240 THE ENTOMOLOGIST S RECORD. 
circumstance is, of course, most interesting in itself, but it has no 
bearing on the question of whether there be one species or two. 
Dr. Verity describes a difference in the ordinary scales of the two 
forms, but here it is difficult to follow him, since the scales on both 
seem very much alike, and on each example there are many gradations 
in the seales according to the position in the wing, and to whether the 
blue or the black scales are in question, and Dr. Verity gives no indica- 
tion as to what scales he selects for comparison, nor have I been able 
to verify the differences he mentions as to any particular scales, or as 
to their average (if one can average such things) character. 
I have examined the appendages of a considerable number of speci- - 
mens, and can find no differences except such as are varietal and similar 
in the two forms. Dr. Verity says that the uncus in aragonensts tends 
to be shorter, straighter, and less pointed. What Dr. Verity calls the 
uncus I do not know, what corresponds to the uncus, if it does corres- 
pond, consists of two portions, one on either side of the middle Jine, 
rather soft and fleshy, and to those Dr. Verity’s description does not 
appear applicable. He also says the valves are shorter and broader ; so 
far as my observstions go, they vary within certain limits equally in 
the two forms, viz., from 2-7mm. to 3‘°2mm. in length. Ihave counted 
the number of teeth on the chitinous portion (harpe) of the clasps in a 
few specimens of coridon, and found they were 20 to 22, and in a few 
arayonensis they were 16 to 19, but extending my observations the next 
three coridon I counted gave 12, 15, 18. So that there is no indication 
of specific difference here, nor in any other portion of the male append- 
ages I scrutinised. In the female appendages the form of the terminal 
plate of the (heina) rein often gives a specific character, but here varia- 
tions of form and outline are slight and the same in both forms. 
Dr. Verity’s statement that the tibial spur (extremity of tibia) is 
shorter and thicker in aragonensis is fully borne out by my examination 
of them. They vary a little, but the spur in arayonensis averages about 
0:18mm. long, and of coridon 0-24mm. The ratio would be the same 
if the measure differed, should some other point be taken as the base 
of the spur. We arrive then at these contradictory conclusions as to 
these Spanish forms. Wing form says arragonensis=coridon, hispana 
=aragonensis. Tibial spurs both equal to arayonensis. Discal line, 
arragonensis=aragonensis, hispana=coridon. Underside colour and 
markings, both=coridon. 
That Dr. Verity’s thesis does not solve satisfactorily the nature of 
these Spanish forms does not diminish the fact that he has solved, or 
come very close to solving, the meridionalis problem. 
I thought now I had a definite structural difference between the 
two species, the same as we find, only more pronounced, between aego 
and argyrognomon, where of course it is not the only structural differ- 
ence between the species, but is a very convenient one to use. So I 
examined arragonensis and hispana, and found that arragonensis had a 
spur shorter if anything than in aragonensis, but unfortunately hispana 
had one even shorter, so that unless arvagonensis and hispana are both 
aragonensis, Which seems impossible, this character of the tibial spur is 
only racial and not specific. 
The underside markings of arvagonensis and hispana are very much 
alike, both agree closely with coridon, and are quite unlike aragonensis 
(meridionalis), the cheyrons are small, rather round margined, less 
