. Catalogue of Lepidoptera Phalaenae in the British Museum. Moths. 80 Subfamily LITHOSIAXiE. I'rohoscis usually well developed, but often aVtortcd ; jtalpi usually short and porrect, sometimes reaching well beyond the frons, often upturned, rarely reaching above vertex of head; antennae of male usually with bristles and cilia, often bipeetinate, sometimes diluted or with tuft of scales on upperside of shaft; ocelli absent; tibite with the spurs usually moderate, sometimes long or absent. Pore wing tyi»ieally long and narrow, but in a large section short and broad, the narrow-winged
. Catalogue of Lepidoptera Phalaenae in the British Museum. Moths. 80 Subfamily LITHOSIAXiE. I'rohoscis usually well developed, but often aVtortcd ; jtalpi usually short and porrect, sometimes reaching well beyond the frons, often upturned, rarely reaching above vertex of head; antennae of male usually with bristles and cilia, often bipeetinate, sometimes diluted or with tuft of scales on upperside of shaft; ocelli absent; tibite with the spurs usually moderate, sometimes long or absent. Pore wing tyi»ieally long and narrow, but in a large section short and broad, the narrow-winged genera having vein 5, and often vein 4, absent. Hind wing with vein 8 coincident with the cell tVoni base to one-third or to near end of cell. The more generalized forms of Lithusiance have a very slightly nioditied venation in the fore wing; in Didwia all the veins arising from the cell except 7, 8 ; and the subfamily probably has its origin in an early Antid form which was related to Avoatia and its allies in the yocUiuhf. The normal evolution of the venation seems to have been that 7, 8 and 9, 10 should become stalked, that 9 should then anastomose with 8 to form an areolc, which in most of the genera has dis- appeared by reduction, leaving vein 9 stalked with 7, 8; in the genus Ikma especially the areole being often either present or absent in different specimens of the same s])ecies. The genus Jkvnasa presents in the male a most extraordinary modification of the hind wing, which is probably unique in the Lepidoptera, the whole wing being reduced to a minute lobe below the base of the fore wing, except the inner area, which is largely developed, appearing at first sight like a normal hind wing, but in reality rotated at base, the upperside becoming the functional un lerside and the inner margin the functional costa. The Lithoskaue as a group present great variety of s ructure as. Fig. 25.—Larva of Phihgria cntella. (From Moths Ind. vol. ii.) regards both venation and sec
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectmoths, bookyear1913
