THE YOUNG NATURALIST. 203 



species in flowers of dog-rose, on several hedges in the neighbourhood ; 

 one especially good locality is the lane at the back of Bun's farm. 

 I have also found it in the same locality, in gardens, on moss roses. 

 This same locality is referred to by Mr. South (" Entomologist." 

 XVIII., p. 97), who had not then met with the species there since 

 1878, but in Vol. XVIII., p. 277, Mr. South records the capture of 

 five larvae in one of its old localities. 



This species is, at present, therefore, one of our rarest species, and 

 that its decadence has been caused directly by the rapacity of collec- 

 tors in the North Kent locality, is certain. I was once informed, on 

 good authority, that one of our collectors, had spent two days cutting 

 off all the rose-buds he could find in the locality, and taking them 

 home in sacks. When one considers the infinitely small proportion of 

 imagines one breeds from this method of collecting, and the damage 

 which can be done to a species whose life-history in all its stages, 

 is so well known, one wonders at the ignorance of the collectors, and 

 ceases to wonder how or why the species has been exterminated. As 

 far back as 1875, Mr Tugwell drew attention to the way in which the 

 species was being overworked. He writes : — " The beautiful P. rhodo- 

 dactylus was difficult to get in any number ; so many larvae have been 

 collected that the species is, and probably will be, year by year, a 

 more scarce insect. It is well to know the life-history of all species, 

 but at times it may not be an unmixed good, as it entails in many 

 instances, an almost entire destruction of a species, by too closely 

 working in it its larval state " (" Entomologist," Vol. VIII., p. 293.) 



Dr. Staudinger gives as localities, Central and Southern Europe, 

 Finland, Livonia, and Armenia, so that it has an extensive Continen- 

 tal range. 



(To be continued.) 



Some further remarks on D. Galii. 



By W. E. SHARP. 



I need hardly, I think, apologize to the readers of the Young 

 Naturalist for reverting once more to the case of this mysterious insect, 

 as the subject has proved its general interest by the discussion it has 

 evoked. The occasion, however, of these remarks is more especially 

 the paper of Mr. Tugwell, in the July number of this magazine. 

 Now, if I understand Mr. Tugwell aright, his theory is somewhat as 

 follows : — That while many species of our lepidoptera, among which 

 I understand him to place C. Edusa, although extremely erratic in 



