366 APPENDIX. 



from larvae taken from a small ornamental spruce growing in 

 the Chandlersford district. These Mr. Prout subsequently 

 identified as the true variaia^ Schiff. Apart from a general 

 greyer colouration, not always to be relied upon, the chief 

 points of difference are as follows : "true variata can nearly 

 always be differentiated at a glance by its better marked and 

 strongly dentate subterminal line (often very clear and pale) and 

 better marked hind wing, nearly always with a distinct central 

 spot, and not rarely with a fairly definite postmedian line'' 

 {Entom. xlv., pp. 241-246). The larva, which is almost identical 

 with that of obeliscata, feeds on spruce and not on Scotch fir. 



P. 178. Lampropteryx otregiata, Metcalfe. — In bring- 

 ing this forward as an addition to our Geometridse, the 

 Rev. J. W. Metcalfe {Eiitorn.^ 1917, p. 73) states, "I first 

 captured the insect some ten years ago, flying in considerable 

 numbers, in a remote locality in North Devon. The striking 

 difference in the shape of the wings from those of siiffimiaia^ 

 the small size, and the shining, silvery ground colour, at once 

 attracted my attention. A subsequent visit led to further 

 captures, and on coming to live in East Devon I was delighted 

 to discover it again in a similar locality in this part of the 

 county. In addition to this, Mr. Newman has now found a 

 series in a collection made in Cornwall, where he reports that 

 it was taken under similar conditions. 



" The species seems to be absolutely constant in form, and 

 in all specimens I have taken, well over a hundred, there has 

 not been the slightest variation nor any approach to any of 

 the known forms of siiffumata. The general pattern and 

 position of the wing markings correspond closely to those of 

 siiffumata^ but the dark markings are much reduced, especially 

 on the outer third of the wing, and are very delicately outlined 

 with silvery white. The small size, the shining, silvery, ground- 

 colour, and the shape of the fore wings, which are full and 



