Harvesting ants and trap-door spiders supp. Plate 14

Diagrams of the known types of trap-door nest.

Fig. A, nest of Atypus piceus (Sulz.) ; B, nest of cork type; B 1, the layers of silk with earth rims of which a cork door is composed ; C, single-door unbranched wafer type ; D, single-door branched wafer type; E double-door unbranched wafer type ; E 1, lower door of the same, of the natural size ; F, Hyeres double-door branched wafer type;

F 1, lower door of the same, of the natural size ; G, and G 1, double-door branched cavity wafer type. At G 1 the perfect type is seen, while at G, the descending cavity, the outlines of which are indicated by

dotted lines, has been filled up ; G 2, lower door of the same of the

natural size. (Figs. A, B, C, D, E, F, G and G 1, diagrammatic representations of nest on a reduced scale, Figs, B 1, E 1, F 1 and G 2, of the

natural size).