92, NEUROPTERA. 
g. Wings darker (yellowish or brownish) in the apical part of the 
hind wings. . . . . . 7% old titia. 
gg. Wings darker (yellowish or yelowish-browa) in "the basal part 
of both pairs... . . oe eee we ew A Americana. 
aa, Labrum entirely black, with metallic green or blue reflections. 
h. Hind wing 28°5 to 32 mm.long . - »- - © + ee te th tos 12. capitalis. 
hh. Hind wing 36°5 mm. long en eee ee ee ee ew ee 18, majuscula. 
§ III. Hind wings , with three + rows of cells in the area mentioned in §1. Labrum black, 
with a metallic green or blue reflection. 
Males. 
a. Inferior appendages rudimentary . . 18. majuscula; 14. infecta; 15. tolteca (distinguished 
by their superior appendages, see Tab. IT.). 
aa. Inferior appendages well developed. . - - - © © + e+ e+ es hoes 16. rudis. 
Females. 
a. Postcostal area of the front wings not very densely reticulated. 
b. Postcostal area of the front wings with 2 or 3 rows of cells between the 
postcosta and the hind margin. Median space and tundniatersl with 
an average of 7 cross-veins each . . . . . . 14. infecta. 
bb. Postcostal area of the front wings irregular, with @ maximum of 5 cells | 
(not rows) on a straight line from postcosta to hind margin. Median 
‘space and quadrilateral with an average of 1] cross-veins each . . . 16. rudis. 
aa. Postcostal area of the front wings very densely reticulated, the cells not 
arranged in distinct rows, often 8 or 9 cells on a straight line from post- 
costa to hind margin. © 2. 2 ee ee eee eee eee 1%, marcia. 
The following sexes are unknown:—The male of maxima; the females of fusco- 
guttata, sempronia, pilula, miniata, tolteca. . 
It may also be of use to the student, who has, unfortunately, to deal with broken 
material, to enumerate the species which when adult possess certain features of 
coloration, &c., in the wings, an asterisk (*) indicating that the species in question 
varies as regards the feature stated :— 
Males only. 
Tips of the wings clear:—4. americana* ; 2. cruentata* ; 3. vulnerata*® ; 12. capitalis* ; 
15. tolteca (?). 
Tips of the hind wings only with a red spot :—8. caja; 12. capitals * ; 9. pilula; 14. infecta. 
Tips of both wings with a red spot :—11. miniata ; 12. capitalis*; 13. majuscula*; 16. rudis. 
+ Occasionally, in individuals of H. americana, there are three rows of cells in this area, but the labrum 
is in large part yellowish. 
