and 

 extend parallel. The 

 posterior tibiae are cloth- 

 ed with rough hairs 

 above. 



The larvae have sixteen legs ; they are often prettily marked with 

 dark tubercles on whitish or yellowish ground. The different species 

 vary in their habits; the majority of them either live in webbed- 

 together leaves or blossoms or feed in decayed wood; one species, 

 Endrosis lacteella, is a stored-food pest in California and in Europe. 



About one hundred species have been described from our fauna; 

 many of them are common. A generic revision of the American 

 species was published by Busck ('09 a). The following one is a well- 

 known pest. 



The parsnip webworm, Depressaria heraclidna. — The larvae of this 

 species web together and devour the unfolding blossom-heads of 

 parsnip, celery, and wild carrot. After the larvee have consumed the 

 flowers and unripe seeds and become nearly full-grown, they burrow 



