EXPLANATION OF THE PLATES. 



Fig. 



16. Wing of (Ecodoma cephalotes, J . 



17. Profile of (Ecodoma aspersa, J . 



18. hystrix, . 



19. sexdentata, $ . 



20. Abdomen of (Ecodoma Mexicana, J . 



21. cephalotes, J. 



22. abdominalisy . 



23. Head of (Ecodoma cephalotes, worker major. 



24. Icevigata, worker minor. 



25. Head and thorax of Pseudomyrma cephalica, 2 . 



26. Abdomen of Pseudomyrma cephalica, 2 - 



PLATE XI. 



1. Cryptocerus discocephalus, <$ . 



2. worker major. 



3. worker minor. 



4. Mandible of Cryptocerus atratus, J . 



5. Labial palpi of Cryptocerus atratus, J . 



6. Maxillary palpus of Cryptocerus atratus, J . 



7. Cryptocerus serraticeps, J . 



8. minutus, worker minor. 



9. pusillus, 5 



10. Cataidacus parallelus, $. 



11. Head of Cataulacus Taprobance, . 



12. Thorax of Cataulacus Taprobance, $ . 



PLATE XII. 



1. Head of Meranoplus, $ . 



2. Cataidacus, $ . 



3. Cryptocerus minutus, worker major. 



4. angulatuSj ^ 



5. Meranoplus petiolatus, J . 



6. Antennae of Meranoplus petiolatus, 2 . 



7. Meranoplus gradUs, $ . 



8. diffbrmis, . 



9. Antennae of Meranoplus difformis. 



10. Cataulacus horridus. 



11. Meranoplus bicolor, 



12. Cryptocerus obtusus, 5 



PLATE XIII. 



1. Polyrhachis bispinosus, $ . 



2. Scale of the petiole, viewed in front. 



3. Lateral view of the same. 



