1898.] GROTE — SPECIALIZATIONS OF LEPIDOPTEROUS WING. 17 



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 ; 

 THE PIERI-NYMPHALID^. 



(Plates I-III.) 

 BY A. RADCLIFFE GROTE, A.M. 



{Read January 21, ISOS.) 



An immediate incentive to the present study is the statement, in 

 Evolution and Taxonomy, that we find, in the Nymphalidae, '^an 

 even greater specialization of the wings than exists in the Pieridae." 

 It may be premised that Prof. Comstock's classification unites in one 

 family two seemingly distinct types under the term Nymphalidae. 

 Also that the neurational character given in the more recently 

 issued '' Manual" of the same author for the Pieridae would exclude 

 the Leptidian^. The two wing types of the Nymphalidae of 

 Mr. Scudder and Prof. Comstock overlap. The Nymphalidae 

 proper, as I would limit the family, have vein iii^ of the fore 

 wings thrown off upon the external margin below apices through- 

 out 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 brush- 



PROC. AMER. PHILOS. SOC. XXXVII. 157, A. PRINTED MAY 17, 1898. 



