xiv BRITISH ANTS. 



PIG. PAGE 



7. Thorax of Formica pratensis $ ....... 8 



8. Fore-wing of Formica (rufa L.) ..... .10 



9. Fore-wing of Ponera (coarctata Latr.) . . . . . .11 



10. Fore- wing of Myrmecina (graminicola Latr.) . . . .11 



11. Fore- wing of Formicoxenus (nitidulus Nyl.) . . . .11 



12. Fore- wing of Anergates (atratulus Schenck) . . . . .11 



13. Fore-wing of Monomorium (pharaonis L.) . . . . .11 



14. Fore- wing of Solenopsis (fugax Latr.) . . . . . .11 



15. Fore- wing of Myrmica (ruginodis Nyl.) .... .11 



16. Fore- wing of Stenamma (westwoodi West.) . . . .11 



17. Fore- wing of Leptothorax (interruptus Schenok) . . . . 11 



18. Fore-wing of Tetramorium (caespitum L.) . . . . .11 



19. Fore- wing of Tapinoma (erraticum Latr.) . . . . .11 



20. Fore- wing of Donisthorpea (aliena Forst.) . . ... . 11 



21. Abdomen of Ponera coarctata $ .12 



22. Abdomen of Myrmica ruginodis . . . . . . .12 



23. Abdomen of Tapinoma erraticum $ . . . ... . 12 



24. Abdomen of Formica pratensis . . . . . .13 



25. Abdomen of Formica pratensis <$ . . . * .13 



26. (J genitalia of Formica rufibarbis (dorsal) . . . .14 



27. c? genitalia of Formica rufibarbis (ventral) . . . .. . 14 



28. Stipes, volsella, and sagitta of Formica rufibarbis (dissected out) . 15 



29. $ genitalia of Ponera punctatissima . . . . . . .15 



30. $ genitalia of Myrmica scabrinodis . . . .- . . . 15 



31. Internal structure of Myrmica rubra ^ . . . . .16 



32. Gizzard of Formica pratensis $ 17 



33. Gizzard of Tapinoma erraticum Q (anterior view) . . . .18 



34. Poison apparatus of Formica rufibarbis ty . , . . . . 19 



35. Poison apparatus of Bothriomyrmex meridionalis $ . . .20 



36. Poison apparatus of Myrmica laevinodis Q ..... 20 



37. Repugnatorial glands of Tapinoma erraticum ^ . . . .21 



38. Sketch to show position of repugnatorial glands of Tapinoma erra- 



ticum ^ ........... 22 



39. Reproductive organs of Myrmica rubra ? 23 



40. Ovaries of pseudogyne of Formica rufa ...... 23 



41. Reproductive organs of Myrmica rubra <$ ..... 24 



42. Brain, etc., of Donisthorpea fuliginosa $ 25 



43. Head of larva of Myrmica scabrinodis 31 



44. Hairs on Myrmica larva 32 



45. Ergatandromorph of Myrmica scabrinodis 36 



46. Ergatandromorph of Formica sanguinea .37 



47. Mermithogyne of Donisthorpea flava 38 



48. Pseudogyne of Formica sanguinea 39 



49. Pseudogyne of Formica rufa var. rufo-pratensis . . . .40 



50. Pterergate of Myrmica scabrinodis 41 



51. Stand for " Lubbock " nests 58 



52. Four-chambered " Janet " plaster nest ...... 59 



53. " Santschi " observation nests 61 



54. " Crawley-Lubbock " observation nest 61 



