171 Prae 



Postnasus. — That part of tlie face immediately 

 contiguous to the antennee, that lies behind the 

 nasus, when distinctly marked out. (L. fost, 

 and nasus, the nose.) 



Post-pectus. — The underside of the posterior 

 division of the alitruncus, which is divided into 

 the mesostethium, parapleur?e, metasternum, 

 post-furca, and the opercula, (L. post, and 

 pectus, the breast.) 



Post-pharyngeal glands. — Two groups of finger- 

 shaped salivary glands situated immediately 

 behind the pharynx, and opening into the 

 alimentary duct by a pair of tubular orifices. 

 (L. post, pharynx, and cjlans, a gland.) 



Postretinal fibres.— The fibres arising from the 

 facets of the compound eye and which pass into 

 the ganglionic plate, which is united within by 

 the chiasmatic fibres of the external medullary 

 mass. (L. post, retina, and fibra, a fibre.) 



Post-scutellum. — The fourth section of the upper 

 surface of the segment. (L. post, and scutum, 

 a shield, plate.) 



Post-sternellum.^ — The fourth section of the lower 

 surface of the segment. (L. post, and sternum.) 



Praj. — [See Pre.] 



Praepleura, Pleura, Pleurella, Post pleurella.— The 



first, second, third, and fourth sections respec- 

 tively of the pleura. These portions are divided 

 by sutural lines, and are rarely distinguishable 

 in more than one segment of an insect. (L. 

 pre, and Gr. pleura, side.) 



