82 NEUROPTERA. 
12. Argia herberti, sp.n. (Tab. IV. figg. 37, 37s.) 
d. Rear of the head black, a pale stripe along the eye-margins. Pale antehumeral stripe one-half as wide as 
the black mid-dorsal. Humeral stripe forked in its upper third, at its middle equal in width to the pale 
antehumeral. Segment 2 pale brown, each side with a superior black stripe, the two enclosing- between 
them a pale oval spot with a narrower prolongation which reaches to the apex; 3-7 black, with a pale, 
transverse, basal ring which is prolonged backward on the mid-dorsal line of 3-5, viz. to five-sixths the 
length of 3, three-fourths of 4, one-sixth of 5; 8 and 9 pale brown, each side with an inferior black stripe 
as long as the segments, and which on 8 reaches farther up on to the dorsum at apex than at base. 
Pterostigma of the front wings -94 long, of the hind wings ‘98 mm. long, surmounting more than one cell, 
except in one hind wing in which it surmounts but one cell. 
Antenodal cells 4, except on one hind wing on which there are 3+. 
Dimensions.—Abdomen 380°5, hind wing 23: 5 mm. 
2 unknown. 
Hab. Mexico, Amula in Guerrero 6000 feet (7. H. Smith: 1 3). 
Taken in August. Named after Mr. Herbert H. Smith, whose extensive collections 
in Mexico form such a large part of the material for this work. 
13. Argia popoluca, sp.n. (Tab. IV. figg. 8, 38, 38 s.) 
3. Rear of the head black. Pale (blue) antehumeral stripe slightly more than one-half as wide as the black 
mid-dorsal. Humeral stripe forked in its upper third, about equal in width to the pale antehumeral. 
Segment 2 black, a basal, blue, mid-dorsal spot reaching two-thirds the way to the apex, and each 
side with two inferior blue spots; 3-6 blue, each side with an inferior black stripe from base to apex, 
widened in the apical eighth (on 3) to fourth (on 6), in which it meets its fellow of the opposite side on 
the dorsum; 7 black, with a transverse, basal, blue ring; 8 and 9 blue, each side with an inferior black 
stripe as long as the segments. . 
¢. Differs from the male as follows:--Pale antehumeral stripe green. Humeral stripe fading into brown 
above, with no distinct trace of being forked. Segment 2 black, with steel-blue reflection, no blue spots ; 
3-7 black with steel-blue reflections, 3-6 with a narrow, pale, transverse, basal ring, medially interrupted ; 
§ black, with a blue spot on either side of the dorsum in the apical fourth; 9 much faded, perhaps blue 
with an inferior black stripe each side. . 
3 9. Pterostigma of the front wings, °8 ¢,°9 2 long, of the hind wings -85 mm. long, surmounting more 
than one cell on all. . 
Antenodal cells on the front wings 4, on the hind wings 38, in all cases. 
Dimensions.—Abdomen, ¢ 26, 2 24:5; hind wing, ¢ 185, 9 19°5 mm. 
Hab. Mexico, Teapa in Tabasco (H. H. Smith: 2 3,1 2). 
The three types were taken in March. The specific name is derived from the 
“ Popolucas,” a tribe formerly inhabiting Southern Mexico. 
14. Argia indicatrix, sp. n. (Tab. IV. figg. 23, 39, 39.) 
‘g. Rear of the head black. Pale (blue) antehumeral stripe two-thirds as wide as the black mid-dorsal. 
Humeral stripe three-fourths to equally as wide as the pale antehumeral, fading into light brown in its 
upper half. Segment 2 blue, each side with a black stripe as long as the segment, widened at the hinder 
end, where it is confluent with a more inferior black spot; 3-7 black, with a transverse, basal, blue ring 
prolonged on mid-dorsum of 3 to five-sixths its length and on 4 for the basal third; 8 black, with a mid- 
dorsal blue stripe as long as the segment, narrower at its hinder end; 9 blue, each side with an inferior 
black stripe as long as the segment. 
Q. Ditters from the male as follows :—Pale antehumeral stripe one-half (or somewhat less than one-half) as 
wide as the mid-dorsal. Blue on dorsum of segment 2 reduced to a narrow median stripe or central spot ; 
