PAPILIO XII., XIII. 



the jiosterior dentations lengtliened into tails, and in Pllumnni^ this peculiarity 

 is carried still farther. In man}* respects 7\inius is as aljerrant on the one side 

 as is Pihimnus on the other. Its form is compact, all the others having much 

 pi'oduced wings, its tails are decidedly spatulate. It alone presents a large 

 rounded fulvous spot at the outer angle of hind wings in the female ; in all the 

 others there is no spot there, or it is a minute one or a line, always yellow; in the 

 same sex, the blue scales on Turnus form great lunate clusters, while in liutirlus 

 they lie in a narrow macular stripe, and are often largely obsolete; in the re- 

 maining species they are still less definite, lunius shows dimorphism in the 

 female, and beyond a certain line as we go southward, the black females pre- 

 dominate, and finally supplant the yellow females almost if not quite completely. 

 No dimorphism appears in the othei- species. In the mature stage only is the 

 larva of Eurymadon known, and the same is true of Daunus, while of PUumnus 

 nothing is yet known. Of Turnus and Rutulus we have the full history. In 

 the mature larval stage Rutuhis and Daunus are very much alike, both having 

 the peculiar club-shaped yellow spots on fourth segment ; Euri/medon, contrary 

 to what might have been expected, as the butterfly is very close to Rutulus, 

 differs much from these two ; and Turnus and Rutulus at each larval stage pre- 

 sent marked differences. I compare Turnus with Rutidus stage by stage : — 



RUTULUS. 



YOUNG LARVA. 



Color dark brown ; the wliite patcli on 7 and 8 

 re.stricted to dorsum, just tafiiiig in tlie sul)dorsaf 

 tubercfes on either verge. 



A light stripe runs tlie length of body, outside 

 the sub-dorsal tubercles. 



A double row of dorsal tubercles, minute, each 

 with a hair. 



The tubercles ou i at ends of the cross-ridge 

 are regular cones, ending in a point (J*) ; tlie hairs 

 long. 



The sub-dorsal tubercles all prominent, those on 

 middle segments with three hairs eacli ; all hairs 

 comparatively long {Ir ^). 



The lateral tubercles liave tliree hairs each on 

 2, 3, 4 ; on 5 to 1:^, though small, are distinct, and 

 each bears two hairs (i'). 



The iufra-stigmatal tubercles are equal in size 

 to those of lateral row on corresponding segments, 

 three hairs each on 2, 3, 4, 13, and two each on 

 the rest (S*j. 



TURNUS. 



YOUNG LAKVA. 



Color dark brown ; the white patch saddle- 

 shaped, descending liie sides to or near to spiracles. 



No stripe. 



Dorsal tubercles in same position, l)Ut the 

 merest points with scarcely the stump of a hair. 



These tubercles rounded, sub-ovoid (c'j ; the 

 hairs sliort. 



These tubercles on 3 and 4 are small, low ; on 

 tlie middle segments minute and witiiout liairs, on 

 II to 13 small (e-). 



From 5 to 12 are mere points without hairs; on 

 2 is a point with single hair ; on 3 and 4 are 

 .small, size of that on 5 of Butnlus, and have three 

 and two hairs respectively {c'). 



These tubercles are points, three in horizontal 

 line on 3 and 4 each, on .5 to 12 three in equilat- 

 eral triangle ; ou 2 one hair (e-). 



