72 Mv. W. F. Kirby on OJonatafrom Sierra Leone. 



Described from three specimens (2 $ , 1 $ ), all more or 

 less damaged and perhaps not quite mature, captured on 

 Sept. 2, 9, and 13 (1899). 



Fig. 2. 



Beblecia adolescens. 



Crocothemis erytlirtea. 



Libelhda erythrcea, Brull6, Exped. de la Moree, iii. (I) p. 102, pi. xxxii, 



fig. 4 (1832). 

 Crocothemis erythrcea, Kirb. Cat. Neur. Odon. p. 21. n. 1 (1890). 



19 specimens, Aug. 25 to Sept. 22 (1899). 

 Specimens from West Africa are rather smaller and 

 slenderer than typical ones from South Europe. 



ThermortJiemis Austeni, sp. n. (PI. II. figs. 1, 1 a.) 



Long. corp. 54-56 millim.; exp. al. 94-98 millim. ; long, 

 pter. 4 millim. 



Male. — Rufo-testaceous, thorax with a slight brown line on 

 each shoulder and the borders of the patagia black ; abdomen 

 in the male pulverulent blue. Legs black in the adult male, 

 except at the base of the femora ; otherwise rufo-testaceous, 

 with black tarsi ; spines strongly developed. Wings hyaline, 

 with black nervures, very slightly tinged with yellowish 

 brown at the base ; pterostigma yellow, between black ner- 

 vures; tips very slightly browned. Fore wings with 20-23 

 antenodal (the last continuous) and 13-14 postnodal cross- 

 nervures ; triangle divided by two nervures ; two supra- 

 triangular nervures ; triangle followed by four rows of cells, 

 increasing subtri angular space consisting of 5-8 cells : hind 

 wings with 13-15 antenodal and 13-16 postnodal cross- 

 nervures ; triangle traversed and with the base generally 



