104 FAMILY v.— LOCUSTS. 



larger with each molt. The pupa is not very different from 

 the larva, only a little larger, but just as active and hungry 

 as it or the adult. 



Prof. Comstock gives the following classification : 

 A. Pulvilli present between the claws of the tarsi; prono- 

 tum never extending over the abdomen. 

 B. Prosternum unarmed. 



C. Vertex and front of head meeting at an acute 

 angle; vertex extending horizontally; front 



strongly receding 1 . Tryxalinae. 



CC. Head rounded at the union of the vertex and 

 front; front perpendicular, or nearh' so. 

 D. The terminal spine of the outer row of the 

 posterior tibiae wanting; second abdominal 



segment smooth 2. CEdipodinse. 



DD. The terminal spine of the outer row of the 

 posterior tibicE present; second abdominal 

 segment granulated on the sides 



3. Eretnobinae. 



BB. Prosternum tuberculate, or mucronate, or pro- 

 duced into a cone. 

 C. Head rounded at the union of the vertex and 

 front; front slightly receding; antennas filiform 



, 4. Acrid inse. 



CC. Vertex extending horizontally in front of the 

 eyes; front strongly receding; antennte more 



or less flattened 5. Opotnalinse. 



A A. No pulvilli between the claws of the tarsi; pronotum 



extending over the abdomen 6. Tettiginas. 



Prof Scudder, in his "Guide to Orthoptera," has only 

 four sub-families; he unites 3 with 2, and 5 with 1, 



Prof. Fernald gives the following simple table of the 

 sub-families found in New England: 



(Pronotum extending back to the tip of the abdo- 



-j j men Tettiginae. 



\ Pronotum not extending back to the tip of the abdo- 

 men 2. 



