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 conjunctivas 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 conjunctiva? 35 



The sclerites 35 



The sutures : 35 



The median sutures 35 



The piliferous tubercles of larva? 35 



The homologizing of sclerites 35 



g. The regions of the body 36 



2. THE HEAD 



a. The corneas of the eyes 36 



The corneas of the compound eyes 36 



The corneas of the ocelli 37 



b. The areas of the surface of the head 37 



The front 37 



The clypeus 38 



Thelabrum 38 



The epicranium 38 



The vertex 39 



The occiput 39 



The genae 39 



The postgenae 39 



The gula 39 



The ocular sclerites 39 



The antennal sclerites 39 



The trochantin of the mandible 40 



The maxillary pleurites 4 



The cervical sclerites 4 



c. The appendages of the head 4 



The antennae 4 



The mouth-parts 4 2 



The labrum 4 2 



The mandibles 4 2 



_ The maxillulae 4 2 



The maxillae 4 2 



The labium or second maxilla: . . 45 



