73 
pouch belonged to the 7th abdominal, this, however, there is over¬ 
whelming evidence to show to be impossible, but it does appear to show 
that whatever appearance there may be to the contrary elsewhere, that 
the outer rods to the 9th segment have nothing to do with the 
8th, except by way of fusion between portions of the 8th and 9th 
segments. 
It is very difficult to derive the structures we have in these Tinete 
from the Adelids and Eriocephalas, and we have here another item to 
suggest, that Adelids (and Terebrant Lepidoptera) arose not directly 
from the Eriocephalas, but that these Tinea? (and their relatives and 
descendants) arose from some earlier Palaeo-Lepidopteron that was not 
yet specialised in this matter as in Eriocephala. 
One obvious fact in this direction is the character of the wing 
markings, which separates all the Terebrants from the other Lepidop¬ 
tera, even after making allowance for the divergent character of the 
wing markings of these others which point to other primitive 
derivations. 
Returning then to our Blues, these facts seem to render it highly 
probable that the interpretation of the segmentation of the ? abdomen 
is .something like that indicated in the diagram on pi. V., fig. 2, 
roughly taken from a preparation of Everes aryiades. The 8th segment 
is dorsally absent, and is represented ventrally only by the pairing 
organs, the 9th and 10th are well developed dorsally, but neither 
presents any ventral plates. 
The segmentation as suggested is noted on Plate V., compara¬ 
tively with that of Oecophora pseudo-spretella. 
Amongst the photographs of the scent scales of some of the blue 
butterflies that I show you, I may call your attention to those of 
Aryiades polonus, which is a variety of thetis or of coridon, or, according 
to the opinion advanced by Tutt, which I believe is the correct one, a 
hybrid between those two species. The scent scales of thetis and 
corydon are very distinct and very constant in each species (pi. VI.), 
but in polonus most of them much resemble those of thetis, but a con¬ 
siderable number depart from that type to a form very much like that 
of corydon (pi. VII). 
Plate I. 
Fig. 1. 
J > ° * 
>» 4 . 
„ 5. 
Plate II. 
Fig. 1. 
Plate III. 
Fig. 1. 
„ 2 . 
,, 3. 
Explanation of Plates. 
Appendages <r to illustrate tribes of British Blues. 
Everes aryiades (Everidi) x 27. 
Lycaenopsis argiolus (Lycaenopsidi) x 30. 
Lampides boeticus ( Lampididi ) x 24. 
Lycaena avion (Lycaenidi) x 17. 
Agriades escheri (.Plebeidi ) x 10. 
Last segment of ? blues to illustrate tribes of British 
blues, all x 17. 
Everes aryiades. 
Lycaenopsis argiolus. 
Lampides boeticus. 
Lycaena arion. 
Agriades thetis. 
Last segment of certain ? lepidoptera. 
Tinea pellionella x 34. 
Scoparia atomalis x 28. 
Eudoria angustea x 28. 
xxii.-xxiii. 
