orbitulus and pheretiades section of genus Plebevus. 209 
the Alai Mountains. I have examples from both places 
and they are alike, and there is no difficulty in separating 
them from the species from Namangan, which he called 
pheres (pherecydes, Gr. Gr.). I have this latter also from 
Bokhara and a good series from the Pamir; it is quite 
impossible to separate the specimens from the three local- 
ities, but they are all easily separable from the Osch and 
Alai ones. Phereclus, Gr. Gr., will therefore fall as a 
synonym of pherecydes. The species is very close to phere- 
teades, but it can be recognised by the tone of colour being 
of a more delicate greener blue than that insect, and the 
dark borders are much narrower; it is very difficult to 
separate them from the undersides. One character in 
the genitalia, however, shows strongly the difference 
between the two; the upper hard chitinous part of the 
end of the clasp is more elongated, or perhaps the lower 
soft lobe is shorter in pherecydes, whilst the upper apex 
itself is furnished with long strong teeth as in jaloka, the 
central teeth being the longest. This is a marked and good 
character in all Plebeids, and I have found it constant. In 
pheretiades these teeth are nothing more than fine very 
short even serrations. The tegumen also has slight differ- 
ences, the bifid arms in pheretiades are produced upwards 
so as to form a high saddle rather beyond the middle, 
descending suddenly rearwards in a sharp short curve and 
rising slightly again at the hindermost bridge; in pherecydes 
the saddle is not nearly so high, there is very little curve 
at the back, the hinderpart being little more than an inclined 
plane; the aedoeagus is shorter than in pheretiades, more 
even in structure and slightly stouter. 
Plebeius pheretiades, Kv. (Plate VI, fig. 4; Plate VIII, 
eT") 
I have already shown the difference in colour between 
this and the preceding species, these two being the closest 
so far as colour relation is concerned; the genitalia and 
the apex of the clasp are figured for comparison. 
Plebeius pheretiades pheretulus, Stgr. 
In colour it is not difficult to separate this local race from 
both its parent form and from pherecydes; it is very 
much greyer, almost less blue than the form of orbitulus 
that occurs plentifully about 1,000 feet below the top of 
