28 NEUROPTERA. 
Nor can the extent of the red spot at the base of the wings be correlated with some 
particular variation in shape of the superior appendages. Males with very similar 
appendages may differ considerably in the size and coritour of the basal spot (e. g., two 
males from Victoria, Tamaulipas, with appendages as in fig. 15, have the basal spot 
on the front wings reaching, in one case, one-half the distance to the nodus, in the 
other two-thirds of that distance, accompanied by differences in shape of the spot). 
Again, males with the basal red spot very similar in extent and shape may possess 
differently-shaped superior appendages (e.g. a male from Victoria and one from 
Jojutla). 
As to the absolute limit to which the red basal spot extends in the Mexican and 
Central-American specimens, the material at hand gives as the minimum one cell beyond 
the quadrilateral, with the costal and subcostal spaces uncoloured, for the front wings 
(Acambaro), and the apex of the quadrilateral for the hind wings (Acambaro); and as 
the maximum 14 cells beyond the quadrilateral (87 of the distance from base to nodus), 
costal and subcostal spaces coloured to fourth antecubital beyond the level of the apex 
of quadrilateral, for the front wings (Linares), and eleven cells beyond the quadrilateral 
(8 of the distance from base to nodus) for the hind wings (Linares). This minimum 
coincides with the minimum for specimens from the United States, so far as known to 
me; but the maximum is less than that of some Texan individuals in which the red 
attains the greatest extent to be found in any or all of the forms which are here 
referred to H. americana—viz., on the fore wings, on the costal margin to the third 
from the last antecubital, and on the hind margin to the level of the fourth postcudbital ; 
and on the hind wings, on the costal margin to the last antecubital, on the middle of 
the wing to the level of the second postcudital (M. C. Z.). It must not be supposed, 
however, that the amount of red increases from south to north in Mexico (7. e. towards 
Texas), the examples from Guerrero being very similar to those from Monterey in this 
respect. In one and the same locality, be it in Texas or in Mexico, a considerable 
variation in the extent of this spot occurs. 
between figg. 3 and 12: 1 3 Tepetlapa, 64; 2 ¢ Tepic,-73--77. Intermediate between figg. 3 and 16: 
1 $ Jojutla, 62; 2 § Guadalajara, 73; 1 ¢ Tepetlapa, ‘67; 1 ¢ Monterey,-71. Intermediate between 
fige. 4 and 11: 1 ¢ Pike’s Eddy, Pa.,°57. Intermediate between figg. 4,12, and 16: 1 ¢ Guadalajara, °68. 
Intermediate between figg. 4 and 16: 1 g Elkhart, Indiana,-68. Intermediate between figg. 5 and 14: 1 ¢ 
Delaware Co., Pa., 54. Intermediate between figg. 7 and 13: 1 ¢ Denver, Colorado, no pter. on hind 
wings, ‘59. Intermediate between figg. 7 and 14: 2 g Round Mt., Texas, -92--81. Intermediate between 
figg. land 14: 1 g Bloomington, Ill., 6. Intermediate between figg. 12 and 14: 2 ¢ Pike’s Eddy, Pa., °58. 
Intermediate between figg. 14 and 16: 1 ¢ Delaware Co., Pa., -64. Intermediate between figg. 15 and 16 
1 3 Texas, 69. Intermediate between figg. 16 and 17: 1 ¢ Tepic, ‘74; 1 g Texas, 89; 1 g¢ Bloomington, 
Ill., °67. 
The philosophical reader, as well as the systematist, may use these data as a commentary on the remarks 
of Walsh, ‘ Proceedings of the Entomological Society of Philadelphia,’ ii. pp. 210 et seq. 
