216 
GENUS NEONEURA (oDONATA) 
once forms a trident, none of the l^ranches of which reach the front edge of the 
frons; from either side of the median ocellus a black bar runs directly to and 
surrounds the antenna, from which it is produced forward and inward in one 
branch to the front edge of the frons, and, in a second branch, produced back- 
ward and outward against the eye, which is very widely bordered with black 
from this point backward; from each lateral ocellus a black bar runs outward 
and forward to meet the black area along the eye; this black bar may be 
joined to the black around the ocellus or widely separated from it; in the 
former case the blue area behind the bar and on either side of the median black 
of the occipital crest is two-branched at its outer end, one branch running 
forward and outward, the other backward and outward, toward the eye from 
which they are widely separated; in the latter case, i.e. when the black bar 
above described is separated from the lateral ocellus, the pale area behind it is 
joined across the gap with the spur-like pale area running outward and for- 
ward from the lateral ocellus toward the antenna, from which it is widely sep- 
arated; opposite the occipital crest, and slightly posterior to it, is a very small 
pale spot near the eye, reduced to the merest point in one specimen; and 
posterior to this small spot is a short transverse pale bar, just discernible from 
above, which is still more widely separated from the e5'e. Antenna with 
second joint black, apex blue, remainder brown, third joint pale at base. 
Rear of head black, bordered with pale greenish blue against the eyes. 
Prothorax black; sides and anterior border of front lobe blue, wider on the 
sides; middle lobe with a bright blue spot on either side occupying most of 
the lobe; posterior edge of hind lobe blue bordered. Propleuron with the 
upper half black and lower half bright blue in irregular pattern. 
Thoracic colors bright blue and black, the blue only slightly paler on the 
sides and below. 
Abdomen bright light blue and black, seen from above largely blue; basal 
two-thirds of segment one black; two with a wide longitudinal black bar on 
either side not reaching base or apex, subapically produced dorsally in a tri- 
angular spur which almost meets with the one on the opposite side; seg- 
ments two to six with ver}^ narrow, scarcely discernible, basal black rings, 
and two to ten with apical black rings or apical black more extensive; 
three to seven have the longitudinal lateral black stripe like two, sep- 
arated from the base as in two, but reaching the apex; the blue dorsum 
and the subapical blue area, defined by the dorsal development of this 
stripe, become progressively narrower from three to seven; the basal third 
or slightly more of eight is entirely blue, narrowing from this point back 
to near the apex of the segment, with a subapical constriction; nine dor- 
sally black, a large quadrate sub-basal blue spot on either side; ten, black. 
Sides below bright blue or, on three to six, yellowish; the lateral black 
stripe on three to six widening near the apex and reaching the lower margin; 
black spot on eight of irregular pattern, longest below, but not reaching the 
base or the lower margin, enclosing a large subapical blue spot near its lower 
posterior portion, this blue spot often continuous along its lower part with the 
blue of the entire extreme lower l>order of the segment; nine with the large sub- 
basal blue spot described in dorsal view, and a subapical blue spot homologous 
