TABLE OF CONTENTS 



The setae 32 



The taxonomic value of setae 33 



A classification of seta? 33 



(i) 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 mctameres 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 conjunctivas 35 



The sclerites 35 



The sutures 35 



The median sutures 35 



The piliferous tubercles of larvae 35 



The homologizing of sclerites 35 



g. The regions of the body 36 



2. THE HEAD 



The corneas of the eyes 36 



The corneas of the compound eyes 36 



The corneas of the ocelli 37 



The areas of the surface of the head 37 



The front 37 



The clypeus 38 



The labrum 38 



The epicranium 38 



The vertex 39 



The occiput 39 



The genas 39 



The postgenas 39 



The gula 39 



The ocular sclerites 39 



The antennal sclerites 39 



The trochantin of the mandible 40 



The maxillary pleurites 40 



The cervical sclerites 40 



The appendages of the head 40 



The antennas 40 



The mouth-parts 42 



The labrum 42 



The mandibles 42 



The maxillulas 42 



The maxillae 42 



The labium or second maxillae 45 



