FH 1 -CITIDAi-A CRO BASIS. 1 1 



mediate portion bowed well outward, and upon this bow three 

 times toothed, these teeth being- most distinct on an interior 

 edging of cloudy black ; hind margin smoky purplish-grey, 

 with r faint row of black dots closely followed by a similar 

 marginal line; cilia glossy, concolorous. Hind wings 

 moderately ample, rounded behind, shining smoky-brown, 

 the cilia rather whiter and brilliantly glossy. Female similar, 

 but the antennre quite simple. 



Underside of the fore wings golden smoky-brown ; a large 

 rufous patch at the apex is divided by a black line ; hind 

 wings very similar, both edged by a dark brown marginal 

 line. Body and legs pale golden-brown. 



On the wing in July and the beginning of August. 



Larva and pupa not certainly known. 



The moth frequents old oak trees, flying about them at dusk, 

 and coming to sugar on their trunks later at night, but is- 

 very little known here, and indeed seems hardly to be recog- 

 nised anywhere. The remarks of the late M. E. L. Kagonot, 

 in the twenty-second volume of the Entoviologisf's Monthhj 

 Magazine, upon the species of this group, though evidently 

 worked out with great care, do not altogether make the dis- 

 tinction clear, and he does not appear to have at all recognised 

 the present species, which, as it seems to me, is clearly 

 Hiibner's insect. 



It was discovered in this country in the year 18.5« by my 

 late colleague, Mr. Robert McLachlan— who fully condoned 

 his subsequent desertion of the Lepic/opkra, by world-wide 

 work among the Xeumptcm and Trichoptcra—B.hout oak trees 

 in the immediate neighbourhood of Forest Hill, in the out- 

 skirts of London, and close upon the boundary of the counties 

 of Kent and Surrey. Here he took specimens in some 

 numbers in different years, and to him I am indebted for 

 those lent for use in this work. Subsequently others were 

 obtained by the late Mr. Howard Vaughan, but I do not find 



