LEPIDOPTERA 709 



the hind wings in which veins Sc+Ri and Rg separate near the base 

 of the wing and are strongly divergent, resembling in this respect the 

 Lacosomidas. In the fore wings, vein Cu is apparently three-branched 

 and veins R5 and Mi are stalked and are well separated from vein R4. 

 The frenulum is present in our species. The moths rest with the fore 

 wings spread and the hind wings separated from them and partly 

 rolled about the body. 



Only five North American species of this family have been de- 

 scribed, but these represent four genera. Two of these genera, 

 Philagraula and Schidax, are each represented by a single species 

 found in Florida. 



Calltzzia amordta. — This is the best -known of our species; it is 

 found both in Canada and the United States. The moth expands 

 about 20 mm. It is pearly-ash colored. Both pairs of wings are 

 crossed near the middle of their length by two wavy dark lines, which 

 are connected by a bar of the same color near the inner margin of the 

 fore wings. On the fore w4ngs there is a third similar line near the 

 outer margin. The larva feeds on the leaves of Lonicera dioica. The 

 pupa state is passed at the surface of the ground. 



Calleddpteryx dryopterata. — This species is found in the Atlantic 

 States. The moth is pale ochreous in color, sometimes of a pale 

 wood-brown. Both pairs of wings are crossed by two transverse 

 dark lines. The wing expanse is 20 mm. The larva feeds on Vi- 

 burnum nudum. The pupa state is passed between the leaves. 



Family THYATIRID^ 

 The Thyatirids 



The family Thyatiridse includes moths of medium size with elon- 

 gated wings. The front wings are usually slightly widened at the 

 anal angle (Fig. 903), and in our more common species are conspicu- 

 ously marked with wavy or zigzag lines. The antennas are filiform 

 and more or less velvety or pubescent in the male, and the maxillae 

 are well developed. The moths fly by day, 

 and when at rest fold their wings roof -like 

 upon the abdomen. 



The venation of the wings is illustrated 

 by Figure 894. The important features to 

 be noted are the following: In the front 

 wing vein M2 arises midway between veins 



Ml and M3. In the hind wing vein Sc-f Ri ^ig,go2,.-Habrosynescripta. 

 and vein Rs are closely parallel for a space 



beyond the end of the discal cell and vein Mi is jointed to vein Rs 

 by a comparatively long cross-vein (Fig. 904, c.v.), so that the two 

 appear to separate before the end of the discal cell. In the males the 

 tip of the frenulum is knobbed. 



The larvae are naked, and live upon the leaves of shrubs and trees. 

 They often conceal themselves in a case, made by loosely fastening 

 together leaves, or by folding a single leaf. 



