160 NEUROPTERA. 
C. Superior appendages in the basal third with an inferior longitudinal 
carina which terminates in a denticle, apical two-fifths curved 
slightly downward ; lower margin of frons, most of nasus and base 
of labrum dark brown ; abdomen 32, hind wing 245 mm. . . 
CC. Superior appendages hardly carinate inferiorly except at extreme 
base, the rudimentary carina not terminating in a denticle; face 
without dark markings. 
D. Apical third of superior appendages curved downward ; abdomen 
33-37, hind wing 25-830 mm. . . . oe 
DD. Apical third of superior appendages nearly straight ; ‘abdomen 
80-35, hind wing 25-27 mm. a 
BB. Superior appendages with a prominent, abrupt, superior tooth at 
two-thirds their length, apical third curved strongly downward, 
their lower edge carinate only at the extreme base and without 
denticles ; the two branches of the inferior appendage each with 
a slender, superior, depressed, anteriorly-directed tooth on the inner 
margin near the base ; hind margin of the occiput slightly concave ; 
lower margin of frons, most of nasus and of labrum dark brown; 
abdomen 83°5, hind wing 28mm. . . . 
AA. Basal half of lower edge of superior appendages markedly enlarged j in 
profile, longitudinally carinate ; face without distinct dark markings. 
E. Inferior carina of superior appendages terminating in a distinct denticle 
at one-third the length of the appendages, hind margin of the occiput 
convex ; abdomen 34-36, hind wing 30-825 mm... . . . 
EE. Inferior carina of superior appendages not terminating in a denticle. 
F. Dark submedian thoracic stripes absent. 
G. Tibie superiorly yellow or with yellow lines; abdomen 383-36, 
hind wing 28-31 mm. 
GG. Tibiz brown ; abdomen 39, hind \ wing 35 1 mm. (from de Selys’s s 
description) . . . - 2 1 1 + se we . 
FF. Dark submedian thoracic stripes present, tibice superiorly black. 
H. Hind margin of occiput slightly convex, no distinct median 
swelling on the upper occipital surface, superior appendages 
not angulate superiorly, brown antehumeral stripe reaching 
to the mesinfraepisternum; abdomen 386-38, hind wing 
30-32°5 mm. oe . - ee . 
HH. Hind margin of occiput elevated in the middle, a median 
swelling on the upper occipital surface, superior appendages 
convexly angulate at half their length, brown antehumeral 
stripe not reaching to the mesinfraepisternum; abdomen 36—- 
39°5, hind wing 80-82 mm... . 2. . . - we en 
l. eutainia. 
2. viperinus. 
3. elaps. 
4. ophibolus. 
5. cophias. 
6. crotalinus. 
7. boa. 
[9. compositus.] 
. 10. designatus. 
