Odonata from the West Indies. 263 



4. Trithemis fusca. 



LibeUvhfusca, Ramb. Ins. N^vr. p. 78 (1842). 



Originally described from Cayenne. It also occurs in 

 Colombia. 

 9 Grenada. 

 Nos. " m;' " 106," " 205," and " 233.^' 



5. Trithemis puUa. 



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

 Libelhda unimnctilata, Burm. (nee De Geer, Ramb.), I. c. n. 43 (1839). 

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

 Libelhda fervida, Erichs. Schomb. Reisen in Brit.-Guiana, iii. p. 684 



(1848). 

 Lihellula jtistina, Selys, Sagra, Hist. Cuba, Ins. p. 450 (1857). 



All these references appear to me to belong to the same 

 species. 



Both ummaculata, 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 i)ulla 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 umhrata. 

 Libelhda umhrata, 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." 



