Lepidopteka of New York and Neighboring States 225 



Family 18. HELIOZELID^ 



(Elachistidaa, in part) 



Head smoothly scaled, broad, with small eyes, like the Elachistidse, 

 but with the palpi shorter and drooping. Antenna? short, with thick 

 joints, scape small, shaft with scaling as in Elachistidae. Tongue short, 

 with some scaling at base, the base covered over with a rough tuft of 

 scales between the palpi. Maxillary palpi absent. Hind tibiae with 

 stiff hair. Fore wings lanceolate, with four veins running to costa and 

 four to inner margin from the central cell; or venation more reduced, 

 without cell, R 5 and M x stalked, forking over the apex. Anal region 

 rather broad, the anals free and simple. Accessory cell never indi- 

 cated. Hind wing with R widely separated from Sc, the three medials 

 arising from it separately, or venation reduced, with a single free 

 medial. Cu separate; forked, or simple; anal region reduced. 



Larva forming a blotch mine, which is small, apparently indicating 

 that the larva feeds largely on sap in spite of its mandibles being of 

 the biting type; frass voluminous, sometimes nearly filling' the mine. 

 Larva at pupation cutting out an oval piece of the mined leaf, of 

 which it forms a lenticular case much like that of the Adelidaa. Legs 

 wanting ; front reaching vertex ( ? ) ; abdomen with setae iv and v 

 rather close together. Larva strongly flattened, as usual in leaf- 

 miners. Pupa with all appendages free and separate ; very lightly 

 chitinized, with spines on dorsum in obscure patches, hardly developed; 

 abdomen with third to seventh segments free, and eighth in male. No 

 maxillary palpi ;• labial palpi exposed ; antennae half as long as wings. 

 Labrum forming a well developed free lobe projecting over base of 

 labial palpi. 



In habits and pupa the family is distinctly primitive, but in larval 

 and imaginal structure, more specialized than Aphelosetia. 



Key to the genera 



1. Fore wing with lanceolate cell; hind wing lanceolate. 



2. R 2 present, arising well toward base; hind wing with three medials. 



(Fig. 134) Antispila. 



2. Rj absent; hind wing with a single medial, free from R. (Fig. 135). 



Heliozela. 

 1. Fore wing without cell; hind wing linear. (Fig. 133) Coptodisca. 



ANTISPILA Hiibner 



Fore wing (fig. 134) with R 3+4 and Rb sometimes stalked with M^ Hind wing 

 with Mj occasionally lost, R running to apex or just above. 



The species are dark brown, with more shining silvery face, the fore wing with 

 a fascia a third way out, and usually spots at two -thirds, the dorsal spot rather 

 nearer the base. The key may not apply invariably and the species are best indenti- 

 fied by breeding. 



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