4 Watson, Calinaga, Single Genus of a Sub-family. 



Siam {Sudassana), the three districts being on the south- 

 east borders of Thibet, and Davidis at least penetrates that 

 highly elevated plateau whose lowest valleys are at least 

 12,000 feet above sea-level ; one would thus expect the 

 whole of the habitat, on account of its great altitude, to 

 be inhabitated by forms of lepidopterous insects which 

 might exhibit to us types of very old derivation from the 

 original phylum, relics of an ancient lepidopterous fauna. 



The first points which struck me in working out the 

 Calinaga habitat were that the species are found con- 

 tiguous to or in Thibet; and that in the various directions 

 radiating from and including Thibet, there are a number 

 of genera which possess well-marked characters belonging 

 to the sub-families — PierincE, Thaidince, ParnassiincB and 

 LeptocircincE — and especially that they all possess in 

 common one character, namely, that they are mostly 

 monotypic and rarely bispecific, and only in two cases 

 are there three species to the genus. 



The following list will indicate the point : — 



Sub-family. Gemis. 



PierincB ; Mesapia, One species, Tartary and N . E. 



Thibet. 

 Baltia, Two species, E. Turkestan, 



and N. W. Himalayas. 

 Davidina, One species, N. China. 



LeptocircincE; Leptocircus* Two or three species, Indo- 



Malayan and West China. 

 The species from West 

 China (J/^^^i-) having simple 

 claws, and the Javan species 

 having double ones, as is 

 found in Pierince. 



* Leptoch'cus might truly be referred to as two genera, possibly this will 

 ultimately be done. 



