MISUMENA. —MISUMENOPS. 141 
[MISUMENA. 
Misumena, Latreille, Nouv. Dict. Hist. Nat. xxiv. p. 185 (1804). 
Type M. vatia (Clerck). Europe. 
Ocular area not exhibiting any distinct angular prominence between the lateral eyes. Legs i. and ii. almost 
entirely devoid of spines, except beneath tibize and protarsi i. and ii. Lateral eyes not separated on 
distinct tubercles, but united by a convex ridge. Posterior laterals not larger than posterior centrals. 
Posterior row only moderately recurved. Lateral anteriors not larger than central anteriors. Posterior 
eyes, centrals and laterals, distinctly smaller than central anteriors. 
The characters of this genus also are inserted for the purposes of comparison, and 
are drawn from an adult female of M. vatia. (Tab. IX. figg. 33, 33 a-d.)| 
MISUMENOPS, gen. nov. 
Misumena, Keyserling, Spinn. Amer., Later. p. 78 (part.) (1880). 
Type M. maculisparsus (Keys.). Taguara. 
Similar to the typical Miswmene, except that (in the female) the anterior row of eyes is less strongly recurved, 
so that a line touching the anterior margin of the laterals would fall slightly within the posterior margin 
of the centrals (in Miswmena vatia this line would fall outside a distance of almost half a diameter of a 
central eye). The lateral anteriors are distinctly larger than the central anteriors. Posterior eyes not 
smaller than the central anteriors, and the posterior row is more strongly recurved than in Misumena. 
The males differ from those of Miswmena in all the above respects, as well as in the fact that the lateral eyes 
are on two more distinctly separate tubercles. In some species the legs are much longer in proportion 
than they are in the typical form, Misumena vatia. The males of Miswmenops resemble those of the 
typical Diew more than do the females, the only differences being that the lateral posterior eyes are 
larger than the centrals in Diea, whereas in Misumenops they are of the same size, and the central 
anteriors in the latter are closer together than to the laterals ; in the former genus they are further apart 
than to the laterals. 
This is purely a genus of convenience, standing between Misumena and Dica, 
instituted to avoid the necessity of lumping these and several other genera together. 
In this connection it is significant that Keyserling referred some of the species 
included in the present genus to Misumena (maculisparsa, rosea, Keys.) and some to 
Dicea (guianensis, Tacz., and damnosa, spinosa, and pallida, Keys.). 
The following Table includes only those species whose types I have been able to 
examine. It is possible, though | think improbable, that the females of some of them 
are indistinguishable by the form of the vulva from others. At any rate, Miswmena 
pallens and M. americana, Keys., and M. pascalis and M. conjuncta, O. P.-Cambr., 
are either respectively one and the same species, or else the form of the vulva is no 
criterion of specific distinctness :— 
Males. 
A. Apex of the spine of the palpal bulb lying in a concave emargination 
of the outer side of the tarsal sheath. 
1. Spine very broad at the base, compressed, ensiform. 
a. Spine very stout and laminate at the base and broad, though 
gradually tapering, to the apex; spiraloid. ‘Tibial spur very 
long, cylindrical, stout. 2. . 6 1 6 ee ew ee ee Sptralis, sp. n. 
