Transcriber's Note: Emphasis denoted as _Italics_. Whole and fractional parts of numbers as 123-4/5. _BY THE SAME AUTHOR._ Royal 8vo. In 4 parts, each, with 25 Coloured Plates, 15_s._, or complete in one vol. 63_s._ CONTRIBUTIONS TO THE FLORA OF MENTONE, AND TO A WINTER FLORA OF THE RIVIERA, _Including the Coast from Marseilles to Genoa_. BY J. TRAHERNE MOGGRIDGE, F.L.S. L. REEVE & CO., 5, HENRIETTA STREET, COVENT GARDEN. HARVESTING ANTS AND TRAP-DOOR SPIDERS. HARVESTING ANTS AND TRAP-DOOR SPIDERS. NOTES AND OBSERVATIONS ON THEIR Habits and Dwellings. BY J. TRAHERNE MOGGRIDGE, F.L.S. [Illustration] LONDON: L. REEVE & CO., 5, HENRIETTA STREET, COVENT GARDEN. 1873. LONDON: SAVILL, EDWARDS AND CO., PRINTERS, CHANDOS STREET, COVENT GARDEN. CONTENTS. PART I. PAGE HARVESTING ANTS 1 PART II. TRAP-DOOR SPIDERS 71 EXPLANATION OF PLATES. PART I.--HARVESTING ANTS. Plate I., p. 21, fig. A.--View of the entrance to a nest of _Atta barbara_, showing part of a train of ants bearing seeds, the conical mound of refuse thrown out, and some seedlings, which have sprung up from seeds accidentally dropped by the ants; B, one of the larger workers of this species, of the natural size, and B 1, its abdomen and pedicle, with two nodes, magnified; C*, one of the smaller workers, of the natural size; C, a male, of the natural size; D, a female, of the natural size; D 1, wing of the same, magnified; D 2, mouth organs of the same, magnified, with the mandibles removed, the two outer pieces being the maxillæ and their palpi, and the lozenge-shaped piece the labium, from the upper part of which the labial palpi spring, while behind the labium is the true tongue; D 3, one of the mandibles, magnified; E, a larva, of the natural size, and E 1, the same, magnified. Plate II., p. 22, fig. A.--A trowel containing earth, in which a granary full of seeds is lying almost undisturbed, of the natural size; B, the crater-like entrances found at the mouths of the nests of _Atta structor_, reduced to one-half the natural size.