THE GENERA OF BRITISH MOTHS. ° 171 
The other specis are P. cruciferarwm, the Turnip pest, P. porrectella, and P. Dalella, which are all very 
prettily marked. 
The genus Cerostoma. The insects assigned to this genus, as characterised by Mr. Stainton, have the 
maxillary palpi distinct, and the second joint of the labial palpi prolonged beneath into a tuft ; the terminal 
joint being erect and pointed. The fore wings are rather long, and sometimes hooked, and the hind wings have 
rather long fringes. The Chrysalis is formed in a close cocoon, very distinct in character from the open one of 
the last genus. There are twelve British species. 
Cerostoma asperclla (the Chequered Hook-tip, No. 9). This is the rarest as well as the handsomest of the 
eenus. The Caterpillar feeds on the foliage of the Apple in June, and the perfect insect appears in July, and for 
some time afterwards. It was formerly taken at Glanville’s Wootton, near Sherborne, but it appears to be sought 
for in vain by recent collectors. 
Cerostoma Xylostella (the Honeysuckle, No. 11). The Caterpillar of this remarkable and very handsome 
species feeds on the Honeysuckle, in May. It is a pale yellowish green, with a broad dull red stripe along the 
back. The perfect Moth appears in July and August, and is very abundant in gardens in all parts of the country, 
The other species are—C. sequella, C. vittella, C. radiatella, C. costella, C. sylvella, C. alpella, C. lucella, 
C. horridella, C. scabrella, and C. nemorella, several of which are rather rare and very pretty insects. 
The genus Theristis. The insects assigned to this genus differ by the larger tuft of the palpi, and by the 
more pointed fore-wings, and the much deeper fringes of the hind-wings. There is but one British species. 
Theristis cwudella (the Narrow-winged Veneer, No. 10). The Caterpiliar of this conspicuous species is 
greenish gray, marbled with a brownish tone, and having a white line down the back, and the third and fourth 
segments being distinguished by conspicuous black spots. It feeds on the Spindle in May, and the perfect 
insect appears in August and September, after which it appears to hybernate, appearing again in April. It has 
been recently taken at Cambridge, Lewes, Bristol, Dartford Heath, and other places. 
