PAPILIO III., IV., V. 



secondaries fill the interspaces across the whole wing, often taking a lanceolate 

 shape ; blue scales sometimes besprinkle the yellow ground quite up to the cell ; 

 the sub-marginal spots as in the male ; in many individuals there appears a stripe 

 of blue scales upon the inner side of the marginal border of primaries at inner 

 angle. Under side as in the male. 



GLAUCUS, dimorphic form ; always female. 



Upper side black ; primaries without markings, except a sub-marginal series of 

 yellow spots, which are similar to those of the yellow form, but smaller and often 

 minute ; occasionally also there is a 3"ellow lunate spot at the outer extremity of 

 the cell, most often indistinct, but sometimes large and conspicuous ; secondaries 

 have the spots on both margins, and also the blue band, as in the yellow female ; 

 the disk nearly to base often thickly sprinkled with blue scales, and always in 

 some degree. Under side black or brownish-black ; the black discal bands char- 

 acteristic of the species are present in this form, distinct on secondaries, but faint 

 on primaries, and in the blacker examples partly wanting, especially beyond, the 

 cell ; the marginal black border sometimes distinct, but often only indicated by 

 a deeper shade at inner angle, the inclosed spots as in the yellow female. (Plate 

 III., Fig. 3, summer brood ; Plate IV., Fig. 2, 3, winter brood.) The larger 

 examples of the summer brood often have primaries strongly fiilcated. 



Examples are occasionally seen of a chocolate-brown color, or of yellow suf- 

 fused with brown, and in these cases all the bands are distinct ; on the under 

 side yellow or gray-brown, more or less suffused with black. (Plate V., Fig. 2.) 

 Others occur mottled with patches of black and brownish or grayish-yellow. 

 (Plate v., Fig. 3.) 



The hi- formed female represented on Plate V., Fig. 4, was taken at Coall)urgh, 

 and, as will be seen, the right side is yellow, the left black, the dividing line 

 passing down the middle of the body. This insect is distinguished as beloug- 

 ing equally to two of Hubner's coitus, by some esteemed genera, the yellow half 

 being a Jasonides, the black Euphoeades. 



Egg. — Sub-conoidal, the breadth and height equal, tlattened at base, smooth, 

 deep green, soon changing to greenish-yellow, and s]iecke<l with reddish-brown. 

 Duration of this stage eiglit to ten days. (Fig. a, magnified.) 



Young Larva. — Length, .1 inch; cylindrical, the anterior segments thick- 

 ened ; color, black-brown ; on 7 and 8 is a white patch, saddle-shaped, reaching 

 on dorsum to middle of 'J, and descending the sides on 7 and 6 to base ; at 

 each end of a compressed chitinous cross-ridge on 2 is a large tubercle, rounded, 



