234 
GENUS NEONEURA (oDONATA) 
is farther represented l\v a floating vein half way across the cell basal to the 
terminal triangular cell behind Cui. In another specimen the descending 
cross-vein distal to the termination of Cui is forked in both front wings, form- 
ing a triangular marginal cell, which is not reached however by Cui. In 
another specimen, in the left hind wing there is a transverse cross-vein in the 
marginal cell posterior to the subquadrangle. 
9 . — Genae very light brown, almost white. Labrum light brown with a 
basal median spot and on either side at the extreme edge a basal spot, black. 
Rhinarium, nasus, frons and vertex brown or light brown; nasus with a spot 
in front on either side, another posterior to this at the base, and a longitudinal 
median band, black; frons in front with two black spots in front of the base 
of the antenna; frons above usually with a large brown spot on either side of 
the median line. The vertex has the black pattern of the male reduced almost 
to extinction; the band from each lateral ocellus to the eye is represented by 
only the reduced distal half; there is also a small spot at either end of the 
occipital crest; there are some very obscure dark shadings about the ocelli, 
and sometimes there is a spot against the eye, opposite the spot at the end of 
the occipital crest, and a shortened, reduced bar of black posterior to this. 
Antenna with second joint light brown, almost white, with the inner face 
darker or black; third joint pale at base shading quickly into dark brown. 
Rear of head very light dull yellow. 
Prothorax light brown, patterned as in the cf, spots somewhat reduced. 
Propleuron light brown, dusky ringed inside the pale border. 
Thorax brown, darker above, patterned similar to the cf , reduced, variable; 
the mid-dorsal stripe more or less interrupted into a row of spots, each spot 
halved by the pale mid-dorsal carina; the stripe on the second lateral suture 
reduced to a spot above. 
Abdominal pattern similar to the cf , with the general color brown instead of 
red, sides below on two to six light dull green. 
Legs cream colored, femora with two indistinct brown blotches on the body 
and one at base and apex. 
^^'ings clear; stigma light yellowish brown, covering less than one cell. 
In the wings examined the terminations of Cui, A, and the descending cross- 
vein from the first postnodal are normal, in marked contrast to the conditions 
found in the males. 
Costa Rica: Rio Liberia, January 10, 1910, (Tristan and 
Calvert); Rio iMedio, east of Santa Cruz, Januaiy 20 and 22, 
1910, (Calvert); Rio Diria, west of Santa Cruz, January 23 and 
26, 1910, (Tristan and Calvert); Rio Diria, east of Santa Cruz, 
March, 1916, (Alfaro); Rio Santa Barbara, below town of same 
name, Guanacaste, January 28, 1910, (Tristan and Calvert); 
Rio Alorote, Guanacaste, February, 1912, (Tristan); Rio Buena 
Vista, Guanacaste, February, 1912, (Tristan); Rio Sipance, 
Nicoya,Guanacaste, February, 1912, (Tristan); Santa Domingo, 
Rio Corozal, Golfo Dulce, INIay, 1913, (Tristan): a total of 
