27 



Mr. William Saunders, in an excellent article on the Mildew of 

 the Grape, has asserted that the Delaware is a hybrid between the 

 NortJiern Fox Grape and the Suminei- Grape {Vitis ccstivalis.)* If 

 a bug-man may yenture to dispute the opinion of a plant-man, \ 

 should infer that as neither of the above two wild grapes are subject 

 to these leaf-galls, so far as I know and as the Frost Grape notoriously 

 is, the Delaware, which I haye found to bear these leaf-galls only to 

 a limited extent, is a hybrid between the Northern Fox Grape and the 

 Frost Grape. Certainly its botanical characters seem to me to be 

 intermediate between these two species. 



The practical lesson to be drawn from the above theory is, that 

 where two varieties of cultivated grape are in other respects equally 

 desirable, and equally suited to the soil and climate of the vineyard- 

 ist — say, for instance, the Clinton and the Concord — the Concord 

 should be preferred, because, being a variety of the Northern Fox 



scribed twice over many years before he wrote — namely, once in 1851 by 

 Fitch, and once in 1861 by Osten-Sacken — and to receive which. Osten-Sacken 

 had very proiierly founded the gemi? Horniaphis, of which Dr. Shimer's so- 

 called new genus Hamamclistes is a mere synonym. It is very true that we 

 are all of us liable to such oversights, when the book in which a supposed 

 new species has been already described is out of print, or very rare, or only 

 to be met with in foreign countries. But, in this particular case, all the de- 

 tails, which prove the above facts, were collected together and published by 

 myself eleven months before Dr. Shimer himself published^ and in the very 

 tvork in which he himself published, which can be procured, by any one, with 

 the greatest ease, by paying the very moderate jirice demanded for it. (Com- 

 pare my Paper, Froc. Ent. Boc., Phil., VI., p. 281 and Dr. Shimer's Paper, 

 Trans. Am. Ent. Boc., I., pp. 283—4.) 



In order to clear away as much as possible the mystery in which Dr. 

 Shimer has enveloped this very interesting subject, I annex, from my Jour- 

 nal, a full account of the Bark-louse Hickory-gall, which I had referred to, 

 as quoted above, under the MS. name of Cari/ie semen. I am now acquainted 

 in all, besides the Grape-leaf gall Vitifolia', Fitch, with three very distinct 

 galls on the Hickory, all apparently formed by this same genus of Bark-lice 

 [Dactylosphcera) ; namely, Caryce semen, new si^ecies on the Pignut Hickory, 

 (Carya glabra;) Carycevenw, Fitch, on the Shellbark Hickory, (Carya alba;) 

 and an undescribed species, CaryfP fallax, Walsh MS., with a strong external 

 resemblance to the Plant-louse Hickory-gall, Carya^foH(e, Fitch, but open- 

 ing, not above, as is always the case with that gall, but invariably below. 

 This last gall I found* June 17th — 29th, 1867, absolutely swarming on the 

 leaves of a bush of the Shellbark Hickory. In none of these three Hickory- 

 galls, though I have opened hundreds of each of them, have I ever yet met 

 with the winged males; and in the Grape-leaf gall the males are equally 

 scarce. 



*Mr. Saunders' article may be found in the Monthly Report of the Agri- 

 cultural Department, 1867, p. 333. 



