Odonata from the West Indies. 263 



4. Trithemis fusca. 



Libellula fusca, Ramb. Ins. Nevr. p. 78 (1842). 



Originally described from Cayenne. It also occurs in 

 Colombia. 



Q (jrrAnriQjl 



Nos. " 56," " 106," " 205," and " 233/' 



5 . Tin them is pulla. 



Libellula pulla, Burm. Handb. Ent. ii. p. 855. n. 41 (1839). 

 Libellula unimaculata, Burm. (nee De Geer, Ramb.), I. c. n. 43 (1839). 

 Diplax ochracea, Hag. (nee Burm.) Neur. N. Amer. p. 181 (1861). 

 Libellula fervida, Ericbs. Scbomb. Reisen in Brit.-Guiana, iii. p. 584 



(1848). 

 Libellula justina, Selys, Sagra, Hist. Cuba, Ins. p. 450 (1857). 



All these references appear to me to belong to the same 

 species. 



Both unimaculata, De Geer, Ramb., and ochracea, Burm., 

 should have only two rows of post-triangular cells, instead of 

 one or more rows of three, followed by one or more rows of 

 two increasing, as in typical Trithemis. The species which 

 Erichson calls unimaculata, and of which he describes the 

 female, may be called T. Erichsoni, and differs from jmlla in 

 the adult male being pruinose, and the vertex steel-blue in 

 both sexes. 



28 Grenada. 



Nos. 21, 42, 53, 94, 205, 223, 233, and 235. 



" 3rd coll. no. 75." 



" Swampy forest by seashore, north of Granville, May 9." 



6. Trithemis umbrata. 

 Libellula umbrata, Linn. Syst. Nat. (ed. x.) i. p. 545. n. 13 (1758). 



An extremely common species throughout tropical America. 

 It varies a little in size and in the breadth and depth of 

 colour of the dark band in the male. 



7 St. Vincent. 



" Great Head Swamp, southern end of island, near sea, 

 Dec. 24." 



" Hermitage Estate, Cumberland Valley, 1000 feet, Dec. 20. 

 Open stagnant pools." 



"Grand Sable (Windward), by pools near sea, Jan. 4." 



47 Grenada. 



Nos. 101, 124, 184, 205, 223, 233. 



" 3rd coll. nos. 74, 75." 



" Common on open swamp near seashore, north of Gran- 

 ville, May 9." 



