126 THOMAS SAY FOUNDATION 
PLATE 1 
FIGuRES 1-16 
1— 5 Pteronarcys dorsata Say 
1. Labrum 
2. and 3. Mandibles 
4, Labium 
5. Maxillary palpus 
6-10 Pteronarcys californica Newpt. 
11-16 Pteronarcys proteus Newm. 
15. Front leg 
In the above species, note the rather short, blunt teeth and the 
large molar of the mandibles; the four-lobed ligula; the large 
galea, and the flattened tridentate lacinia of the maxilla. 
