72 NEUROPTERA. 
stripes on 3-6, or an inferior black stripe on each side of 8 and 9, or with 
both, hence different from section 2); rear of the head pale, with or 
without black postbasal streaks on 3-6, 8-10 at least blue on dorsum ; 
superior appendages variable, but when bifid the branches are subequal. 
M. Superior appendages almost entire at tip, the inner margin with a small, 
subacute, anteapical projection. 
N. Antenodal cells on front wings 4. 
O. Inferior appendages rounded, not bifid at tip, but with an ante- 
apical tooth on the upper margin; dark postbasal streaks present 
on 8-6, and confluent with the apical black . ; . 29. rhoadsi. 
OO. Inferior appendages bifid at tip, lower branch distinctly longer 
than the upper; black postbasal streaks present on 3-6, usually 
not confluent with the apical black 
OOO. Inferior appendages bifid at tip, lower branch. equal to or shorter 
~ than the upper. 
Black postbasal streaks present on segments 3-6 
Black postbasal streaks absent from segments 3-6 
NN. Antenodal cells on the front wings 3; postbasal black stripes 
present on segments 3-6, 8 and 9 pale, each side with an inferior 
. 80. extranea. 
. 31. vivida and varieties. 
. 82. funebris. 
black stripe . . . cr . 33. immunda. 
MM. Superior appendages trilobed o or bilobed at apex, inner margin rounded 
and convex before the apex; antenodal cells on the front wings 4. 
Pale colours on the thorax, and segments 3-6 violet, humeral stripe 
present, no postbasal black stripes on segments 3-6, 8 and 9 blue 
with an inferior black stripe each side . . [violacea, Hagen*.] 
Pale colours on thorax, and segments 3-6 reddish-violet, humeral 
stripe a mere line, otherwise as in violacea. . 34. vielacea, var. pallens. 
’ Pale colours on thorax, and segments 3-6 blue, humeral stripe present 
and forked, no postbasal black stripes on 3-6, 8 and 9 blue with 
no black stripes . . . . . 85, agriotdes. 
Pale colours and humeral stripe as in A. agriotdes, segments 3-6 
with black postbasal stripes confluent with the apical black, 8 and 9 
with a black stripe each side as long as the segments . . agrioides, var. nahuana. 
Females. 
(N.B.—AIl identifications made by this key should be checked off with the figures 
of mesostigmal lamine, see figg. 1-26, Tab. IV.) 
§ I. Dorsum of abdominal segments 3-6 mostly black. 
A. Dorsum of segments 8 and 9 pale, with black markings. 
B. These markings consisting of two stripes occupying only the basal half 
of segments 8 and 9. 
-C. Black dorsal stripes on segments 8 and 9 not confluent. 
Pterostigma long, 6 or 5 antenodal cells on the front wings, 
no mesepisternal tubercles . . 6 . 6 «2 «© oe 1. percellulata. 
