148 BritisJi Dragonflies. 



Cat. Neur. Odon. 52 (1890). Corditlia coiuprcssa, Steph. 

 Syst. Cat. 309, n. 3436 (1829), no description. Libellula 

 nitcns, Fonsc. Ann. Soc. Ent. Fr. \\. 146, pi. v. f. 3 (1837). 



Dale's description. 



Viridi-asnea ; abdomine medio fla\'o-maculatis ( $ 

 compresso et alis flavescentibusj. About the size of 

 C. (Euea. Brassy-green ; body compressed, with a row of 

 oblong yellow spots down the back, absent on the 

 seventh and eighth joints only ; head notched in front ; 

 wings very pale greenish-}'ellow, slightly }'ellow at the 

 base in the male ; yellow-brown in the female, along 

 the costa of all the wings, suffused to their centre ; 

 stigma and nervures piceous (Loudon's "Magazine of 

 Natural History," vol. vii., p. 60, Januar}-, 1834). 



[Stephens had ah'eady named the insect Ct>. coiiiprcssa (Stephens' 

 " Systematic Catakjijue," p. 30<;), n. 343O) in 182Q, but he did not 

 describe it till 1836. Evans s,nves compressa as a synonym (Br. 

 Lib., 1845.)] 



Stephens' description. 



yEneo-viridis, nitida, abdomine compresso, linea 

 interrupta dorsali lutea, appendicibus analibus maris 

 superioribus incurvatis, pilosis, inferioribus brevibus 

 emarginatis [Long. corp. 2 unc. — 2 unc. 1^ Hn. ; exp. alar. 

 2 unc. 10 lin. — 3 unc.]. Brassy-green, shining ; mouth 

 below and streak on the labrum luteous ; eyes greenish ; 

 thorax clothed with pale down, its extreme apex and 

 two indeterminate spots towards the base of the wings 

 reddish ; abdomen clavate, the two basal segments with 

 a narrow luteous streak, the third to the seventh with an 

 interrupted dorsal line, and the eighth with a spot at the 

 base luteous, ninth immaculate, tenth with a luteous 



