no. 2089. NOTES ON NEOTROPICAL DRAGONFLIES— WILLIAMSON. 603 

 METALEPTOBASIS MAURITIA.i new species. 



Related to the following species from which it is most readily 

 separated by the shorter abdominal appendages" and the form of the 

 apex of abdominal segment 10. Described in the tabulations which 

 follow from 4 specimens in my collection, 3 males from the swamp 

 near Cumuto, Trinidad, March 10, 1912; and 1 male from near 

 Tumatumari, Potaro River, British Guiana, February 9, 1912. 

 This last male was collected in a low, flat area on the right bank of 

 the river just above Tumatumari. On this date this flat was dry, 

 but it showed evidence of being frequently submerged for long periods. 

 The ground was bare over large portions of the surface, and the 

 vegetation was in scattered clumps, confined to a very few species. 

 The dragonfly was taken resting on a leaf near the ground. More 

 careful and intelligent search might have revealed more, but only 

 the one was seen. While the specimen from British Guiana is con- 

 siderably larger than the Trinidad specimens, I am convinced that they 

 are the same species. The type of mauritia is a male from Trinidad, in 

 my collection. 



Paratype— Cut. No. 18063, U.S.N.M. One of the 3 males from 

 Cumuto, Trinidad, mentioned above. 



METALEPTOBASIS MANICARIA.2 new species. 



Related to mauritia and described in the tabulations which follow. 

 Sixty-six males, all taken at the swamp near Cumuto, Trinidad, on 

 March 8 and 10, 1912, are before me. 



The following notes were made on the living colors : Colors gener- 

 ally dull. Eyes beneath light bluish green, above dark green, with a 

 posterior bright orange spot 3 which is bordered in front with black (as 

 in the case of brysonima, not only these brilliant colors of the eyes 

 fade but the pattern even disappears). Dorsum of thorax narrowly 

 black; mesepisternum pale greenish brown; mesepimeron paler; 

 metepisternum and metepimeron pale yellowish with greenish 

 reflections. Dorsum of abdomen metallic greenish black, below 

 this bluish green, rather dull and obscured ; segments 8-10 dull yellow- 

 ish brown with bluish or greenish traces laterally. 



Two specimens in 95 per cent alcohol, one year after capture, are as 

 follows: The colors of the eyes are well preserved, with the orange 

 somewhat paler. The mesepimeron, metepisternum, and metepimeron 

 are about the same color, pale yellowish, but I do not detect the 

 greenish reflections, which are still evident, however, on the apical 



1 Mauritia is the generic name of "the tall palm which grows in quantity together on the savannah" 

 (Broadway). 



2 Manicaria is the generic name of "a palm which I have seen in watery positions near Cumuto " (Broad- 

 way). 



» This spot is on the posterior portion of the dorsal surface of the eyes; not to be confused with the rear of 



the head or eyes. 



