APPENDIX 91 



bounds the meso-pleura ; (6) the Hypo-pleura is behind the 

 sterno-pleura and above the hind leg. 



B, IV, the Meta-Notum is the part of the thorax behind and be- 



neath B, I (6), the scutellum. 



C = Appendages of the thorax. 



C, I, Fore-legs, Mid-legs, and Hind- legs; every leg has nine 



joints [particularised illustrations on plate VII] ; (i) Coxae 

 are the joints attached to the body ; (2) Trpchanters very 

 small and inconspicuous; (3) Femora or Thighs; (4) Tibiae 

 or Shins; (5) First Tarsal Joint or Metatarsus; (6) Second 

 Tarsal Joint ; (7) Third ; (8) Fourth ; (9) Fifth Tarsal Joint ; 

 (10) the Knees are where the Thighs and Shins join; (II) 

 Claws, Foot-pads, and Empodium are appendages of the fifth 

 tarsal joint. 



C, II, Wings [sec Table of wing-cells and veins] ; the quarters 

 of the wing are the Fore and the Hind Basal Regions and 

 the Fore and the Hind Apical Regions. The Stigma is a 

 thickened portion of the wing at the middle of the fore 

 margin. 



C, III, the Halteres. 



C, IV, Squamae are scale-like appendages beneath the wings 



and above the halteres ; they seem to have some attachment 

 to the roots of the wings ; a small inner lobe is called the 

 antisquama, but it is a feature not of much use in classifying 

 and differentiating species. 



D = the Abdomen has numerous ringed sections ; in the Sub-order, 

 Cyclorrhapha in eight segments, but commonly divided into 

 four or five conspicuous segments and three or four more 

 smaller, less visible, and much modified in the sexual 

 terminal segments. 



D, I, the first abdominal segment is the Basal Segment. 



D, II, the last of those more visible is the Anal Segment or Anus. 

 D, III, the abdominal termination, see flatc VI, fig. 17. 



D, IV, the chief segments consist each of an Upper Plate joined 

 to an Under Plate by Membranous Sides, often concealed. 



D, V, Abdominal Bristles, sec plate VI, fig. 41. 



E = Bristles, Hairs, etc.; fine short furry hairs are called Pubes- 

 cence;" Hairs " are longer and stronger; Bristles are still 

 stronger ; but a very thick bristle is called a Spine, if on the 

 costa, and a Spur, if on the leg ; the larger bristles on B or 

 on D are called Macrochaetae. 



