270 



CLASSIFICATION 



[CH. 



Tribe 3. Palpopkurini. 



Wing vari-coloured, relatively broad. Anal loop elongated, with nearly 

 straight mid-rib. Sectors of arculus separate in forewing, slightly fused in 

 hindwing. Arc. between Ax^ and Ax z . Supplementary Bx present. Prothorax 

 with large lobe. Larva with head of somewhat triangular shape, the eyes 

 placed mid-laterally. 



Fig. 131. Wings of Libdlula fulva Miiller, 

 (Hw. 33 mm.) 'Original. 



Britain. 



Tribe 4. Brachydiplacini (fig. 132, also PL I, fig. 2). 



Sectors of arculus fused, but less so in fore than in hindwing. Arc. mostly 

 between Ax l and Ax z . Anal loop variable, often extending far beyond level 

 of triangle. M 2 , Us, and Rspl run parallel to one another up to the wing- 

 border; Rspl often broken. Mspl absent or rudimentary. Triangle of 

 hindwing often distad from arc. Supernumerary Bx and Cux often present. 

 Larva (Nannothemis) very hairy, with head rounded in front and behind, 

 eyes well-rounded and placed at antero-lateral angles. 



This tribe includes two series : 



Series 1. Brachydiplax-Series. Old World. 



Series 2. Uracis-Series. New World. 



Tribe 5. Sympetrini (fig. 133). 



Arculus and its sectors as in Tribe 4. Last Ax in forewing usually incom- 

 plete. Rspl well-formed, concave to Rs. Mspl usually distinct. No super- 

 numerary Bx or Cux (exc. Neurothemis). Hindwing with broad anal field; 



