JQ4 BRITISH MOTHS 



in the shape of its triangular wings, but also in the form of its short thick larva. The median vein emits 

 four branches. 



Boisduval unites the type with rosea, forming them into his fourth section of Lithosia. The differences, 

 however, between mesomella and rosea appear to warrant their generic separation. 



SPECIES 1.— CYBOSIA MESOMELLA. Plate XX., Fig. 25. 



SvNoNVMEs. — Phalwna [Tinea) mesomella, Linuajus; Turton ; 

 Boisiluval. 



Lithosia ehorinay Fab. ; HUbner; Ochsenbeimcr ; Stepbens ; 

 Hawortb ; Wood, Ind. Ent. pi. 8, fig. 109. 

 Lithosia lutarella, Uaworth (variety). 



This species measures from ^ to 1^ inch in expanse. The head, fore and apical margins of the fore wings, 



and ciliaj of all tlie wings, are luteous ; the remainder of the fore wings palc-dovc coloured or yellowish, each 



with two small black spots, the hind wings are brown ; and the remainder of the body is whitish. The caterpillar is 



tliick, and of a grey colour, with a reddish head. The moth appears in June and July, and is not rare in the 



woods round London. 



PIIILEA Dai.man. (Zetterstedt. SETINA, p. Stephens. ) 



This genus is at once distinguished by the semitrausparency of the short, triangular, yellow-coloured wings ; 

 the palpi are three-jointed, but minute ; the antennas are setaceous and simple in both sexes, being, however, 

 slichtlv ciliated in tlie males ; the spiral tongue is moderately long. The caterpillar is short and thick. 



to • 



The females are smaller than the males. 



SPECIES 1.— PHILEA IRRORELLA. Plate XX., Fig. 22, 2.3, 24. 



Synonvmes. — Phalcena { Tinea) irrorella, LiiiD. ; Tuiton. , lU., vol. '2, pi. 17, fig. 1 ; Wood, lud. Ent. pi. 8, fig, 10" ; Zetterstedt 



Eudrosa irrorella^ Hiibner, Vcrz. bck. Schm. t (Phileai.). 



Romhyj: irrorca, Hubner ; Ocbscnheinier ; Godart ; Stepbens, t LitJiosia irrorata, ¥:i\i\\rm^\ Hawortb. 



This pretty insect varies from i to 1^ inch in expanse. The wings are of a luteous colour, the anterior 



marked with three rows of small black dots placed obliquely across the wings ; the body is black, with the 



thorax in front and the extremity of the body fulvous ; the hind wings arc also marked, ne.ar the outer angle, 



with two or three black dots. A singular variety, having the black dots transformed into marks resembling 



the letters IVI, was captured by Professor Henslow. The caterpillar is described by Zetterstedt as black and 



hairy, with rhomboidal, dorsal, and oblong lateral spots of a pale colour, and as feeding upon lichens. The 



moth appears in June and July, and is a rare species, although it has occasionally been taken in some plenty in 



the South of England. 



SPECIES 2.— PHILEA ROSCIDA ? 



SvNONVMEs. — Lithosia roseida, Fabricius ; Hiibner ; Stephens; Wood, Ind. Ent., pi. 8, tig. 108. 



This species varies from -> to an inch in expanse, and appears to be very closely allied to the preceding, from 

 which, however, it is regarded as distinct by Ochsenheimer, Boisduval, &c. The body is black, with the front 

 of the thorax and tip of the abdomen luteous ; the fore wings are of a dull-pale clay colour, with three rows of 

 black spots ; and the hind wings have several dusky dots near the outer angle ; the shaft of the antennae 

 is black ; the four fore legs are blue-black above, and yellow beneath. Taken, but very rarely, near 

 Croydon, Surrey. 



