JOURNAL OF ENTOMOLOGY AND ZOOLOGY 103 



AUTOMERIS 10 



This species (Figs. 9, 10 and 17) has the distal margin of the 

 clypeus elevated into a prominent transverse ridge which projects 

 much farther cephalad than similar ridges in Citheronia regalis and 

 Dryocampa ruhicunda. The clypeo-labral suture is obsolete. The 

 invaginations for the anterior arms of the tentorium (Fig. 17, at) 

 are large and prominent and located along the lateral margins of 

 the labrum. The labrum (Fig. 17, lb) is quadrangular in outline, 

 much wider than long, the caudo-lateral angles slightly produced 

 and rounded. Laterad of the labrum are the functionless mandi- 

 bles (Fig. 17, md), the proximal suture distinct and the distal 

 margins heavily chitinized. The maxillae (Fig. 17, mx) are small, 

 somewhat oblong in outline and meet on the meson. They bear a 

 few long setas on the lateral margin, which extend the whole length 

 of the appendage. The labial palpi (Fig. 17, Ip) are very large 

 and prominent, three-segmented and thickly covered with setae. 



TeLEA POLYPHEMUS 



In Telea polypheinus (Figs. 14, 19 and 23) the mouth-parts are 

 very distinct and leave no doubt as to their homology. The cly- 

 peus (Fig. 14, cl) is heavily chitinized, strongly concave with the 

 labrum fitting into the concavity, with the corners of the clypeus 

 produced into a rounded angle on each side of it. The labrum 

 (Fig. 14, lb) is narrow, much wider than long with its distal margin 

 irregularly corrugated. The invaginations for the anterior arms 

 of the tentorium (Fig. 14, at) are very prominent and located 

 along the lateral margins of the clypeus. Laterad of the clypeus 

 and labrum on each side is a well developed mandible (Fig. 14, 

 md), each strongly chitinized and slightly toothed on the distal 

 margin and projecting slightly cephalad. The maxillae (Fig. 14, 

 mx) are fairly well developed, slightly longer than the head. Each 

 half has a prominent lateral projection near the base, but no trace 

 of a maxillary palpus could be found. The maxillas are slightly 

 separated at the proximal end but lie adjacent on the meson for 

 about three-fourths their length, tapering gradually to a point at 

 the distal end. The labial palpi (Fig. 14, Ip) are more than half 



