xxx LIST OF ILLUSTRATIONS 



FIG. r ' A ' ;E 



513. Podura 616 



514. Locusta . 617 



515. An Embiid 617 



516. Psocus fasciatus 617 



517. Mallophaga . 617 



518. Ephemera . 618 



519. Aphis rosae. . 618 



520. Qcacla . . .619 



521. Culex and larva 619 



522. Gastrophilus equi . 619 



523. Pieris . . 620 



524. Crioceris . 620 



525. Panorpa communis . .621 



526. Section of integument of Insect . 622 



527. Mouth-parts of Honey-bee 622 



528. Diptera . 623 



529. Lepidoptera . 624 



530. Digestive organs of Beetle . 626 



531. Nervous, tracheal, and digestive systems of the Honey-bee . . 626 



532. Tracheal gills of Ephemericl . 628 



533. Heart of Cockchafer . .... .628 



534. Nervous system of Diptera . . . 629 



535. Ocellus of Dytiscus larva . . . 630 



536. Sexual apparatus of Honey-bee . . 631 



537. Segmentation of ovum of Insect . . . . . 633 



538. Germinal layers and amnion of Insect 633 



539. Development of Hydrophilus . 634 



540. 635 



541. Apis mellirica, queen, worker, and drone . . 636 



542. Formica rufa ... 636 



543. Euscorpio . . . .639 



544. Ventral surface of cephalothorax and pre-abdomen of Scorpion . 639 



545. Endosternite of Scorpion . 640 



646. Scorpion, anatomy, lateral view . 641 



547. dorsal . . . 642 



548. ,, development .......... 643 



549. Embryo of Scorpion .......... 644 



550. Chelifer bravaisii 646 



551. Phrynus .... ........ 647 



552. Galeodes dastuguei ........... 647 



553. Epeira diadema . 648 



554. ,, ,, cheliceraj and pedipalpi of female . . . 648 



555. ,, ,, pedipalp of male 648 



556. Sarcoptes scabisei . 649 



557. Trombidium fuliginosum . 649 



558. Limulus . . 650 



559. ,, ventral view . ..... 651 



560. Eurypterus fischeri . . . 652 



