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The posterior margin of all the thoracic segments is edged with a row of small tubercles. The epimera are narrow, those of the second, third and fourth segments being rounded at the top, while those of the last three segments are more acute.
The first abdominal segment is entirely concealed by the last thoracic segment. The second, third, fourth and fifth segments are likewise edged with a row of small tubercles. The last segment is widely rounded. The outer branch of the uropods is somewhat narrower and shorter than the inner one and is rounded at its extremity. The inner one is bluntly rounded. Both are fringed with hairs, and on their exterior margins are armed with spines. The prehensile legs have three long, stout spines on the merus and two on the propodus. The gressorial legs are covered with spines.
Two individuals of this species were found in the southern part of the Gulf of California, at Station 2824, eight fathoms, type (U.S. Nat. Mus., No. 20652), and Station 2828, ten fathoms.
SPECIALIZATIONS OF THE LEPIDOPTEROUS WING;
BY A. RADCLIFFE GROTE, A.M.
(Read January 21, 1898.)
An immediate incentive to the present study is the statement, in Evolution and Taxonomy, that we find, in the Nymphalidæ, "an even greater specialization of the wings than exists in the Pierida." It may be premised that Prof. Comstock's classification unites in one family two seemingly distinct types under the term Nymphalidæ. Also that the neurational character given in the more recently issued "Manual" of the same author for the Pierida would exclude the Leptidianæ. The two wing types of the Nymphalidæ of Mr. Scudder and Prof. Comstock overlap. The Nymphalidæ proper, as I would limit the family, have vein iii, of the fore wings thrown off upon the external margin below apices throughout all the leading groups. But in the Fritillaries, which seems to be the most generalized group, there are genera, like Euptoieta, in which this vein reaches the apex, as in all the other brushPROC. AMER. PHILOS. SOC. XXXVII. 157. A. PRINTED MAY 17, 1898.