340 



BRITISH SPECIES 



[CH. 



interrupted dorsally. App. sup. short, black, divergent, pointed ; inf. trun- 

 cated. $ abd 58 62, hw 46 50, pt 5. Closely resembles <J- 

 Fairly common. June Aug. 



Subfamily Aeschninae (Characters, p. 262). 

 Tribe Brachytronini (Characters, p. 264). 



Genus III. Brachytron Evans (fig. 123). Rs symmetrically forked 

 proximad to pt. Rspl and Mspl only one cell-row below Rs and J/ 4 respec- 

 tively. Pt very narrow. Aa of hw angulated in <$. Eyes meeting only for 

 a moderate distance. Auricles present in <$. 



3. B. hafniense Miiller ( =B. pratense Muller). <$ abd 40 41, hw 3536, 

 pt 4-5, yellowish brown; memb. small, white. Thorax and abd. hairy, dark 

 brown with bands and spots of yellow, green or blue. App. sup. long, curved ; 

 inf. short. $ abd 38, hw 35. Dorsal thoracic bands reduced to spots ; other 

 markings yellower. Local. July. 



Tribe Aeschnini (Characters, p. 265). 



Genus IV. Aeschna Fabr. (Plate II, fig. A). Sectors of arc. arising near 

 middle of arc. ; pt long, of moderate width. Rs unsymmetrically forked close to 

 level of pt. Rspl and Mspl curved, 3 4 cell-rows below Rs and J/ 4 respectively 

 at middle. Aa of hw angulated in <$. Auricles present in <J. 



Fig. 170. Anal appendages of males of A eschna. dorsal view. A. Ae. grandis Linn. 

 B. Ae. junceo -Linn. o. Ae. r.oerulea Strom. D. Ae. mixta Latr. E. Ae. cyanea 

 Muller. F. Ae. isosceles Muller. Original. 



4. Ae. grandis Linn. <$ abd 55 57, hw 48 50, pt 3. Wings yellowish- 

 brown all over. Aa of hw as in No. 5. Eyes closely contiguous. Frons 

 without a T-mark. Coloration brown, thorax with two pairs of lateral yellow 

 stripes. Abd. constricted at 3, with very small blue or yellowish spots. App. 

 sup. 4-5, inf. 2; shaped as in fig. 170 A. ? abd 51 53, hw 47 51, pt 3-5. 

 Abd. not constricted at 3, almost uniformly brown; apps. 3, leaf-like. Fairly 

 common ; Southern. July Sept. 



5. Ae. juncea Linn. <J abd 53 59, hw 43 48, pt 4. Wings hyaline, 

 C yellowish. Aa of hw 2-celled (fig. 171 A). Eyes closely contiguous. Frons 

 with a T-mark. Thorax with narrow dorsal and broader lateral yellow bands. 



