504 



ANT^l NESTS. 



Fig. 3. A leaf of Eugenia jamholana, the cellular tissue of which, between the two 

 surfaces, has been eaten out Ly a worm, and which has then been inhab- 

 ited by Cardiocondyla wroiighkmii P\)rel. Collected at Poonah, India 

 by Mr Wroughton. Two-thirds natural size. ' ' 



Fig. 4. Pasteboard nest of PohjrhacUs mayri Roger, half open, showing the interior- 

 resting upou a leaf. From Ceylon; collected by Major Yerbury. Two- 

 thirds natural size. 

 Fig. 5. A nest of Leptothoiax acervorum Fab., excavated in the cork layer of the bark 

 cf a fir; spread out flat. Cross section aloug the plane of the nest- an 

 opening at a. From Switzerland. Two-thirds natural size. 

 Fig. 6. Piece of a double nest of Formica fusca L. and Solenoims fugax Lath., col- 

 lected 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 Formica funca (recognizable by the coarser graiu and 



the greater width). 

 S. Excavations of Solenopsisfugax, made in the walls of tlie nest of Formica 

 recognizable by the fine graiu. ' 



S.o. Openings of the passages which connect the larger chambers of 

 Soloiopsis. 

 Fig. 7. Web of Polyrhachis dices Sm., from the East Indies. Mi.roscopic enlaro-em<'nt • 

 Hartnack, System IX. " ' 



Fig. 8. Nest of Folyrhachis ^pim{/era Mayr, from Poouah, India; from a sketch by 

 Mr. K. C. Wroughton, divisional forest officer at Poonah. The nest lies 

 under a stone and is excavated in the ground, but is lined with a fine 

 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. 

 Fig. 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 ])i]lar8, arches, etc., 

 in the masonry. Two-thirds natural size. 

 Fig. 10. Nest web of (Ecophylla smaragdina Fabk., 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. 

 Fig. 11. Flat surface of the head of a soldier of Colobopsis truncala Spin., from 

 Vaux, Canton Waadt, Switzerland, seen from the iiont, and magnified 

 ten times. 

 Man. Upper jaw, 

 C. Cheeks. 

 F. Forehead. 

 Fig. 12. Perpendicular cross section of the nest of Tapinoma erraticum Latr., from 

 Vaux, Canton Waadt, Switzerland. Preserved by me by means of 

 impregnation with silica. Two-thirds natural size. 

 I). Temporary mouud of earth. 



Int. Interior of the nest, with its natural framework of blades of grass. 

 Min Beginning of the underground excavated part of the nest. 

 Gr. Cross section of the ground. 

 Fig. 13, Cross section of a fragment of a nest of Colohopsi., iruncoia Spinola, exca- 

 vated in the wood of a dead, but extremely hard, pear tree; Found by 

 me at Vaux, Canton Waadt, Switzerland. I'our-thinls natural size. 

 Ch. Excavalious of the nest in the wood. 



