Vol. xxvii] ENTOMOLOGICAL NEWS. 319 
Acanthagrion indefensum n. sp. (Plate XVII, figs. 3, 4, 7). 
Abdomen ¢ 23; hind wing ¢$ 15-15.5. 
@.—Similar to kennedii and gracile but smaller; like kennedu as 
described except as noted below; one specimen with a large blue spot 
on either side between the apex of the second joint of the antenna 
and the eye, and a small obscure yellowish spot on either side just in- 
side the first joint of the antenna, the blue postocular spots in this 
specimen much larger than in the other specimen where they are about 
the size of the spots in kennedii, and in both specimens the postocular 
spots are irregular lobate in outline as contrasted with the entire out- 
line of kennedii. Rear of head above, about foramen, and below adjoin 
ing mouth parts, black, thus differing from both gracile and kennedii 
which are pale below. 
Prothorax black, thus darker than in kennedii; front lobe with a 
median bright blue spot. Propleuron below dull or leaden blue. 
Thoracic pattern similar to kennedii but clear blue replacing the yel- 
low or yellowish-tinged parts of kennedii, in which character indefen- 
sum is like gracile. The black stripe along the second lateral thoracic 
suture is more definite and more intensely black than it-ever attains in 
gracile and as it very rarely attains in kennedit. 
Abdominal segment 1 variable; in one specimen the dorsal black, 
which is about as wide as in kennedii, fails to reach the apical integu- 
ment by a distance equal to the length of this integument, that is, the 
black is a quadrate basal spot; in the other the black is narrowed api- 
cally, but reaches the blue integument, and there is a median blue spot 
which is contiguous posteriorly with the integument. Sides of 1 and 
2 blue, instead of green or greenish, thus again resembling gracile. 
Remainder of abdomen like kennedti with apical integument only of 7 
blue. 
Legs much darker than in gracile or kennedii; first femora entirely 
black except the base on the inner surface; on the second femora the 
pale basal color on the inner surface not quite reaching the middle of 
the femora; the third femora still paler, with a pale line on the an- 
terior dorsal surface, this pale line broader basally and disappearing 
before the apex where the femur is completely circled with black, the 
inner surface otherwise pale; first tibiae with anterior dorsal surface 
black; second and third tibiae black at base and apex; tarsi black, 
claws dark amber, darker than in related species, toothed as in 
gracile. 
Wings hyaline; stigma black, similar in shape to kennedii. 
Wismar, British Guiana, Feb. 16, 1912, two males in my 
collection. 
One of the specimens was sent to Dr. Calvert who writes, 
“Most like A. gracile -minarum of anything I know but ab- 
