158 BRITISH LEPIDOPTERA. 



two fairly distinct forms included under this name, we would use two 

 names for these. There can be no doubt, from Scopoli's description, 

 that his name is applicable to our (more or less moorland or heath) 

 British form. This appears to be the form generally found in 

 northern Europe. The second is, as a rule, larger than the first form. 

 It has sometimes, in addition to the outer costal spot, another smaller 

 spot just within it, often in contact with it. It is the form generally 

 obtained in South France, Italy, Switzerland, and parts of Germany. 

 This latter form, we suspect, from the Fabrician statement, " macu- 

 lisque ejusdem coloris versum apicem," to be allionella, Fab. The 

 Fabrician type, too, came from Italy. We thus have two chief forms : 



1. Anterior wings purple, with two golden fascite, one towards the base, the 

 other towards the centre, and a costal spot of the same colour towards the apex = 

 aureatella, Scop. 



2. As 1, but sometimes with an extra costal spot or point just within the first 

 costal spot = allionella. Fab. The diagnosis of the latter reads : " Alee anticse 

 cupro-auratae, nitidse fasciis duabus, altera baseos, altera in medio flavissimis maeu- 

 lisque ejusdem coloris versum apicem. Habitat in Italia, Dr. Allioni " [Fabricius, 

 Ent. Syst., iii. (2), 321, no. 148 (1794)]. 



EGG-LAYING. At the end of March, 1897, Chapman met with this 

 species near Cannes, and imprisoned several of the females with damp 

 moss, and succeeded in obtaining eggs in the same way as had been 

 done in the case of M. calthella. 



OVUM. The eggs are a little larger than those of M. calthella, 

 they are similarly clothed, with the snowy exudation forming white 

 filaments. 



LARVA. The young larva does not differ to any appreciable extent 

 from that of M. calthella. It is somewhat larger, and less delicate in 

 consequence, and is also, perhaps, whiter in colour. The larva) 

 appeared to eat a little moss, as evidenced by the coloration of their 

 intestinal contents, but owing to Dr. Chapman travelling at the time, 

 they all died off. The following is a description of the newly-hatched 

 larva : It is about *95 mm. in length, and of the same truncate angular 

 outline as that of M. calthella. The antennas are similarly very 

 long, and the true legs, and 8 pairs of false legs, have the same 

 structure and relative size as in M. calthella. On the first seven 

 abdominal segments there are 10 rows of ball appendages. These 

 occur in double rows, a double row on each side of the dorsum, and a 

 double row on each lateral region, and a double row again on each 

 side below this, such that the upper one is a ball like the others, the 

 lower is one of the false feet, i.e., if the false feet are taken to be repre- 

 sentative of the balls there would be 12 rows, 10 rows of balls and 

 two rows of feet, only that the two rows of feet do not form a double 

 row of themselves, but appear to be the lower members of the double 

 row of which the lower row of ball appendages is the other. The 

 reason for taking the appendages thus in double rows is that there is 

 a greater distance from one double row to the next than between the 

 two rows of which it consists. The 1st thoracic segment has two 

 rows transversely, 4 in the first and 3 in the second on either side. 

 The second and third thoracic have the two upper pairs of rows on 

 either side as in the following segments, but, on each, the lower row, 



* The notes on the early stages of this species were made by Dr. Chapman 

 from specimens taken at Cannes, April, 1897. These belonged to the form 2, 

 sometimes with an extra spot between the central fascia and the ordinary costal 

 spot towards the apex = allionella, Fab, 



