76 NOVITATKS ZOOLOGICAE XXV. 1918. 



NEW SPECIES AND FORMS OF GEOMETRIDAE. 



By LOUIS B. PROUT, F.E.S. 



A. HfDO-AUSTSALIAN. 



SuBFAM. HEMITHEINAE. 



1. Dysphania translucida ab. xanthora ab. nov. 



Dysphania cyane ab. xanthora Warr., MS., in coll. Tring Museum. 



<J ?. All the white parts bright yellow, only a little paler in the centre of 

 the forewing, and usually in the cell of the hindwing. In addition, there is a 

 very general tendency, especially in the 2, for the sub'narginal yellow spots or 

 bands to broaden, on the hindwmg sometimes leaving only a narrow apical 

 patch and a few very obscure posterior spots dark, on the forewing sometimes 

 running along the veins to the terraen. 



Woodlark I., fairly co-nmon, together with the name-type (translucida 

 Jlontrz., Ann. Soc. Agric. Lyon (2, viii. 409). Also a few from St. Aignan. 



Might have been taken for a separate species, or for a modification of 

 numana Cram., but for the presence of occasional, though rare, intermediates. 

 I am inclined to suspect that numana Cram., tentans Walk., translucida Montrz., 

 siibalbata Warr. and very likely tyriavthina Butl. are all races of one very widely 

 distributed species. It is not a little curious that one of the most westerly 

 for.ms (numana, Amboina) should most closely resemble an aberration only 

 found in the extreme east of the range of the collective species or group. 



2. Berta angustimedia sp. nov. 



(J, 28 mm. Structure and form of acte Swinh. (Hindlegs lost.) 



Forewing with the white markings much more extended than in acte ; basal 

 area spotted with white ; the fine interrupted line which, in acte, separates the 

 proximal from the median area replaced by a slightly interrupted, partly double, 

 band of white lunules, recalling that of ckrysolineata \\'alk. ; median area nar- 

 rowed, especially behind, its anterior half predominantly filled in with white, 

 only remaining green at its edges, in an 8-shaped mark about the discocellular.s 

 and slightly in subcostal region ; postmedian white line deeply inbent and 

 thickened between the radials and especially posteriorly, where it is in conse- 

 quence markedly farther re;r.oved from termen than in acte ; distal area largely 

 white, with irregular olive-green spots and streaks. Hindtciiig with corre- 

 sponding extensions of the white markings. 



Khasia Hills, May 1896. Type in coll. Tring Museum. 



A ? paratype in coll. Swinhoe, also from the Khasia Hills, shows the third joint 

 of the palpus to be longer than that of acte ? and has the white in the median 

 area of the forewing even more extended, forming in addition two patches in 

 the cellules between M' and SM'. 



