HETARINA. 25 
Dimensions.—Abdomen, 3g 34-42, 9? 29-33°5 mm.; hind wing, ¢ 24:5-31°5, 
9 27-32°5. 
This species is very closely allied to H. cruentata, differing from it less than do some 
individuals of H. americana from each other. I have not, however, been able to find 
transitional forms between H. cruentata and H. vulnerata such as connect the varying 
individuals of H. americana into one species. 
The chief differences of H. vulnerata from H. cruentata, Ramb., appear to be :— 
3. Inner inferior edge of the superior appendages with a median convex enlarge- 
ment, which is not angular from any point of view; this enlargement is followed by 
a small acute tooth, usually not visible from directly above, but to be seen when the 
appendage is viewed from the inner side at an angle of 45° with the horizontal plane. 
In H. cruentata the corresponding enlargement is more pronounced, so as to form a 
tubercle, which appears angular at its distal side, and there is no small tooth following. 
Of the other differences given in the ‘Monographie des Calopterygines,’ p. 130, 
none seem constant enough to be diagnostic. Thus some H. vulnerata males (e. g. from 
Dublan and Orizaba) have the epistoma metallic blue: many H. cruentata have it 
metallic green. H. vulnerata, 5, usually has the thoracic dorsum dark coppery-red 
almost to the humeral suture (which is occupied by a narrow yellowish-brown stripe), 
and the mesepimeron dark brown, with a metallic coppery reflection; H. cruentata, 3, 
has the dark mid-dorsal metallic band reaching only about halfway from the mid- 
dorsal carina to the humeral suture, and only the posterior half of the mesepimeron 
dark-coloured and metallic, so that there exists a wide brownish-yellow or brown 
non-metallic stripe between the two metallic ones, whose width is as great as that of 
the mesepimeron and of which the humeral suture forms the median line. Yet a 
H. vulnerata, 3, from Orizaba, agrees with Hf. cruentata in this respect. The inner 
surface of all the femora is yellowish-brown in the younger individuals of both. species, 
but disappears, giving place to blackish with increasing age in both. ‘The tips.of the 
front wings are distinctly edged with brown in some males of H. vudnerata (from 
Omilteme and Cuernavaca), while they are perfectly clear in some males of H. cruentata 
(from Caché and San Gerénimo), although other individuals from the same localities 
have the brown edging. I am unable to find any differences in the obtuseness of the 
basal red spot, or in the degree of complication of the postcostal reticulation. The 
area between the costa and the median on the front wing is in some H. cruentata as 
clear as it usually isin H.vulnerata. No more constancy exists in the degree of snowy 
whiteness of the reticulation of the under surface of the basal spot of the hind wings, 
which whiteness, indeed, seems to increase with the age of the individual. 
2. After having attempted to distinguish the females of HH. vulnerata and 
H. cruentata according to the differences given in the ‘ Monographie,’ with results quite 
improbable, when compared with the numbers and geographical distribution of the 
males of these two species, and noting that no previous authors have stated that they 
BIOL, CENTR.-AMER., Neuropt., October 1901. e 
