WINK-MAKING IN CALIFORNIA. 5D 



considerable numbers upon the leaves, and some even came 

 from the galls, many of which they had cleared of their in- 

 habitants. A few specimens of the tyrog/yphus, or phylloxera 

 mite, appeared among the winged insects that were taken 

 from the "trap;" they were also found upon the roots of 

 adjoining vines. It is, therefore, probable that its usual ene- 

 mies have accompanied the phylloxera to California. 



There have been other specimens of the same seen at 

 different places, especially on roots taken for experimental 

 purposes. Some were found on the fourteenth of April, the 

 root specimen having been taken nearly a month before. 



VARIETIES OF VINES BEARING THE SEVERAL FORMS. In 

 speaking of the forms found during the investigations, it 

 must not be understood that all of the vines are productive of 

 the same forms; nor must it be understood that when we 

 speak of the rapid production of any particular form that this 

 applies to all the vines infested. We are specially favored in 

 this direction by having in our vineyard plot a few vines rep- 

 resenting those varieties which are more or less resistant to 

 either type of the phylloxera. Only one vine has developed 

 the gall type, only one has produced the winged form in 

 appreciable numbers, others only when transiently assuming 

 the necessaiy conditions have produced them at all. If a 

 slight growth of soft "tuberous" rootlets be formed we may 

 find pupae upon them; but upon the rootlets of the same vine 

 having a firmer texture none will be found. Upon the 

 "Cornucopia," however, this adaptability of rootlets to the 

 production of the winged form extends to roots of a larger 

 and firmer growth. The hybrid of the West's St. Peters and 

 Clinton has produced all the forms we have thus far observed, 

 except the gall type, thereby showing a special fitness for the 

 production of the root-inhabiting types. 



Here, too, we should note the peculiarity of these two 

 vines, adjoining each other, hybrids of the same original 



