136 [November, 



Hah. : Hayling Island, Deal, Chobham. 



Sir Sidney Saunders possesses a ? without note o£ locality. In 

 the long unguicular spines the ? of this species resembles chalyheatus, 

 but the finely pilose dorsal valve of the 6th abdominal segment, the 

 row of many bristles above the margin of the clypeus, and the position 

 of the cubital f urcature of the hind-wing will distinguish it at once. 



Tachttes lativalyis. Thorns., Opusc. Eut., p. 242. 



(J . Black, punctured, abdomen with the base red, face densely clothed with 

 brilliant golden pubescence. 



This species, of which I have only at present seen the $ , is very closely allied 

 to our common species, peciinipes, but may be distinguished in the <? by having the 

 eyes more closely approximating on the vertex, by having the face, right up to the 

 ocelli, densely clothed with bright, almost orange-gold pubescence, the meso-thorax 

 more strongly punctured, and more or less clothed at the sides with very short 

 golden hairs, and the anterior femora and tibiae pale in front. It is also a rather 

 larger insect than pectinipes. Thomson says that the "^ may be easily known by the 

 much broader dorsal valve of the 6th abdominal segment, which is hardly one-half 

 longer than the width of its base, and by the unequal claws of the anterior-legs. 



Hah. : Sandhills, Deal : August, 1882. 

 Lloyd's, E.G. : September, 1883. 



ON HYPONOMEUTA RORELLUS, A GREaARIOUS "ERMINE" 

 WHICH FREQUENTS THE COMMON WILLOW (.SALIX ALBA). 



BY n. T. 8TAINT0N, F.R.S. 



This insect, which, in the perfect state, might readily be mistaken 

 for the common H. padeJIus of our hawthorn-hedges, is distinguished 

 at once in the larva state by its food : Salix alba (the common willow). 



Its general distribution throughout Germany had long been known 

 to me, but of late my attention has been drawn to its occurrence in 

 various localities in Holland. The geographical position of the Low 

 Countries, our nearest neighbour on the eastern coast, between the 

 latitudes of London and Hull, seems to render it extremely probable 

 that any Micros, which are widely scattered about Holland, should 

 also occur with us. 



In June, 1829, Heer Ver-Huell noticed that many of the willow- 

 trees near Rotterdam were disfigured by a great many webs of some 

 small gregarious larvae ; these larvae were full-fed early in July, and 

 the moths began to appear on the 23rd of that month. This notice 

 by Ver-Huell appears in the 5th volume of Sepp's work, p. 124. 



In the 1st volume of the " Bouwstoffen voor eene Fauna van 



