634 



AN INRTODUCTION TO ENTOMOLOGY 



Family HELIODINID^ 



The hind wings are narrow-lanceolate and pointed or linear and 

 much narrower than their fringe. The maxillary palpi are minute 

 and porrect. The labial palpi are very short and drooping.^ The 

 maxillse are strong. The tarsi are armed with more or less distinct 

 whorls of bristles; the tibiae are also often armed with stiff bristles. 

 Usually when at rest the imago holds the posterior pair of legs ele- 

 vated at the sides above the wings. 



The larvae are not well-known ; those that have been described are 

 of various habits. 



Cycloplasis panicijoliella. — The larva of this species mines in grass, 

 Panicum dandestinum. Its mine is at first a long thread-like line; 

 towards the latter part of the life of the larva it is enlarged into a 

 blotch. When the larva has reached maturity, it cuts a perfectly 

 circular disk from the upper cuticle of the leaf, folds it along its di- 

 ameter and unites the edges of the circumference, so as to make a 

 semicircle. When completed the larva, enclosed in its semicircular 

 cocoon, lets itself fall to the ground, where it attaches the cocoon to 

 some adjacent object. (Clemens). 



Schreckensteinia erythriella. — The larva feeds on sumac bobs. It 



is common; the body is uniform dark green, but the frass is scarlet. 



When full-grown it makes a lace-like cocoon on the outside of the bob. 



Schreckensteinia Jestaliella. — The larva of this species is an external 



feeder on Rubus; it is 

 spiny, and when full- 

 grown makes a lace- 

 like cocoon. 



Euclemensia hasset- 

 tella. — The larva is an 

 internal parasite in the 

 gall-like females of the 

 coccid genus Kermes. 

 The adult is a beauti- 

 ful greenish-black 

 moth, which has its 

 fore wings marked 



Fig. 776. — Euclemensia bassettella. 



with reddish orange (Fig. 776). 



The genus Euclemensia is placed in this family provisionally. 



Family ^GERIID^E 



The Clear-winged Moths 



The clear-winged moths constitute a very remarK- 

 able family, many of them resembling bees or wasps 

 in appearance more than they do ordinary moths, a 

 resemblance due to their clear wings and in some cases to their bright 

 colors (Fig. 777). There are a few moths in other families, as the 



