134 PERINA; PORTHESIA. By Dr. E. Strand. 



jonasi. T. jonasi Bull. (1911), from Japan, is light sulphur-yellow on the forewing with large brown 



discocellular spot lighter in the centre, and a reddish brown longitudinal costal marginal spot at the apex, 

 which at its inner end is prolonged into a sharp point posticad and inwards. Hindwing silky white, yellowish 

 distall}'. Body white, thorax yellowish, head and teeth of antennae orange. Palpi, tibiae and tarsi ochreous. 

 Wings beneath sulphur-yellow, forewing with ochreous costal margin and dull orange-coloured apex of the 

 costal area. 25 — 40 mm. — Plate 19 h 4, represents a very large ^ which according to observations by Prof. 

 Seitz flies at the same places as the small form of jonasi and seems to be a seasonal form; I name it 

 gigantea. gigatitea jorm. nov. 



23. (Jdiiis: Perina Walk. 



A small South- and Eastern-Asia.tic genus which stands rather isolated in some respects. The 

 (J (J have very tiny palpi and long narrow forewing with a very long oblique margin, veins 4 and 3 on a 

 short stalk, while 2.3 originates from the hind angle of the cell and 7 and 8 from towards the apex. On 

 the hindwing also 4 and 5 are stalked, while 6 is absent. In the $ the distal margin of the forewing is less oblique, 

 veins 4 and 5 originate from the ape.x of the cell and 6 is present. 



nuda. P. nuda F. (21 d). ^ with orange-coloured head and legs, black antennae and greyish brown body, 



abdomen with white transverse lines, anfil tuft orange, forewing hyaline v^dth the inner basal area clothed with 

 brown scales, hindwing dark brown with hyaline apical area. The $ light ochreous with orange anal tuft. — Lar- 

 va greyish green with short black dors<)l brushes and longer pencils at both ends of the body, as well as 

 gieyi.sh black lateral tufts; above a green longitudinal band with white line and led spots. Pupa greenish, 

 beneath spotted with reddish brown and black. ^J 38, $ 50 mm. China, Japan, India, Ceylon. 



24. Genus: I*ortliesia Stefh. 



This genus, distributed over the whole old A^orld, but not rich in species, is closely allied to Euproctis, 

 but easily distinguished from it by the absence of vein 5 in the hindwing. 



similis. P. sitTiilis Fuessl. (21 i) is white, and very like Euproctis chrysorrhoea, but more pure silky white, 



anal wool and hairs at the apex of the abdomen of the $ golden yellow. In Central and South Eastern 



Europe, absent from the Southern Balkan Peninsula, but distributed in South Italy, Armenia, Altai, Amurland, 



Corea, Japan and China. — Not rarely, especially in the (J sex, varieties occur with small dark spots on the 



aurifliia. forewing: auriflua (F.) Hbn. has three spots at the inner angle, forming an oblique transverse row, and one spot 



nyctea. in the basal area near the hindmargin; nyctea Gr.-Grsh. has only one spot at the inner angle as well as 

 irimaculatit. one in the basal area like auriflua; trimaculata ab. nov. is like nycten. but has another spot on the 



quadri- oostal margin opposite the subbasal irmer marginal spot , while quadrimaculata ab. nov. has a fourth 

 maculaia. subapical spot. The two last-named forms are from Eastern Asia, where spotted specimens of this species 

 seem on the whole to be commoner than in Europe. — Larva black, with sparse black grey hairs, 

 a brick-red divided longitudinal dorsal stripe, white lateral stripes and black head, segment 1 black streaked 

 with yellow, the tubercles on segments 4 and 11 also black. The larvae disperse soon after emerging from the 

 eggs, which are covered with the anal wool of the $, hibernate singly and pupate at the beginning of June. Pupa 

 blackish bro^vn in a whitish cocoon. Moths from the end of June until August common everywhere in the 

 distribution-area, but not in such numbers as the very similar Euproctis chrysorrhoea, and. not noxious. The 

 moth comes to the light and when at rest folds the wings veiy steeply in roof -shape; when touched it feigns 

 death, lying on its side with the \iangs closed. 



melania. P. tnelatiia Stgr. (22 h), from Mesopotamia, Kurdestan and North-Eastern Asia Minor, has white wings 



with rather broad black band before the outer margin partly separated into spots, light ochreous brown an- 

 tennae and in the (J deep dark brown abdomen with brownish white anal tuft, in the $with ochreous brown 

 anal tuft. On the underside the costal margin of the forewing is slightly suffused with darker as far as 

 beyond the centre. Head, thorax and legs white, palpi blackish. Abdomen beneath white in both sexes, 

 suffused with dark above in the $, especially distally. ^ 25 — 30, $ 35 mm. — Sometimes (in the $ always ?) 

 melaniodes. the forewing bears a black irmer marginal spot (melaniodes ah. nov.). 



rebeli. P. rebeli Haberh. is said to be very similar to Euproctis karghalica. At the apex of the cell there are 



three black dots, the middle one of which is larger than the other two. Without marginal spots. 30 — -32 mm. 

 Larva 12 nun long, with black hair, at the head two long grey tufts of hair, on both sides a white stripe, 

 white rings on segments 1 and 2, a black hairy tuft on segment 3, from which a red stripe runs to the end- 

 segment, being divided by long black hairs. Legs reddish brown. Lives in May on Palarius austrialis near Slivno. 



xatifhnr- p. xanthorrhoea Koll. (= subdita Moore) (23 a). ,^ white, slightly suffused with darker, hindwing 



r K/ca. ^yitii a broad (especially costally) but not sharj)ly defined blackish marginal band ; anal tuft orange ; pectinations 



