70 NEUROPTERA. 
. 
A. Labrum pale. 
B. Pale colours on dorsum of segments 3-6 limited to a transverse basal 
ring and at most a fine mid- dorsal line; rear of the head chiefly 
black, except in 4. percellulata and A. sedula. 
C. Segment 8 mostly black on dorsum. 
D. Segment 9 mostly pale on dorsum. 
E. Superior appendages bifid at tip. 
a. Pale antehumeral stripe half as wide as dark mid-dorsal, 
inferior appendages not bifidat tip . - + - . 1. percellulata. 
aa. Pale antehumeral stripe one-third as wide as dark mid- 
dorsal, inferior appendages bifid . . - - + + + + 2. calida. 
aaa. Pale antehumeral stripe one to three times as wide as dark 
mid-dorsal, inferior appendages bifid . . - + + - (tibialis, Rambur *. | 
aaaa. Pale antehumeral stripe absent, inferior appendages bifid. 3. wilsont. 
EE. Superior appendages not bifid, inferior appendages higher 
than long . . . tee we ee ee we A meesta. 
DD. Segment 9 mostly black on dorsum. 
Superior appendages not bifid at tip, basal half to fourth of 
dorsum of 9 pale . . - - ; . 5. translata. 
Superior appendages bifid at tip, apical ‘third (or only a pair 
of apical spots) of 9 pale. . . - + - we ee «6 tezpi. 
CC. Segments 8 and 9 pale on dorsum, each side with an inferior 
black stripe. 
Inferior appendages bifid . 2. . - - © + e+ 8 e 8 8 7. sedula. 
Inferior appendages trilobed (profile) . . . - + + + + + 8. pulla. 
BB. Pale colours on dorsum of segments 3-6 consisting of a transverse 
basal ring, and a mid-dorsal stripe on some or all of them, tapering 
posteriorly ; 8 mostly blue on dorsum; rear of head chiefly black. 
F. Superior appendages distinctly bifid, inner branch much longer 
than the outer. 
Segment 8 with no apical dorsal black spot ; mid-dorsal pale 
stripeon 3and4only .. . . . 9. ulmeca. 
Segment 8 with an apical dorsal black spot, mid- dorsal pale 
stripeon 8-6 . . = . . . 10. adamsi. 
FF. Superior appendages variously formed, but not distinctly bifid; no 
apical, dorsal, black spot on 8. 
11. oculata. ‘ Most readily distinguished 
12. herberti. by their appendages, 
13. popoluca. see Tab. IV figg. 36— 
14. indicatriz. — 39. 
AA. Labrum black. 
Pale colours on segments 3-7 consisting only of a transverse ring, 
and a mid-dorsal stripe tapering posteriorly on 3 and a small 
mid-dorsal basal spoton 4 . 6. 6 « © 8 ee ee 15. rogerst. 
