THE GE&PE CUECULIO. 



the width, at the widest point, 2 mm. The body is sparsely covered 

 with short, fine hairs. 



THE PUPA. 



The pupa (PL I, I) is short, stout, and yellowish white, with the 

 eyes and tip of rostrum reddish and with other dark markings 

 developing as the adult stage is approached. The length is 3 mm. 

 and the width 2 mm. The head and body are sparsely covered 

 with long, stiff hairs. The pupa occupies a small, spherical cocoon 

 formed of grains of earth, the cell having a delicate membranous 

 lining. 



THE ADULT. 



The beetle (PL I, A-D) is short, robust, 3 mm. in length by 2.5 mm. 

 in width, the snout being half as long as the body. The color, when 

 fresh from the cocoon, is almost black, fading with age to chocolate 

 brown. The surface is coarsely sculptured with prominent, acute 

 tubercles on the thorax and elytra and the entire body is clothed 

 with minute, whitish, scale-like hairs. 



HABITS AND ACTIVITIES OF THE BEETLES. 



At about the time Concord grapevines are blooming the grape 

 curculio beetles emerge from hibernation and appear upon the grape 

 leaves. Within the geographical range of the species the date of 

 the first appearance of the beetles on the vines will vary considerably, 

 according to season and locality. In, West Virginia the dates of 

 their first observed appearance on the vines are as follows: 



Year. Date. 



1904 June 1 



1905 May 25 



1916 June 14 



1917 June 2 



Blatchley and Leng (33) record the beetles from central Florida 

 from February 11 to April 13. At first the beetles are somewhat in- 

 active and an individual may remain on a single leaf for a week or 

 more at a time, feeding at intervals on the upper surface and shelter- 

 ing during unfavorable weather on the underside. Feeding on the 

 exposed part of the foliage is engaged in rather freely from the first 

 appearance of the beetles in the spring until the fruit is ripe, thus 

 rendering the beetles susceptible to arsenical sprays at any time 

 while the fruit is on the vines. Food is also taken in a limited way 

 from the bark of the fruit stems and the females devour the tissues 

 removed in making their egg punctures (PL I, 67) in the fruit. The 

 immature grapes probably never are attacked by the beetles primarily 

 for food, but the ripe fruit is sometimes punctured for this purpose. 



The beetles frequently rest on the leaves for long intervals without 

 motion and, even when eating or crawling about, their movements 

 are so slight or so slow as not to attract attention. In appearance 



