CHAULIODUS. 233 
labiales mediocres, crassiusculi, recurvi, articulo secundo subclavato, 
terminali multo breviore, subacuto. Haustellum breve, nudum. Ale 
longe ciliate, anteriores elongate, ix dorso squamato-dentata, pos-— 
teriores lanceolate; anteriores: cellula secundaria indicata; vena 
apicalis furcata supra et infra apicem exit, infra eam rami quinque ; 
submediana simplex ; vena subdorsalis brevis, furca subobsoleta ; pos- 
teriores: cellula costalis valde angustata: cellula mediana clausa in 
costam unicam, in marginem posticum quinque venas emittit, inter se 
non connexas. 
Head smooth; the forehead obtuse. Antenne longer than the ab- 
domen, setaceous, with rather short, closely set joints (the basal joint 
short), with short hairs. abial palpi of moderate length, rather thick, 
recurved ; the second joint subclavate ; the terminal joint much shorter, 
rather acute. Tongue short and naked. Wings with long cilia, the 
anterior elongate, with tooth-like projections of scales on the inner margin, 
the posterior lanceolate. In the anterior wings the secondary cell is 
indicated ; the fureate apical vein terminates above and below the apex, 
below it are five veins; the submedian vein is simple; the subdorsal 
short, with a rather obsolete fork; in the posterior wings the costal 
cell is extremely narrow, the closed median call emits one vein to the 
costa and five separate veins to the hinder margin. 
Of this genus we have three species; several others are known 
to occur on the continent. (One of our species, zwseewrellus, shows 
a slight discrepancy in the neuration of the wings; the apical 
vein of the anterior wings being simple, and below it are siv 
veins; the apex of the submedian is also thickened.) Little is 
known of the habits of any of the species except Cherophyllellus ; 
this is double-brooded, the larva feeding at the end of June and 
beginning of July, and in September, on several species of Um- 
bellifere ; they generally occur in companies of rarely less than 
ten on a plant, sometimes as many as fifty; when very young the 
larvee mine the leaves, but when more fully grown they come 
from within the cuticles, and devour the lower half of the leaf, 
the upper portion consequently becomes discoloured and turns 
brown, The larvae spina number of small threads about the plant 
on which they feed, and these threads are covered with a glutinous 
secretion which collects in minute globules, reminding one, as De 
Geer expressed it, of a spider’s web in a fog. When the larva is 
full-fed it spins an open network cocoon and changes therein to a 
upa. ‘The perfect insect appears towards the end of July and 
Heaths of August, and in October; the latter brood is far the 
most numerous, but the specimens are more retired in habit, 
and are rarely met with till the spring, after hybernation, and of 
course in wasted condition. ‘The perfect insects of the summer 
brood may sometimes be met with flying on calm evenings, with 
VOL. II. 2u 
