Entomological Society. 2713 



species appear very early in the seascm,-for instance, purpurea in Februwy, J and 

 unimaculella and semipurpurella in March,-and it is exceedingly probabl e : tha .other 

 eqnally early species lurk undetected. From the affinities of the group to the Adds, 

 the larva, of which are known to be case-bearers feeding on various plants there is 

 little doubt that the larva, of these insects feed in a similar way; and it those 

 collectors who take Calthella in plenty would devote a little of their time to the fur- 

 therance of science, by searching for the lame and pupa, of that insect, thougl > they 

 might not enrich their collections by so doing, they would have a better clam to the 

 title of entomologists. 



A. Head ferruginous. 



1. Calthella, Linn. Anterior wings golden, with the base entirely purple. 



Frequents Caltha palustris, in May. 



2. Aruncella, Scopoli. ? Anterior wings golden, with the base purple on the costa , 



$ with two fasciae and a spot silvery. 

 Not scarce, in June and July. _ 



3. Allionella, Fabr. Anterior wings purple, with two golden fasciae, and a golden 



spot towards the apex reaching neither margin. 

 Scarce, in May and June. 



4. Subammanella, Stainton, Catal. Tin. p. 9. 



5. Rubrifasciella, Haw. Anterior wings greenish golden, with a reddish spot on the 



costa at the base, a reddish fascia before the middle, and another bifurcate be- 

 yond the middle. 



B. Head not ferruginous, 

 a. Head cinereous. 



6. Subpurpurella, Haw. Anterior wings greenish golden, with a faint paler spot to- 



wards the anal angle. 



Common, on oaks, in May. , . , , ,j 



7. Semipurpurella, Steph. Anterior wings purple, irrorated with pale golden, an- 



tennae more than half the length of the anterior wings. 

 Common, on birches, in March and April. 



8. Sparrnannella, Fabr. Anterior wings golden, with numerous transverse purple 



fasciae. 



Scarce, on birches, in May. 



/3. Head dark fuscous ; antenn<e less than half the length of the anterior wings. 



9. Purpurella, Haw. Anterior wings golden, with numerous irregular purple fascia, 



and the veins purple. 



Common, on birches, in February and March. 

 10. Unimaculella, Zetterstedt. Anterior wings golden purple, with a conspicuous 

 whitish spot at the anal angle. 

 Scarce, in March and April. 



The difficulties in the genus commence with semipurpurella, which in my Cata- 

 logue I have lumped together with purpurella and unimaculella as one species : these 

 are, however, truly distinct, and with fine specimens they are easdy separated though 

 iu die ordinary run of specimens found in collections it is no easy matter to say to 



