io 6 EXPLANATION OF TERMS 



Posterior wings: = secondaries ; q. v. 



Postero-dorsal: Diptera; applied to leg bristles at the meeting of the dorsal 



and posterior face. 

 Postero-ventral: Diptera; applied to leg bristles at the meeting of the ventral 



and posterior face. 

 Postfurca: an internal process of metasternum to which the muscles of hind 



legs are attached. 

 Post-gena: the sclerite below occiput and behind gena in some Orthoptcra. 

 Post-gula: is situated at the extreme base of the underside of the head in 



Dermoptera. 

 Post-humeral bristles: in Diptera, are usually two, inserted above the dorso- 



pleural suture between the humeral callus and root of wing, on the bottom 



of the presutural depression. 

 Postical vein: in Diptera, = 5th longitudinal (Meig.) ; = media 3 (Comst.). 

 Posticus: hinder. 

 Post-media: Ephemerida ; an apparently distinct vein between media and 



cubitus (Comst.). 

 Post-medial line: in Lepidoptera, = t. p. line; q. v. 



Post-median: Diptera; those leg bristles situated above or behind the middle. 

 Post-nodal cross-veins: in Odonata, the transverse veins between costa and 



radius 1, and radius 1 and media 1, from nodus to stigma, separating the 



post-nodal cells or spaces : = post-cubital cross-veins. 

 Post-nodal costal spaces: in Odonata, the cells below costal margin from 



nodus to stigma. 

 Post-nodal radial spaces: in Odonata, the cells between radius 1 and media 1, 



from nodus to outer margin. 

 Post-nodal sector: in Odonata, a longitudinal vein lying between media 1 and 



media 2 (Comst.) : = ultra-nodal sector. 

 Post-oral: behind the mouth; those segments bearing mouth structures. 

 Post-pectus: the under surface of the meta-thorax. 

 Post-petiole: in llymenoptera, that part of abdomen behind petiole. 

 Post-retinal: the fibres arising from the facets of the compound eye and ex- 

 tending into the ganglionic plate. 

 Post-SCUtellum: the fourth and posterior sclerite of the dorsum of the 



thoracic rings. 

 Post-scutum: in Trichoptera, the little plate behind the scutellum of meso- 



thorax : == post-scutellum. 

 Poststigmatal: that portion of the marginal cell beyond the stigma in bees: 



= 2d radial 1 (Comst.). 

 Post-stigmatal primary tubercle: on thoracic segment of caterpillars; sub- 

 primary, stigmatal, posterior ; it is III of the thorax and not present on 



abdomen (Dyar). 

 Post-subterminal: following the s. t. line in Lepidoptera. 

 Post-sutural bristles: in Diptera, dorsal bristles behind transverse suture. 

 Post-terga: applied to the posterior scutes of the segments of Coleopterous 



larva. 

 Post-triangular cells: = discoidal areolets ; q. v. 



