144 NEUROPTERA. 
short interno-inferior branch; the appendage viewed from above resembles the outline of a mitten, the 
interno-inferior branch corresponding to the thumb (cf. Tab. V. fig. 38). Inferior appendages almost as 
long as the superiors, paler, more slender, less obtuse at tip which is curved slightly upward. 
2. The single female resembles the Balsas ¢ described above, but differs as follows: the metallic green is 
paler and mixed with brown, the markings which in that male are pale yellow, deeper yellow, and 
orange-red are here all pale yellow, there is a mid-basal black spot on the labrum, the six frontal spots 
are more or less confluent with one another and with the yellow of the gene, the dorsum of segment 2 
metallic green, except for a narrow, transverse, apical, yellow ring. Abdominal appendages slightly 
shorter than segment 10, obscure, simple. Genital valvules reaching back to the apex of segment 10, 
their palps to beyond the tips of the appendages. A small mesostigmal lamina is present on each side 
of the anterior mesothoracie border; its superior margin, viewed from above and from slightly in 
front, approaches, but is not identical in shape with, our figure 3, Tab. IV., of the similar structure of 
Argia extranea. 
3d 2. Wings hyaline, arculus distinctly beyond the second antecubital, relative length of its two limbs 
variable; nodal sector arising nearest the fifth (62°5°/,) or fourth (37-5 °/,) antecubital on the front 
wings, nearest the fourth (87-5 °/,) or third (12°5°/,) on the hind; ultra-nodal sector beginning 2-4 
cells proximal to the inner brace-vein of the pterostigma on the front wings, 1-2 cells on the hind ; 
superior sector of the triangle ending at one-fifth to one-half of the cell beyond the eross-vein descending 
from the nodus, except in one hind wing where it ends at that cross-vein ; pterostigma rhomboidal, grey, 
dark brown, or black, surmounting one cell or very slightly less. Postcubitals, front wings 8-11, hind 
wings 7-9. 
Dimensions.— Abdomen, ¢ 29-31, 9 29; hind wing, ¢ 16°5-17, 2 18°5 mm. 
Hab. Mexico, Iguala, Rio Balsas (Barrett, coll. P. P. €.: 2 3), Dos Arroyos [1 9 |, 
La Venta [1 ¢ in fragments] (H. H. Smith), all in Guerrero. 
The Rio Balsas individual was taken in December, all the others in September. 
5. Protoneura remissa, sp. n. (Tab. V. fig. 43.) 
3s. Dorsum of head and of thorax dark metallic green, of the abdomen shining black. The following parts 
pale (yellow or blue? in life): gens, front edge of labrum, labium, metapleura (except for a metallic-green 
stripe on the second lateral suture, wider at its upper end where it is confluent with the green of the 
mesepimeron, and a superior dark green metepimeral spot), legs (except at the various articulations and 
stripes on the superior surfaces of the femora and of the tibiw, black), ventral surfaces of the thoracic 
and abdominal segments, a narrow transverse basal ring on 3-7 which may be mid-dorsally interrupted. 
Hind margin of prothorax convex, entire. Superior abdominal appendages about one and one-half times as 
long as segment 10, forcipate when viewed dorsally, apices slightly hooked on the inner side; viewed in 
profile, the upper edge is nearly straight, terminating in a narrow process, lower edge greatly produced 
ventralward, very convex. Inferior appendages small, rudimentary, obtuse. 
9. Differs from the male as follows: frons anteriorly and entire labrum (except for a mid-basal black dot) 
pale yellow or blue in addition to the pale areas of the other sex ; mesepimera obscure, brownish (perhaps 
indicating a less mature stage), no stripe on the second lateral thoracic suture, abdominal dorsum (except 
for the pale basal rings as in the male) pale reddish brown on the anterior segments, darker brown on 
the posterior segments,—in apparently older individuals, dark brown throughout. 
Hind margin of prothorax convex, entire, no mesothoracic processes. Abdominal appendages as long as 
segment 10, simple, straight. Genital valvules projecting backward as far as the tips of the appendages, 
their palps as long as the appendages. 
¢ 2. Wings hyaline, arculus usually a little beyond the second antecubital (58 °/, front wings, 75 °/, hind 
wings), but also found at or distinctly beyond that vein, its lower limb at least twice as long as its upper ; 
nodal sector arising nearest the sixth (75°/,) or fifth postcubital on the front wings, nearest the fourth 
on the hind; ultra-nodal sector beginning 3-5 cells proximal to the inner brace-vein of the pterostigma 
on the front wings, 3-4 on the hind; superior sector of the triangle ending at the cross-vein descending 
from the nodus; pterostigma dark brown or black, surmounting one cell or slightly less, the costal 
