BY R. J. TILLY ARD. 



Table V. 

 Table of the Characters ok the Wings fob the Archetypes of the Complex 



and its Orders. ■ 



707 



o 



(1) 



(2) 



(3) 



(4) 

 (5) 



Character 



x 



'ft 



S 

 o 

 O 



O <£ 





Tracheation of pupal wings:— A, Holo- 

 tracheate. B, Merotracheate. 



Costal Veiulets:— A, complete series 

 B, reduced to three. C, reduced to 

 two. D, reduced to one only (km). 

 Basal forking of Sc:— A, Sc' complete. 

 B, Sc' reduced to a short vein. C. Sc 

 reduced to veinlet km. 



Distal forkings of Sc and El :— A, pre- 

 jsent. B, Absent. 



Manner of branching of Es : — A, dicho- 

 tomic. B, E24-3 pectinate. 



Number of branches of Es :— A, more 

 P) than four. B, four only. 



A 



A 



(?) 

 (8) 

 (9) 



Number of branches of Mi_4:— A , more 

 than four. B, four only. 



Cubito-median Y-vein:— A, complete. 

 B, reduced. 



Distal fusion of M4 with Cui a :— A, ab- 

 sent. B, partial. C, complete. 



Number of branches of Cu :— A, three, 

 ( 10 ) B, two. 



Anal Y-vein in f orewing : — A, absent 

 I 11 - B, present. 



Hind wing :— A, present. B, reduced to 

 ( 12 ) a halter. 



A 



A 



A 



A 



A 



A 



A 



A 



A 



(13) 



(14) 



Fusion of Cuo with 1A near base in ^ 

 hindwing: — A, absent. B, present. 



Marginal splitting or twigging of 

 veins :— A, absent. B, present. 



Cross-vein System :— A, quite unspec- 

 iaiised. B, C, D, E, F, consecutive 



(15) steps in arrangement and reduction, 

 ending with the most highly specialised 

 (Dipterous) system. 



Wing-trichiation ; macrotrichia :— 



A. unspecialised, on main veins and 



(16) archodictyon only. B, unspecialised, j A 

 but absent from membrane. C, mostly! 

 specialised as scales. 



B 

 A 



A 



A 



A 



A 



A 



A 



B 



A 



A 



B 



A 



1> o3 



5 ® 



r-H 



It 



[A] 

 B 



C 



A 



A 



A 



A 



A 



A 



A 



A 



A 



LA 



A 



[A] 

 A 



[B] 

 A 



ea 



t 



A B 



B 

 D 



o ce 

 "3 S 



•-H -P 



2 a 



2, * 



£.8 



on +5 

 a> 



Ph o3 



• rH 't-4 



d d 

 3 d 



B 

 A 

 A 

 A 



[A] 

 B 

 A 

 A 

 A 

 A 

 A 



,,~ Wing-trichiation ; microtrichia : — 

 *• ' A. normal. B, reduced. 



Wing-couplmg apparatus: — A, com 

 (18) plete. B, jugal bristles lost. C, jugal 

 'bristles and frenulum both lost. 



A 

 A 



A 



A 

 A 



A 



A 

 B 

 B 



[A] 

 A 

 B 

 A 

 A 



[A] 

 A 



B 



A 



B 



B 



B 



A 



B 



A 



B 



B B 



[A] 



A [ A ] 



F 



B 



C 



C 



A 



A 



B 



B 



A 



A 



A 

 B 

 A 

 B 

 A 



D 



C 



A 



A 



B 



B 



A 



C 



A 



B 



A 



B 



A 



E 



(Comparative Archaism (percentage of 10 q. 77.3 8ti-l 90-0 IjG-5 

 a rchaic characters) ; — 



A 

 C 



B 

 C 



35-3 48-5 



A 

 A 



C 



A 



B 



A 



B 



B 



A 



A 



A 



A 



A 



A 



B 



A 



A 



C 



A 



B 



A 



B 



B 



A 



A 



A 



A 



A 



B 



B 



B 

 B 



A 

 B 



44-6 73-9 



B 



A 

 B 



65-6 



