72 



no epicranial suture present, and at dehiscence the eye-pieces are not 

 separated from the other face-parts, which indicates a high degree of 

 speciaHzation. The maxillary palpi are present, but not as well de- 

 veloped as in most pyralids. The labial palpi are represented by a 

 small polygonal area caudad of the lobes indicating the presence of 

 pilifers which meet on the meson. The fronto-clypeal suture is pres- 

 ent for about half the distance between the proximal ends of the an- 

 tennae and the meson and it dehisces for this distance at the emergence 

 of the imago. This family includes the single genus Atteva. The 

 pupae of this family are from 15-20 mm. in length. 



The following species was examined : 

 Atteva aiirca Fitch. 



Family Pyralididae 



This family (Figs. 74, 75, 76) includes a number of subfamilies, 

 of which only six are discussed here. The epicranial suture is present 

 in all of these except the Epipaschiinae and a few genera of Phycitinae 

 but the vertex is very short in all of the others, and often represented 

 by a small triangular area, adjacent to each antenna, which does not 

 reach to the meson. The antennae are long, at least seven eighths the 

 length of the wings and often much longer, and the distal ends never 

 meet on the meson. The labial palpi are visible only as small triangu- 

 lar or polygonal areas except in the Crambinae, which often show a 

 large portion between the halves of the maxillae. The maxillae are 

 always long except in the Gallerinae, usually reaching the caudal mar- 

 gin of the wings and sometimes extending beyond them. The maxil- 

 lary palpi are present in all subfamilies except the Epipaschiinae. 

 Each prothoracic leg is from one half to three fourths the length of 

 the wings and its femur is always exposed. The mesothoracic legs 

 generally extend to the caudal margin of the wings. The abdominal 

 segments never possess spines except in the Gallerinae but are smooth 

 or punctate. The spiracles are of different types, some being slightly 

 produced. The location of the mesothoracic spiracle is difficult to 

 determine in most species, there being no visible opening. The ap- 

 pendages are always firmly soldered to each other and the body wall. 

 The pupae vary in length from 8-20 mm. The following table will 

 serve to separate the subfamilies of Pyralididae : 



a. Maxillary palpi always present; epicranial suture usually distinct, 



at least for a part of its length. 



b. Maxillae never more than three fifths the length of the wings; 



dorsum of thorax and abdomen with a prominent median ridge 



and the segments covered with small spines Gallerinae. 



