24 CHLOKISSA. By L. B. Pkout. 



subcostal also runs into the costal, but tliis vein is very variable in the genus, and sometimes wanting. The 

 species are of small size, broad-winged, with very glossy scaling, sometimes tliinly scaled and more or less 

 translucent. The typical species are all Indo-Austrahan, and the only two Palearctic species which are best 

 referred here (on account of the stalking of the first subcostal) are somewhat anomalous, having more the shape 

 and facies of a Hemithea or Chlorissa. They might possibly be treated as aberrant, tailed Ghlorissa. 



mmidaria. D. ttiundaria Leech (2 e). Pale yellowish green (perhaps faded), the lines rather straight, whitish, the 



first dark-edged distally, the second proximally; the second is as usual continued on the hindwing. Hind- 

 wing with an elongate darker green discal mark. Under surface greenish white, without markings. West- 

 China: Ta-Ohien-Lu in June. 



elata. D. eluta Wilem. Smaller and with broader forewing than nnindaria, more nearly approximating to 



some of the typical Diplodesma, such as obnujita. Slightly darker than mundaria, the lines somewhat more 

 distinct, that of hindwing less straight. The less straight lines will also distinguish it from obnwpta. Distributed 

 in Japan, occurring from June to September. Also in Korea. 



24. Genus: dilorissa Steyli. 



Perhaps scarcely more than a subgenus of Hemithea, being somewhat connected by intergrades. The 

 abdomen is usually not crested, and never has more than two small crests. The distal margin of the hindwing 

 is either entirely rounded or at most quite weakly elbowed. Most of the other distinctions which separate the 

 tj^ical members of the two genera prove quite inconstant when wide material is investigated. The early stages 

 of Chlorissa are similar to those of Hemithea. The geographical distribution is very wide, representatives occur- 

 ring throughout the Palearctic Region, India, East and South Africa and North America. The genus is generally 

 called Nemoria, a name that rightly belongs to the North American bistriaria Hbn., wliich has no connection 

 with the present group. 



viridata. C. viridata L. (= prasinata Wrnbg.) (2e). Wings green, forewing with the costal edge yellowish and 



with two whitish transverse lines. Hindwing weakly angled at end of third radial, the margin straight, or even 



very shghtly excised, from here to first radial, colour as in forewing, with a single, Uttle bent transverse line. 



caerulesnens. Under surface somewhat paler, with the postmedian Une only, sometimes almost unmarked. — ab. caerules- 



conea- ceils Burr, is of a bluer green colour. — ab. concavilinea Burr., which is probably scarcely worth distinguishing, 



vihnen. has the postmedian line on hindwing incurved. — ab. olivaceo-marginata Burr, has all the fringes dark olive- 



marginata. g^een. — ab. rufotincta Burr, has a delicate red flush on the centre of the forewing. — ab. mathewi Bankes 



rufotincta. has both wings dusted with orange scales. — ab. rosearia Culot, which probably differs Kttle from the preceding, 



mathewi. jg (described as having the wings pale rosy throughout. The last thi"ee aberrations, though founded on fresh 



(in part even on bred) specimens, are probably due to some subtile chemical action on the fugitive green colour. 



melinarici. — melinaria H.-Sch., described from a single example from the Ural, is a somewhat enigmatical form, but 

 seems best referred as an aberration to viridata, which in any case occurs about Orenburg, in a form which 

 I cannot differentiate from that of western Europe, melinaria is smaller than the type form, more bluish, with 

 the hues more nearly approximated. There is in the British Museum a specimen bred by Zellbr, and labelled 

 by him as melinaria, agreeing with the above description, but unfortunately without locahty. It is very doubt- 

 ful whether some other specimens which have at times been identified under this name really belong to it. — 



imignata. insignata Stgr. (5 a) from Turkestan, is distinguished by the scarcely elbowed distal margin of the hindwing 

 and the almost obsolete white lines. The egg of viridata is similar to that of Hemithea. Larva also similar to 

 aestivaria but of simpler structure, lateral flange less developed; green, with reddish dorsal line or diamond- 

 shaped spots, partly edged with white. Feeds on hawthorn, sallow, heath, Potentilla and various other plants. 

 Pupa pale brown, with blackish dorsal line and spiracular spots, hibernating in a sHght cocoon among fallen 

 leaves. The moth appears in May and June, and is locally common, resting by day among low plants or 

 bushes, and becoming more active in the afternoon. Its range, so far as is ascertained, embraces most of 

 temperate Europe, Asia Minor, Armenia, etc., and perhaps some locahties in Central Asia; but it has been 

 much confused with some of its nearest relatives. 



doraria. C. cloraria Hbn. (= porrinata Z.) (2e). Very closely related to the preceding, being scarcely distinguish- 



able except in having the costa and front leg more or less thickly spotted with fuscous. The ground colour 

 is perhaps on an average shghtly more bluish, and the postmedian line more curved. Structurally also, Btje- 

 Rows (in htt.) tells me that the cj genitaha differ in that the „socii" (two organs which lie alongside the uncus) 



