The Leucopsis' egg is not even laid upon the Mason-bee's larva; it is hung by its bent pedicle to the fibrous wall of the cocoon. When I go to work very delicately, so as not to disturb the arrangement in knocking the nest off its support, and then extract and open the cocoon, I see the egg swinging from the silken vault. But it takes very little to make it fall. And so, most often, even though it be merely the effect of the shock sustained when the nest is removed from its pebble, I find the egg detached from its suspension-point and lying beside the larva, to which it never adheres in any circumstances. The Leucopsis' probe does not penetrate beyond the cocoon traversed; and the egg remains fastened to the ceiling, in the crook of some silky thread, by means of its hooked pedicle. INDEX. Amazon Ant (see Red Ant). Ammophila. Ammophila hirsuta (see Hairy Ammophila). Ant (see also Black Ant, Red Ant). Anthidium (see also Cotton-bee, Diadem Anthidium). Anthophora (see also Hairy-footed Anthophora). Anthrax (see also Anthrax sinuata). Anthrax sinuata. Anthrenus. Ape. Aphis. Baboon. Bastien. Bee. Bembex (see also Bembex rostrata). Bembex rostrata. Black Ant. Blanchard, Emile. Blue Osmia. Bombylius. Bumble-bee. Butterfly. Cabbage-caterpillar. Cagliostro. Carrier-pigeon. Castelnau de la Porte, Francis Comte de. Cat. Caterpillar (see also Cabbage-caterpillar, Grey Worm, Processionary Caterpillar, Spurge-caterpillar). Cerceris (see also Great Cerceris). Cerceris tuberculata (see Great Cerceris). Cetonia. Chalcis. Chalicodoma (see Mason-bee). Chalicodoma muraria (see Mason-bee of the Walls). Chalicodoma pyrenaica, C. pyrrhopeza, C. rufitarsis, C. sicula (see Mason-bee of the Sheds). Chalicodoma rufescens (see Mason-bee of the Shrubs). Chat. Chrysis (see also Parnopes carnea, Stilbum calens). Clerus. Coelyoxis. Common Lizard. Common Wasp. Cornelius Nepos. Cotton-bee. Cricket. Crioceris. Crocisa. Darwin, Charles Robert. Darwin, Erasmus. Diadem Anthidium. Dioxys. Dioxys cincta (see Dioxys). Dog. Dufour, Jean Marie Leon. Duhamel du Monceau, Henri Louis. Duruy, Jean Victor. Euclid. Eumenes Amadei. Eyed Lizard. Fabre, Mlle. Aglae, the author's daughter. Fabre, Mlle. Antonia, the author's daughter. Fabre, Mlle. Claire, the author's daughter. Fabre, Mlle. Lucie, the author's granddaughter. Favier, the author's factotum. Fly. Franklin, Benjamin. Gad-fly. Gnat. Golden Wasp (see Chrysis). Gold-fish. Grasshopper (see Green Grasshopper). Great Cerceris. Green Grasshopper. Grey Lizard. Grey Worm. Hairy Ammophila. Hairy-footed Anthophora. Halictus. Hive-bee. Huber, Francois. Ichneumon-fly. Lacordaire, Jean Theodore. Lamb. Lark. Latreille's Osmia. Leaf-cutter (see Megachile). Leucopsis. Leucopsis dorsigera. Leucopsis gigas (see Leucopsis). Le Vaillant, Francois. Lion. Lizard (see Common Lizard, Eyed Lizard, Grey Lizard). Locust. Loriol, Dr. Loriol, Mme.