98 NEUROPTERA. 
on the front wings, the humeral stripe hardly more than a line; from A. agrioides, 2 , 
and A. violacea, 2°, by this last-mentioned character and by segments 8 and 9 being 
unspotted with black ; from A. mesta (and var. putrida), 2, by the wider mid-dorsal 
thoracic stripe, segments 8 and 9 not spotted with black, three antenodal cells, and 
shorter pterostigma. 
The mesostigmal lamina of A. tmmunda, 2, is shaped like that of A. agrioides, 2 
(Tab. IV. fig. 26), but is smaller. 
34. Argia violacea. 
Agrion violaceum, Hagen, Syn. Neur. N. Am. p. 90 (1861) '. 
Argia violacea, Selys’, Calvert *, Kellicott*, &c.; Williamson, 24th Ann. Rep. Dept. Geol. Indiana, 
p. 262 (1900) ’. 
Hab. Uvirep States, Lone Mt., New Mexico (7. D. A. Cockerell: 1 3), Maine to 
Virginia, west to Michigan and Illinois, Texas. 
Var. pallens, var.n. (Tab. IV. figg. 25, 61, 61 s.) 
3. Rear of the head pale. Pale (reddish-violet) antehumeral stripe three to five times as wide as the black 
mid-dorsal, Humeral stripe a mere line, occasionally absent. Segment 2 reddish-violet, each side with 
a superior, narrow, black stripe, widened at its distal end, which does not reach the apex, or this stripe 
reduced to an anteapical spot ; 3-7 reddish-violet, each side with a black spot in the apical fifth or fourth, 
unconnected with its fellow of the opposite side, on 7 the apical black extends forward as a stripe almost 
to base; 8 and 9 bluish-violet, each side with an inferior black stripe of variable length or even absent. 
9. Differs from the male as follows :—Pale brown usually replacing the violet of the male. Mid-dorsal thoracic 
avd humeral black stripes reduced to little more than lines. Segments 3-6 as in the male, but in 
addition with a black postbasal streak each side, which on 5 and 6 is sometimes united with the apical 
black; 8 and 9 each side with a superior black spot in the basal half, 8 sometimes with an inferior black 
stripe each side in the apical two-thirds. 
éo 2. Pterostigma of the front wings 1 mm. long, surmounting one cell (72°/, 3 2), more than one cell 
(14°/, 6 2), or less than one (14°/, ¢ 2); of the hind wings, 1:18 g,1 mm. 2 long, surmounting 
one cell (76 °/, 3, 86 °/, 2 ), more than one (10°75 9/, g, 14 °/o 2), or less than one (14°25 °lo 3). 
Antenodal cells on the front wings 4 (96:5 °/, 3, 72°/, 2), 3(21°%/, 2), 3+ (7 "lo 2), or 5 (55%, B)s on 
the hind wings 3 (89°5 9/, 5, 93°/, 2),4(7%/o 3 Q), or 84 (35%, S). 
Dimensions.—Abdomen, ¢ 27, 2 24; hind wing, ¢ 22, 9 21:5 mm. 
Hab. Unirep States, Tucson, Arizona (coll. Adams: 3 3 ).—Mexico, Guadalajara. 
(Schumann: 2 3,2 2), Puente de Ixtla, Morelos (coll. Deam: 1 ¢ ), Amula [1 3], 
Chilpancingo [3 ¢,2 ¢], Tepetlapa [1 ¢ |, and Savana Grande [2 3 | in Guerrero 
(H. H. Smith), Oaxaca [1 ¢,1 2] and Mitla [1 3,1 2] (coll. Deam). 
Taken at Tucson in April, in the Mexican localities from June to October. 
As the varietal name indicates, the chief difference from A. violacea, Hagen, is in the 
smaller amount of black on the thorax and on the seventh abdominal segment. 
35. Argia agrioides. (Tab. IV. figg. 26, 62, 62 s.) 
Argia agrivides (Selys, MS.), Calvert, Proc. Calif. Acad. Sci. (2) iv. p. 476, t. 15. fig. 14 (apps. ¢) 
(1895) *. 
