174 PROCEEDINGS OF THE ACADEMY OP [1885. 



DESCRIPTIONS OF NEW SPECIES OF LEPIDOPTERA. 



BY HERMAN STRECKER. 

 Papilio Nezahualcoyotl. 



S expands 3 to 3^ inches. Head and body of same color, 

 and marked as in the ordinary Philenor ; all the wings broader, 

 and not nearly as elongate as in that species, and the secondaries 

 without tails. 



Upper surface. Primaries blackish brown, with a dark blue 

 shimmer towards the inner angle ; a submarginal transverse row 

 of five white spots, the first which is between the discoidal ner- 

 vules is much the smallest, the next three are of nearly uniform 

 size, and the last one, between the last median nervule and the 

 submedian nervure, is geminate. Fringe near the apex black, 

 from thence to the lower discoidal nervule black and white 

 alternately, and from the latter to inner angle white, with black 

 only at the termination of the veins. 



Secondaries dark shining blue, with a submarginal row of six 

 large white more or less lunate spots, the one at anal angle 

 narrow, and much the smallest. Fringe of marginal indenta- 

 tions white ; at termination of veins bluish black. 



Under surface. Primaries paler than above, markings the 

 same. 



Secondaries after the manner of Philenor, but the brown of 

 basal half extending over greater area ; the continuous submar- 

 ginal band of large spots of a deeper orange, more inclined to a 

 red or brick-color. 



From New Mexico, close to the Mexican border. 



This insect bears about the same relation to the true Philenor 

 that Hospiton does to Machaon, or Anticostiensis to Asterius, 

 though in neither of the latter is there that almost total obso- 

 lescence of the wing-tails that so remarkably distinguishes the 

 present form. It would be curious to know by what process 

 nature has effected this abortion of the caudal appendages, and 

 why it should occur in an exceedingly limited extent of 

 territory. 



All the examples of Philenor which I have seen from Cali- 

 fornia have short tails to the wings, not much over half the 

 length of eastern examples, and often much less ; in the Cali- 



