PLATE UI— concluded. 



M. ap. is the acetabulum into which a condyle of the mandible fits, 

 and which is the beginning of a suture which divides the pg. into two 

 parts, the episternum and the epimeron. "The mandible is the basal 

 segment (coxa) of an appendage, which articulates with the ventral ends 

 of two sclerites (episternum and epimeron), between which there is a 

 lateral apodeme." 



Fig. 32. — The Tentorium of a Cockroach. Dorsal Aspect. 

 Pt. — Posterior arm of tentorium. 

 Bt. — Body of tentorium. 

 Fp. — Frontal plate of tentorium. 

 Dt. — Dorsal arm of tentorium. 

 T. oe. — Tendons of oesophageal muscles. 

 At. — Anterior arm of tentorium. 

 C. — Clypeus. 

 L. — Labrum. 



Fig. 3.3. — Head of Melanoplus, Caudal Aspect. 

 V. — Vertex. 

 O. — Occiput. 

 Pg. — Postgenje. 



Pt. — Posterior arm of tentorium. 

 Bt. — Body of tentorium. 

 Mx. — Maxilte. 

 2nd Mx. — Second maxillae or labium. 



Fig. 34. — Tentorium of Melanoplus, Cephalic Aspect. 

 The distal ends of the dorsal arms detached. 

 O. — Occiput. 

 Pg.- — Postgenje. 



Pt. — Posterior arms of tentorium. 

 Bt. — Body of tentorium. 

 At. — Anterior arms of tentorium. 

 C. — Clypeus. 

 L. — Labrum. 



