GEOMETRID^—GEOMETRA. 281 



but has been once recorded in Derbyshire, and rarely in 

 Warwickshire and Staffordshire ; found also locally in 

 Cheshire, Lancashire, Yorkshire, and Cumberland, and seems 

 recently to have spread along railway banks into Durham. 

 Probably to be found throughout Wales, since it is recorded 

 in the northern portion, and at Swansea, and I found it not 

 uncommonly in Pembrokeshire. In Ireland it is generally 

 distributed and common, but in Scotland it seems to be 

 limited to the south, not extending beyond Perthshire. 



Abroad it is common in Central and South-Eastern Europe, 

 Spain, Italy, and Bithynia ; moreover, a large greenish-white 

 form, called var. simpUx^ from Western China, is believed to 

 belong to this species ; if so, it has most probably a consider- 

 able Asiatic distribution. 



Genus 2. GEOMETRA. 



Antennae of the male shortly and stoutly pectinated almost 

 to the tip ; head downy ; thorax covered with very soft raised 

 hair-scales ; abdomen long, moderately slender, without dorsal 

 tufts, smooth ; fore wings broad and bluntly pointed, faintly 

 crenulated ; hind wings large, rather elongated, crenulated. 



We have but one species. 



1. G. papilionaria, Z. — Expanse 2 to 2i inches. An- 

 tennae white, thorax rather thick, green ; fore and hind 

 wings broad and ample, faintly crenulated behind, rich full 

 green, each with one or more rippled white transverse lines ; 

 abdomen silky-white. 



Antennas of the male pectinated with solid curved ciliated 

 teeth of a pale brown colour, almost to the apex, shaft white ; 

 palpi small, but the tips prolonged and a little upturned, 

 green ; tongue well developed ; face, head, and collar rich 

 green ; thorax rather broad, rough with long soft loose 

 scales, rather paler green ; abdomen not very slender, smooth, 

 silky-white with the faintest possible tinge of bluish-green ; 



