POLYSTIGMA. 469 
POLYSTIGMA, gen. nov. 
The single species of this genus is remarkable for the unusual development of the 
front legs of the male, which are perfect, that is to say they possess terminal claws. 
The fourth and fifth joints appear to be nearly fused, and the joint between the third and 
fourth is barely indicated. There is a spine beneath at the end of the tibia, another 
near the proximal end of the first tarsal joint, and another on what appears to be the 
fourth joint. The terminal joint of the front leg of the female is as long as the 
second joint, and all the tarsal joints as well as the distal end of the tibia are strongly 
spinous beneath. This nearly perfect structure of the front leg of the male we have 
not found in any other Erycinid; it, in fact, forms an exception to the definition of 
the family, so far as the development of the tarsi is concerned. The prolongation of 
the coxa beyond the trochanter joint is present, as is universally the case in this family, 
this and the strong development of the basal nervure of the secondaries indicate its 
true position beyond all doubt. 
The harpagones of the male are bilobed, the lower lobe short and blunt, the upper 
one produced to a slightly upturned point, both of them outwardly setose. There is a 
piece stretching across above the penis in an arch; the penis itself is stout and 
decurved from its distal half, where there is a line of ten or twelve strong papille. 
The bursa copulatrix of the female has two long strong thorn-like projections, the 
surface of which is granular. 
1. Polystigma nais. 
Chrysophanus nais, W. H. Edw. Trans. Am. Ent. Soe. v. p. 291 a 
Lemonias nais, W. H. Edw. op. cit. ix. p. 7°; N. Am. Butt. 11. Lemonias, t. 1°. 
Alis rufis fusco marginatis, disco nigro maculato, anticis macula costali ultra cellulam alba; subtus anticis 
pallide rufis nigro maculatis, posticis glaucis, nigro quoque maculatis, plaga ultra et infra cellulam linea- 
que submarginali rufis, ciliis alterne albis et fuscis. 
@ mari similis. 
Hab. Norv America, Southern California 1, Colorado?, Arizona 1—MExIco, Northern 
Sonora (Morrison), Pinos Altos in Chihuahua (Buchan-Hepburn). 
An isolated species, bearing a curious resemblance to some members of the genus 
Chrysophanus, in which genus Mr. W. H. Edwards placed the first specimens that 
came under his notice. | 
It is common in Southern Colorado, where Mr. Neumogen found it at Oak Creek 
Cafion in the months of July and August. 
Most. of our specimens were taken by Mr. Morrison in Arizona and the adjoining 
| portions of Sonora. Mr. Buchan-Hepburn took a single female at Pinos Altos in the 
State of Chihuahua. 
