PLATE XXVII. 



Fig. 1. Hemichroa aini, maxilla; la, labium; 

 1 b, 1 c, mandibles of larva. 



Fig. 2. Dineura virididorsata, maxilla ; 2 a b, 

 mandibles of larva. 



Fig. 3. Cladius padi, maxilla and labium; 3 a, 

 mandible ; 3 b, clypeus of larva. 



Fig. 4. Camponiscus ItwiMventriStVi&xill&i 4 a and 

 6, mandibles of larva. 



Fig. 5. Croesus septentrionalis, maxilla of larva. 



Fig. 6. Nematus ribesii, maxilla ; 6 a, mandible 

 of larva. 



Fig. 7. Nematus abdominalis, maxilla ; 7 a, la- 

 bium ; 7 b and c, mandibles of larva. 



Fig. 8. Lophyrus pini, maxilla ; 8 a and b, man- 

 dibles of larva. 



Fig. 9. PampJiilius flaviventris, cerci ; 9 a, an- 

 tenna ; 9 b, labium ; 9 c, maxilla of larva. 



Fig. 10. Euura pentandrce, structure of gall. 

 10 a c, woody parts of galls ; 10 d /, cellular 

 central portion. 



Fig. 11. Nematus cinerece, structure of gall, cen- 

 tral, 11 a, peripheral part of gall. 



