TABLE OF CONTENTS 



The setae 32 



The taxonomic value of setae 33 



A classification of setae 33 



(1) The clothing hairs 33 



(2) The glandular hairs 33 



(3) The sense-hairs 33 



d. The segmentation of the body 34 



The body-segments, somites or metameres 34 



The transverse conjunctivae 34 



e . The segmentation of the appendages 34 



/. The divisions of a body-segment 34 



The tergum, the pleura, and the sternum . 34 



The lateral conjunctivae 35 



The sclerites 35 



The sutures 35 



The median sutures 35 



The pilif erous tubercles of larvae 35 



The homologizing of sclerites 35 



g. The regions of the body -. . . . 36 



2. THE HEAD 



a. The corneas of the eyes 3 6 



The corneas of the compound eyes 36 



The corneas of the ocelli 3? 



b The areas of the surface of the head 3? 



The front 3? 



The clypeus 38 



The labrum 3 8 



The epicranium 3 8 



Thevertex 39 



The occiput 39 



Thegenae. 39 



The postgenae 39 



The gula 39 



The ocular sclerites , 39 



The antennal sclerites 39 



The trochantin of the mandible 4 



The maxillary pleurites 4 



The cervical sclerites 4 



c. The appendages of the head 4 



The antennae , 40 



The mouth-parts . 42 



The labrum 42 



The mandibles 42 



The maxillalac 42 



The maxillae 42 



The labium or second maxillae 45 



