Supplement to Harvesting Ants and Trap-door Spiders. J. Traherne Moggridge Transcriber's Note: Text emphasis denoted as _Italic_ and =Bold=. Whole numbers and fractional parts as 123-4/5. SUPPLEMENT TO HARVESTING ANTS AND TRAP-DOOR SPIDERS. SUPPLEMENT TO HARVESTING ANTS AND TRAP-DOOR SPIDERS. BY J. TRAHERNE MOGGRIDGE, F.L.S., F.Z.S. _WITH SPECIFIC DESCRIPTIONS OF THE SPIDERS,_ BY THE REV. O. PICKARD-CAMBRIDGE. [Illustration] LONDON: L. REEVE & CO., 5, HENRIETTA STREET, COVENT GARDEN. 1874. LONDON: SAVILL, EDWARDS AND CO., PRINTERS, CHANDOS STREET, COVENT GARDEN. CONTENTS. PAGE SUPPLEMENT TO HARVESTING ANTS 157 SUPPLEMENT TO TRAP-DOOR SPIDERS 180 SPECIFIC DESCRIPTIONS OF SPIDERS 254 EXPLANATION OF PLATES. Plate XIII., p. 183, fig. A.--Silk lining of tube of _Atypus piceus_ (Sulz.), taken at Troyes in Champagne, and communicated to me by M. E. Simon; B, drawing of portion of nest of _Cyrtauchenius elongatus_ (Sim.) made after the description of the discoverer, and subject to his (M. E. Simon's) corrections. This is the only illustration in the present work not taken from an actual specimen. These figures are of the natural size. Plate XIV., p. 193.--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, Hyères 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).