312 THE MOTHS OF THE BRITISH ISLES. 



The caterpillar is of a faint bluish green, inclining to greenish 

 white on the back ; a row of black spots along the back, and a 

 broken black narrow stripe along each side. It feeds on tree 

 lichens {Usnea barbata)^ etc., from September to June or July. 

 Three figures of this caterpillar are given on Plate 133, Fig. 3. 



The moth is out in July and August, and may be found at 

 rest on tree trunks now and then, but is more frequently obtained 

 by jarring the lichen-clad branches of oak. Although it is 

 known to occur very locally and somewhat rarely in the counties 

 of Wilts., Dorset, and Devon, the New Forest in Hampshire is 

 the English district where one is most likely to meet with this 

 species. It has been recorded from Cornwall (Falmouth 

 district, 1904), Hereford, Pembrokeshire, Carnarvonshire 

 (Beddgelert), and Cumberland. Charlton Forest, Sussex, has 

 also been mentioned. In Scotland, Renton states that it is 

 generally common in Roxburghshire ; it occurs in several of 

 the woods in Clydesdale, and has been noted from Argyllshire. 



The Engrailed {Tephrosia bistortata). 



In the following brief remarks on T. bistortata^ Goeze 

 ( = biu?ididarta>f Borkhausen), I have included reference to 

 crepuscularia, Hiibner ( = biundularia, Esper). The former 

 (which is also named abietaria, Haworth, 2Lndi laricaria, Double- 

 day) appears on the wing in March and April, and there is a 

 second flight in July and August. Moths of the second genera- 

 tion are few in number and small in size, and are referable to 

 abs. consonaria and strigularia^ Stephens. A third generation 

 of still smaller moths has been reared. Crepiisadafia is out in 

 May and June, rarely in April ; its caterpillar feeds in June and 

 July or later ; according to Barrett, a second generation of the 

 moth has occurred in August. One or two moths have been 

 captured in September or October, but whether these were 

 referable to bistortata or crepuscularia is not quite clear. 



By some authorities the double - brooded bistortata is 



