PLATE XXXI 



I, Caudal view of head; 2, lateral view 



3, Caudal view of head of Enchetiopa binotata Say; 4, of Tragopa tripartita Fairmaire 



5, Clypeus in Telarnona ampelopsidis Harris; 6, in Enchophyllum maculatum Walker; 7, 



in CampTjlenchia latipes Say; 8, in Centrodontus atlas Coding; 9, in Carynola mera Say; 10, in 



Enchenopa binotata Say 



II, Frontal outline of head of Ceresa bubalus Fabricius; 12, of Ceresa taurina Fitch; 13, of 

 Ceresa constans Walker; 14, of Ceresa Palmeri Van Duzee; 15, of Ceresa borealis Fairmaire; 

 16, of Stictocephala lutea Walker; 17, of Stictocephala diminuta Van Duzee; 18, of <S7ic- 

 tocephala substriata Walker; 19, of Stictocephala inermis Fabricius; 20, of Stictocephala pacifica 

 Van Duzee 



21, Vertex and clypeus of Spongophorus guerini Fairmaire; 22, of Hypsophora insignis 

 Buckton; 23, of Xiphistes furcicornis Germar 



24, Vestigial segment in head of Ceresa taurina Fitch; 25, in head of nymph of Oxyrhachis 

 tarandus Fabricius; 26, in head of nymph of Heranice miltoglypta Fairmaire; 27, in head of 

 Membracis tectigera Olivier 



302 



