30 NEUROPTERA. 
entirely covered thereby, old males usually with no transverse 
dark band on the anterior surface of the frons. Abdomen, g 26-33, 
9 28-295; hind wing, ¢ 27-35, 2 31-33mm. .. . . . IL. simplicicollis. 
DD. Younger males and the females with only a median dorsal black 
line or narrow stripe on abdominal segments 4-9, old males with a 
transverse dark band on the anterior surface of the frons. Abdomen, 
& 27-29°5, 2 245-28; hind wing, gf 30-32, 2 29°5-32°5. 
simplicicollis, subspecies ? collocata. 
CC. Hind wings with a basal brown or brownish-yellow spot reaching out 
about half-way to the submedian cross-vein. Thorax pale green or 
luteous with a broad black antehumeral stripe each side, the inner 
(mesial) margin of which is subparallel to the inner margin of the 
stripe of the opposite side ; width of the pale green or luteous between 
the two antehumeral black stripes 2°3-2°5 mm. ; abdomen pale green 
or luteous (¢), red (¢); thorax and base of abdomen of old males 
pruinose, remainder of abdomen red; vulvar lamina projecting 
3-5 mm. Abdomen, @ 25-29°5, ? 25-28; hind wing, ¢ 29-33, 
9 80-33 mm... . . 2 peruviana. 
CCC. Hind wings with a basal spot reaching ontward at least to ; the sub. 
median cross-vein. 
E. Thorax and abdomen red ( ¢) or luteous (?), only the carine and 
sutures of abdomen black (¢) ; basal spot of hind wings reddish- 
brown (¢) or yellowish (2), reaching outward to the submedian 
cross-vein or a little more remote; vulvar lamina projecting 1 mm. 
Abdomen, ¢ 24°5-28°5, 2 22; hind wing, 3 30°5-33, ¢ 31°5 mm. 3. mithroides. 
EE. Thorax dark obscure brown ; abdomen luteous, yellow, or reddish- 
yellow, carinz, sutures, apical half of segments 4-7 and almost all 
of 8 and 9, black ; basal spot of hind wings dark brown, reaching 
outward to the first antecubital or even as far as the discoidal 
triangle ; in old individuals the entire body and the basal spot of 
the wings become almost black; vulvar lamina projecting 1°3 mm. 
Abdomen, ¢ 27-30, ? 26-30; hind wing, ¢ 33-36, 9 88-38 mm. 4. attala. 
BB. Abdomen slender (e. g. segments 4—6 each four times as long as wide), 
much narrower in dorsal view at segment 4 than at segment 2, base of 
abdomen greatly inflated also in profile view. 
F. Thorax luteous with a broad black antehumeral stripe each side, the 
inner (mesial) margins of the two subparallel and separated by a 
luteous interval of 2°5-2°8 mm. in width, outer margins ill-defined ; 
abdomen luteous, carine, sutures, apical half of segments 4~7 and all 
of 8 and 9, black; hind wings with a dark brown basal spot reaching 
outward to the submedian cross-vein or a little beyond and to more than 
half-way to the first antecubital; in old males the entire body and 
the basal spot of the hind wings become almost black ; vulvar lamina 
projecting 1-15 mm. Abdomen, J 30°5-87, 9 29-36; hind wing, 
6 315-85, 9 815-88 mm. . . . 2... ww we ew. OB Over benata. 
