PSTCHE 1915 



Vol. 22, Plate 1. 



Mandibles of Various Locusts. 



Fig. 1, Hippiscus tuberculatus; fig. 2, Cockroach; fig. 3a, Melanoplus femur- 

 rubrum; fig. 3b, Schistocerca alutacea; fig. 4a, Schistocerca americana, mandibles 

 closed; fig. 4b, same, mandibles separated; fig. 4c, same, left mandible turned over 

 to show grinding surface; fig. 5a, Syrbula sp.; fig. 5b, Melanoplus differcntialiti; 

 fig. 5c, Disesteira Carolina; fig. 5d, Encoptolophus sordidus; fig. 5e, Melanoplus 

 differentialis 



