GEOMETRIDAE. 



135 



Chloroclystis Hiibner. 



Verz. bek. Schmett., 323, 1826.— Meyrick, Tr. Ent. Soc. Lond., 1892, p. 65.— Hampson, Faun. 

 Brit, hid., Moths, iii, 390, 1895.— Turner, Proc. Roy. Soc. Vict., xvi, 228, 1904.— Dietze, Biol. 

 Eupith., 23, 1913.— Simotricha Warren, Nov. Zool., iv, 395, 1897. — Dyserga Petersen, Iris 

 xxii, 281, 1909. 



Distinguishable from Eupithecia by the subcostal venation of the fore 

 wing, SC 1 running into, or at least anastomosing with C. A large genus, though 

 not nearly so large as Eupithecia and characteristic chiefly of the Indo- Australian 

 Kegion. In the secondary sexual developments it almost rivals Anisodes. 

 Assuming that these should be treated as merely subgenera, there are perhaps 

 about two hundred known species ; of these only six are Palaearctic and about 

 forty Ethiopian. The few New- World species which have been placed here 

 do not belong to the genus with the exception of C. elaiachroma Bastelberger 

 (Jahrb. Nass. Ver. Nat., lxi, 83, 1908 = E. aquanivaria E. D. Jones, Proc. Zool. 

 Soc. Lond., 1921, p. 343, t. iii, f. 3), of Bolivia and Brazil, which forms a special 

 section of it. 



The name-typical section, with but slightly modified scaling on the 

 hind wing, contains only the European C. coronata Hiibner, with races in Japan 

 (C. lucinda Butler) and N. W. India (unnamed) ; its immediate offshoots 

 (Sesquiptera Warren, Gymnopera Warren = ? Oligoclystia Bastelberger, Chloro- 

 plintha Warren and Actheolepis Warren) with increased specialisation of that 

 wing, are Indo-Australian, but are not yet known to extend beyond New Guinea. 

 The group with simple wing-structure {Calliclystis Dietze) is distributed 

 throughout the greater part of the range of the genus, and is strongly repre- 

 sented in New Zealand by Pasiphila Meyrick (= Helastiodes Warren), which is 

 not always structurally distinguishable from it, though very commonly the 

 antenna bears long fascicles of cilia. To this group {Calliclystis) belong, with 

 the possible exception of C. bosora, the few Polynesian Chloroclystis, all of which 

 are now known to occur in the Samoan Is. One of the groups with tufts on the 

 costal margin of the (Bosara Walker) extends to the Solomon Is. in a form 

 which I suppose to be a race of C. dilatata Walker (Borneo) and of which C. 

 pelopsaria Walker (Sula) is probably another race. Thamnocausta Warren, 

 with specialised oval patches in the <$ on the hind wing above and on the fore 

 wing beneath, is now known as occurring in the Bismarck Archipelago, speci- 

 mens of C. malachitis Warren (1903) having recently been received at the Tring 

 Museum from New Britain. The rest of the sections need not be noticed here. 



