380 ants' nests. 



Fig. 3. — A leaf of Eugenia jambolana, the cellular tissue of which, 

 between the two surfaces, has been eaten out by a worm, and 

 which has then been inhabited by Cardiocondyla wroughtonii, 

 Forel. Collected at Poonah, India, by Mr. Wroughton. 

 Two-thirds natural size. 



,, 4. — Pasteboard nest of Polyrhachis mayri^ Roger, half open, 

 showing the interior ; resting upon a leaf. From Ceylon ; 

 collected by Major Yerbury. Two-thirds natural size. 



,, 5. — A nest of Leptothorax acervoriim, Fab., excavated in the cork 

 layer of the bark of a fir ; spread out flat. Cross section 

 along the plane of the nest ; an opening at a. From Switzer- 

 land. Two-thirds natural size. 



,, 6. — Piece of a double nest of B'ormica fusca, L. , and ^olenopsis 

 fugax, Latr., collected by me near Zurich and preserved by 

 impregnation with shellac. Two-thirds natural size. W., The 

 plane of separation in the walls of the nest of Formica. 

 For., Excavations of F. fusca (recognisable by the coarser 

 grain and the greater width). S., Excavations of Solenopsis 

 fugax, made in the walls of the nest of Formica, recognisable 

 by the fine grain. S.o., Openings of the passages which 

 connect the larger chambers of Solenopsis. 



,, 7. — Web of Polyrhachis dives, Sm., from the East Indies. Micro- 

 scopic enlargement ; Hartnack, System IX. 



,, 8. — Nest of Polyrhachis spinigera, Mayr, from Poonah, India ; 

 from a sketch by Mr. R. C, Wroughton, divisional forest officer 

 at Poonah. The nest lies under a stone, and is excavated in 

 the ground, but is lined with a tine web, as Mr. Wroughton 

 has repeatedly verified. The figure represents an imaginary 

 cross section, somewhat smaller than the natural size. 

 St., The stone. Gr., The ground. W., The web. Op., The 

 opening for ingress and egress. Cell, The nest excavation. 



,, 9. — Fragment of the mound of a ground nest of Lasius niger, L., 

 from Zurich. We see how blades of grass and leaves are used 

 as pillars, arches, etc. , in the masonry. Two-thirds nat, size. 



,, 10. — Nest web of (Fcophylla smaragdina, Fabr. , received from 

 India, through Mr. Wroughton. We see from this fragment 

 how the leaves of a tree are united into a nest by means of 

 the web. W., the web. Two-thirds natural size. 



,, 11. — Flat surface of the head of a soldier of Colohopsis tnmcata. 

 Spin., from Vaux, Canton Waadt, Switzerland, seen from the 

 front, and magnified ten times. Mand., Upper jaw. 

 C, Cheeks. F., Forehead. 



,, 12. — Perpendicular cross section of the nest of Tapinoma errati- 

 cum, Latr., from Vaux, Canton Waadt, Switzerland. Pre- 

 served by me by means of impregnation with silica. Two- 

 thirds natural size. D, Temporary mound of earth. Int., 

 Interior of the nest, witli its natural framework of blades of 

 grass. Mhi. , Beginning of the underground excavated part 

 of the nest. Gr. , Cross section of the ground. 



