332 PROCEEDINGS OF THE ACADEMY OF 



macular row upon tbefore wings is almost obsolete, except the spot upon the 

 inner margin, which is prolonged into a dash. 



Hind wings marked as in Asterius 9, but the blue clouds between the yel- 

 low bands are reduced to small rounded patches, insensibly diminishing to the 

 outer angle ; that upon the abdominal margin is lunulate and covers a ful- 

 vous crescent, not ocellate as in Asterius ; tail not so long as in that species ; 

 emarginations white ; expanse 3*5 4 inches. 



Below much paler ; primaries with a series of submarginal rounded yellow 

 spo's, and between these and the cell another of large fulvous sagittiform 

 spots ; a minute yellow spot on the end of the cell ; one, somewhat larger, 

 above the origin of the fourth subcostal veinlet. 



Secondaries as in Asterius, with the exception of the anal mark, which is 

 simply a lunule as on the upper surface, and of the existence of a very minute 

 fulvous spot within the cell, rarely obsolete, always much less than the cor- 

 responding one in Asterius; the yellow emarginations are also considerably 

 narrower than in that form. 



Hal. Mexico. Coll. Entom. Society. 



A very remarkable approximation to our most common species of Papilio, 

 and indeed the general similarity existing in color and form has been almost 

 sufficient to induce me to regard it as only a singular aberration, or a well 

 marked local race. 



Upon a closer and structural examination, however, we discover the follow- 

 ing points of difference in this most essential particular. 



First, the antennae of Asterius are fully a line longer than in the new type ; 

 secondly, the fourth subcostal veinlet is thrown off one-third nearer the cell 

 than in our endemic species ; thirdly, in it the cell is broader than in the 

 corresponding tf, and the disco-cellular veins ot equal length ; fourthly, upon 

 the secondaries the upper disco-cellular does not form so great an angle with 

 the second subcostal, and the intervals between the median veinlets are 

 larger, consequently the cell is both broader and longer. 



This adds a fourth member to that group of segregated forms, ranging over 

 the largest portion of central and southern North America, and consisting 

 heretofore of Asterius, Aristor, and Indra. 



Mr. Win. H. Edwards is in possession of a beautiful new species from Ari- 

 zona, belonging to the same series, which I hope he will soon describe. 



28. Lycjena isola, nov. sp. 



Upper surface brownish black, glossed with violet blue ; a black terminal 

 line, broadest at the apex of the fore wings, thence diminishing to the anal 

 angle ; a small rounded, submarginal black spot near the latter ; fringe 

 white. 



Underneath dark ash grey : primaries with two submarginal, slightly 

 waved whitish lines ; interior to these a row of six large rounded black spots, 

 all ringed with white ; two white streaks at the end of the cell. 



Secondaries with a submarginal row of indistinct brown spots, of which the 

 three nearest the anal angle are black, the first and third irrorated with me- 

 tallic golden-green atoms, and the third surmounted by a yellowish lunule ; 

 all the others are preceded by whitish crescents ; above these there is a suf- 

 fused white belt, and still farther, two double rows of waved and crenulated 

 whitish lines ; a small subcostal black ocellus near the base. 



A narrow terminal black line edges the outer margin of the four wings ; 

 fringe ashy white. Expanse "88 inches. 



Antenna? black ringed with white. 



Hal). "Mexico (near Vera Cruz)." Win, H. Edwards. 



29. Thecla Xami, nov. sp. 



Male. Upper surface drab brown tinged with olivaceous, costa and outer 

 margin of primaries broadly margined with blackish-brown. 



[Nov. 



