142 THE GENERA OF BRITISH MOTHS, 
yellow with minute specks; the head being black, and the second segment pale brown. It feeds in May and 
June upon the foliage of several kinds of Willow, drawing the leaves together by a web. _The perfect insect 
appears in June and July, and is common almost everywhere. 
The genus Ditula. The insects assigned to this genus have the palpi projecting slightly beyond the 
head, the antenn of the male pubescent ; the body rather robust ; the fore wings rather more than twice as 
long as broad. The front of the fore wings is arched at the shoulder, and those of the male have a conspicuous 
‘fold at the base. There is but one British species, 
Ditula angustiorana (the Red Bar T, No. 15). The Caterpillar is described as greenish-gray, the 
head being dark green, It feeds on various trees and shrubs in April and May, and the perfect insect appears 
in July and August. It is common almost everywhere. 
The genus Pweilochroma, The insects assigned to this genus have the palpi longer than the head ; 
the wings are rather narrow, being about twice as long as broad, and deflexed when at rest. There are, however, 
considerable discrepancies in the species now assigned to this genus, and they are consequently arranged in 
three sections. The first section (having affinities with the genus Dituda) contains one species only. The second 
section (having affinities with the genus Zeiraphera of Curtis) also contains only one gpecies. The third section 
(having affinities with the genus Acal/a of Hiibner) contains four species. The fourth section (having affinities 
with the genus Astatia of Hiibner) contains four species. 
The first section (Ditula), Pwcilochroma profundana (the Oblique-barred T, No. 16). The representation 
is that of a typical specimen of this species, of which there are several distinct varieties, ten having been 
named at different times as distinct species. The perfect moth appears in June and again in September, being 
double brooded. It is common in the southern and midland counties. 
The second section (Zeiraphera) contains but one British species: P. corticana (the Cock’s-head T). 
The third section (Acalla) contains, P. ophthalmicana (the Black Double-blotched T), P. oppressana 
(the Obscure Blotch-back T), P. occudtana (the Dingy Blotch-back T), and P. signatana, (the Black 
Blotehed T). 
The fourth section (Astatia), contains P. Solandriana (the Solandrian T), represented at No. 17, and 
three other species. P. Solandriana, by some writers placed in another genus, is found in July and August. 
The larva is described as dirty white, with a tinge of green; the head and second segment black. It feeds on 
Hazel and Birch in May. The Moth is common almost everywhere. 
The other species in this section are P. Brunnichana (the Brunnichian T), of which there are many 
distinct varieties, P. stabilana (the Clouded Willow T), and P. Piccana (the Shining Pitch T). 
The genus Halonota. The insects assigned to this genus have the palpi longer than the head, the antenne 
simple, the fore wings rather more than twice as long as broad, and the front arched beyond the fold, in the male. 
This genus contains thirteen species, divided into the sections, 1. (Zpinolia,) containing two species, H. 
bimaculana, and H, cirsiana ; 2. (Epiblema,) containing eight species, H. seutulana, IZ. novana, H. Brunnichiana, 
H, turridana, H. Fenella, H. trigeminana, H. costipunctana, and H. tetragonana. The third section (Hemimene) 
contains three species, H. populana, H. nigricostana, and H. obscurana. 
Halonota scutulana (the Single Blotched T, No. 18). 1 have selected this species, belonging to the second 
section, to represent the whole genus, which it does very inadequately ; but the space of my work forbids 
farther illustration. It appears in June and July, and is widely distributed and rather common. The Caterpillar 
is described as bright pink, with the head and second segment black, and as feeding in the stems of Thistles in 
October, and in May, being double brooded. i 
The genus Anisotenia. The insects assigned to this genus have the antenne longer than the head. The 
wings long and narrow, the anterior pair being more than twice as long as broad; the front arched at the 
shoulder, and the front angle rather rounded. 
Anisotenia Ubnana (the White-barred Elm T, No. 19). The Caterpillar of this species is, as yet, 
undescribed, but the Moth, though not common, is very widely distributed, and appears in June and July. 
The genus Semasia. The insects assigned to this have the palpi longer than the head ; the antenne 
simple ; the anterior wings twice as long as broad, and their front angle rather rounded. The species are, 
