268 On Odonata from the West Indies. 



nervures, except below the subnodal sector ; subtriangulav 

 space consisting of three cells : hind wings with 9 antenodal 

 and 10 postnodal nervures ; membranule rather small, 

 blackish. 



A slender species, witli the frontal tubercle more strongly 

 bifid than in the more typical species of the genus. 



1 Grenada, no. 233. 



14. Lepthemis vesiculosa. 



Libellula vesiculosa, Fabr. Syst. Ent. p. 421. n. 7 (1775). 



1 St. Vincent, " Windward side, May." 



10 Grenada, nos. 136, 223, 205, 184, 233, 101. 



" Swamp on Leeward coast, 1 mile north of St. George's. 

 This species is common in Grenada, near sea-level, both sides 

 of island, Aug. 22." 



2 Union Island, October. 



Agrionidse. 



COENA GRIONINJS. 



15. Argia insipida. 

 Argia insipida, De Selys, Bull. Acad. Belg. (2) xx. p. 387 (1865). 



24 St. Vincent. 



Nos. 189, 190. 



" Sea-level." 



" St. Vincent, Windward side, 500 feet." 



" Bowwood Valley, near Kingstown, 1000 feet, by 

 mountain-stream, Dec. 23." 



" Richmond Valley Forest, 1800 feet, by mountain-stream, 

 Dec. 21, 81. Colours blue and black." 



" Pools near Bannonallie, Jan. 12." 



" Forest, Soufriere Volcano, 2000 feet, Jan. 5." 



" Hermitage Estate, Cumberland Valley, 1000 feet, 

 Dec. 20. Open stagnant pools." 



7 Grenada. 



"Balthazar (Windward), 250 feet, second growth." 



Nos. 56, 64, 164, 219, 229. 



16. Argia, sp. 



1 St. Vincent, near Kingstown. 



A single specimen of a very dark species, probably new, 

 but which it would be useless to describe without a series. 



