OBSERVATIONS ON SOME SOUTH AFRICAN TERMITES. 499 



PLATE XXVIII. 



Termes natalensis Hav. 



Fig. 1. — X 3TJ. Large mound, lateral galleries cut through by trench. 



Fig. 2. — x xV- Vertical section of large and unusually hollowed 

 mound, Pretoria. (Photo by F. Thomsen.) 



Figs. 3 and 4. — Nat, size. Small queen-cell, without brackets, and 

 with large entrances. 



Figs. 5 and 6. — x \. Large queen-cell ; fig. 5, exterior view ; fig. 6, 

 vertical long-section. Cavity 125 mm. long and 18 mm. high. 



Figs. 7 and 8. — x i. A large queen-cell ; fig. 7, exterior view ; fig. 

 8, vertical cross-section. Cavity 90 mm. broad and 18 mm. high. 



Figs. 9-12. — x f. Coronetted fungus-gardens; fig. 9, tall form 

 (50 mm. high, 80 mm. across) ; fig. 10, short form (25 mm. high, 95 mm. 

 across) ; fig. 11 short form from above ; fig. 12, short form from below. 



PLATE XXIX. 

 Termes latericius Haviland. 



Fig. 1. — Vertical section of nest-site (diagrammatic) showing 

 (a, b, c, d) various types of air-pits, (e, e) supplementary fungus-garden 

 cavities ; and general relation of hive-cavity to air-pits. 



Fig. 2. — x i. Vei'tical section of roofed air-pit (sketched from 

 nature, Pretoria). 



Fig. 3. — X f . Vertical cross-section of a main-runway. 



Fig. 4. — x f. Vertical section of a main-runway, showing inclined 

 vertical shaft to soil-surface. 



Fig. 5. — x 1. Vertical section of small granary-cavity, with simple 

 horizontal diaphragm. 



Fig. 6.— X |. Vertical section of small granary-cavity, with simple 

 sub-horizontal diaphragm, showing : a, single entrance ; b, a very small 

 fungus-garden ; c, a small collection of fresh grass-lengths deposited on 

 floor of upper chamber. 



Fig. 7. — x i. Vertical section of medium large granary-cavity, 

 showing conspicuous upper cavity, complex interior of lower region, 

 and grass seeds embedded in surrounding eai'th (from nature, Pretoria). 



Fig. 8. — x i. Exit galleries made for imagos ; a, front view of van- 

 tage ; b, vertical longitudinal section ; c, vertical section showing con- 

 dition preceding and following flight ; d, cross-section of gallery two 

 inches from surface. 



