1^2 [November, 



perfect insects are not often seen ; they fly at dusk in the neighbour- 

 hood of their food-plants. 



Four species are at present known to occur in England, which I 

 propose to tabulate thus : — 



A. Fore-wing with J'alcate apex. 



a. Inner margin with ybwr teeth of scales 1. cheer ophyllellus. 



h. Inner margin with iwo teeth of scales 2. Illigerellus. 



B. Fore-wing with rounded apex. 



a. Inner margin with ybwr teeth of scales 3. daucellus. 



h. Inner margin with two teeth of scales 4. insecurellus. 



1. chmropTiyllelUs, Goetze, iii, 4, 169, 292 ; St., I. B., 234, Man., 2, 397 ; Frey, 



Tin., 267, Lep., 401 ; Hein., 411 ; Snell., 947 ; = testaceella, Hub., 326 ; 

 Z., Isis, 1839, 211 ; H.-S., v, 47 and 213 ; Dup., iv, 75, 9 ; = fasciculellus, 

 Stph., 111., iv, 218, 39, 1 ; Wd., 1234. 



Fore-wing variable in colour and distinctness of markings, ashy-grey, more or 

 less tinged with ochreous. From the inner margin near the base a purplish-grey 

 indeterminate fascia runs obliquely, first to the middle of the wing, and thence 

 broader and darker to the costa ; on its outer edge stands a short black dash, at each 

 end of which is a white dot ; beyond it before the apex a longer black dash, pointed 

 towards the base, and preceded by an angulated pale fascia. Along the costa are 

 sundry small black dots, and before the apex along the hind margin two or three 

 white ones. The teeth of scales are brown or black : the first and largest stands at 

 the rise of the dark fascia ; the second, smaller, in the middle of the inner margin ; 

 the third and fourth, quite small, being close to one another. Fringes with two 

 (not three, as Heinemann says) blackish dividing lines, diverging, and vanishing 

 before the anal angle. Below the apex the outer of these dark lines is strongly bent 

 inwards towards the inner one, so that the fringes immediately below the apex 

 become pale and unmargined, and, in consequence, the wings appear to be more 

 falcate than is really the case. 



Sometimes the whole fore-wing is dark grey or reddish-brown, with the fascia 

 very obscure. 



The summer brood is on the wing in July and August, the second 

 emerges in October. 



Larva gregarious, yellowish- or greenish-white, with a whiter 

 dorsal vessel and brownish spots, glassy looking ; head pale brown. 

 On various Umbelliferae, especially Heracleum sphondylium and Pasti- 

 naca sativa ; feeding on the under-surface of the large lower leaves 

 beneath a slight web, and pupating among rubbish on the ground. 

 The first brood, which, according to Mr. Stainton, is much less nume- 

 rous than the 2nd, is full fed in June, the second in September. 



2. Illigerellus, Hiib., 333 ; Tr., ix, 2, 32 ; Dup., xi, 294, 1, p. 204 ; St., I. B., 234, 



Man., 2, 397, N. H. T., xii, 96 ; Ev., F. V. U., 576 ; Frey, Tin., 268, Lep., 

 401 ; H.-S., v, 207 ; Hein., 409 ; Snell., 847 ; = falciformis, Haw., 555 ; 

 Stph., 111., iv, 221 ; Wd., 1241. 



