88 
Dr. T. A. l^iiman on Callophrys avis. 
unsealed areas are almost identical in the two species. The 
unsealed area corresponds to the red area in C. avis. The 
rest of the antenna is of the same colour if the scaling be 
removed; this is also the case in C. ruhi, the difference 
between the two antennae, denuded of scales, being the 
blackness in C. rubi of the black part of the unsealed 
portion (Plate XIV). 
The face differs less than one at first supposes. C. avis 
has rather more and longer liairs, but the great difference 
is the absence of the silver lines of ruhi (from which the 
genus is named), these scales being red in G. avis. 
The brilliance of these lines in C. ruhi makes the hairs 
curiously inconspicuous, an effect aided by their duller 
colour, which varies from grey (sometimes almost brown) 
to black (Plate XIV). 
In regard to the dark margins to the white spots in 
C. ruhi, it is worth noting that in the genus Ncolycaena, 
there is a very similar row of white spots with very similar 
dark margins. Taking into account the very similar 
androconial brand, there is no doubt that hail Neolycaena 
had a green undenside (after all a really trivial difference), 
we should have considereil the species to belong to Callo- 
2 ^hrys. Staudinger places the Neolycamas in Theda, 
though he separates ruhi under Callophrys. Curiously 
Bingham retains Neolycaena amongst the “Blues,” although 
Bethune-Baker, so long ago as 1892, showed (in our 
Transactions) their true position. Callophrys, Neolycaena, 
and Thestor iorva a very natural tribe (7’/;e.s’to?’hf'i). 1 would 
venture to predict that the larva of Neolycaena will be 
found to possess a honey-gland. I have noted the brand 
in C. avis as triangular, really it is polygonal and might 
almost as well be called circular. Its lower margin is 
rather angular. The relative measurements in the two 
species are; longitudinal, i. e. in line of veins, 0 . ruhi, 1'7 
Tum.; C. avis, 1'2 inm.; transverse, C. ruhi, 0‘75 mm.; C. 
avis, 1'05 mm. 
It will be seen on reference to my figures (Plate XVI), 
that the difference in the form of the brand is not so much 
due to a difference in the portion of the wing occupied by 
it, as to a marked difference in the arrangement of tlie 
veins underlying it—a difference not easy to describe but 
obvious on inspection. These figures are rough and dia- 
"rammatic, but are nevertheless sketched under camera, 
and may be trusted as correct on this pomt. 
