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GENUS NEONEURA (oDONATA) 
a])(Ioinen pale f^reen, almost whitish; sternites of two to eight 
black or with a black median line; appendages and ventral 
margin of genital valves brown. Legs pale greenish, black at 
knees.” 
This is the only species of Neoneura known from Trinidad, 
where it occurs along the smaller rapid streams. In Costa Rica, 
however, it was taken associated wdth amelia, its nearest rela- 
tive, in at least three localities. 
One male, in poor condition, from Santa Domingo, Rio Corozal, 
Golfo Dulce, C'osta Rica, is probably unusually dark. The 
head in dorsal view is black with three or four small obscure 
pale spots on either side of the vertex, the prothorax and thorax 
are almost entirely black except beneath; the mesepisternum 
has on its lower half an oi-ange stripe, wide below, narrowing 
and disappearing above, there is a dull light brown stripe be- 
hind the humeral and the two lateral sutures, and the latero- 
ventral carina is paler brown; the abdomen is not especially 
dark except that eight to ten are largelj' black in lateral view, 
especially below and apically, the dorsal basal red narrowing 
apically and reaching al)Out two-thirds the length of eight and 
nine. 
Neoneura carnatica Selys (Figs. 20, 21, 22, 2.3, 60, 61, 62, 63, 89 and 90.) 
Cuba, all in Hagen Collection: one male, three females under 
a separate pin label, “N. palustris,” male with pin label “Cuba,” 
three females each with a written pin label, “Poey, Cuba,” and a 
printed pin label “Hagen,” two with a written pin label, “8. 9 
one with “14. 9 three males, two females under a separate pin 
label “iV. carnatica,^’ one male and one female each with a single 
pin label “Cuba” (the female may be maria), one male and 
one female (latter with three last segments lost) each with a 
large written blue name label, a written label, “Cuba, Poey,” 
a number label, “8.cf” and “8. 9 ” in each case, and the printed 
label “Hagen”; the remaining male like the last mentioned, but 
without the large blue label. 
For a discussion of this species, see text under maria. 
Neoneura maria Scudder (Figs. 24, 56, 57, 58, 59, 91 and 92.) 
Material consisting of one male and three females in the Hagen 
collection, under the pin label palustris, not attached to any 
specimen, by whose arrangement I do not know, all seem to me 
