148 



fifth of an inch long, is whitish while the grape is green but usually 

 partakes of the*,olor of the berry as it matures. 



This species has been found quite injurious to grapes in various 

 sections of Illinois, but especially in the southern part. Its opera- 

 tions may be distinguished from the "rot" by the fact that the in- 

 fested berries do not rot or decay, but with the exception of the punc- 

 ture and slight discoloration remain to the last plump and sound as 

 far as external appearances indicate. 



Remedy. — As it falls at the least disturbance of the vines, it should 

 be carefully watched for in June, and as soon as found should be 

 shaken off the vines on a white sheet. 



As Mr. Walsh has given a full history of this species in his first 

 report, I close this account with a copy of his full description of the 

 beetle and larva. 



Spec. char. Imago — Black, with minute, short, scale-like appendages, 

 white hairs, so as to give the black a grayish tint. Head punctured 

 almost as closely as the thorax; beak reaching a little beyond the base 

 of the middle pair of legs, nearly cylindrical, curved inwards in a cir- 

 cular arc, and sometimes tinged with a brick red. Thorax with 

 rather large confluent punctures, its sides converging in a convex 

 quadrant for two-thirds of the way from base to tip, thence to the tip 

 converging very gradually in a straight line. Tip of thorax about 

 one-half as wide as its base, and squarely docked with a slight cen- 

 tral excavation; its anterior edge more or less tinged with brick red. 

 A transverse impressed line three-fourths of the way from the scutel 

 to the tip of the thorax, and a deeply impressed dorsal longitudinal 

 line. On each side of the dorsal line is a very large, rounded tubercle, 

 and outside this, but rather nearer the base, and almost on the lateral 

 edge of the thorax, is a smaller, sub-acute tubercle. The wing cases 

 are slightly freckled with small gray spots; their grooves are punctate, 

 with large, widely-separated punctures, and the respective interstices 

 between the second and third, fourth and fifth, the sixth and seventh, 

 and the eighth and ninth grooves are wider and, especially the first 

 two, more highly elevated and rounded in front than the others. The 

 lower surface of the body is punctured like the thorax, but much 

 more sparsely. The legs are of a more or less dull brick red, the 

 thighs unarmed, the four front shanks, with a large rectangular tooth 

 near their outer base, the hind shanks unarmed. 



Length of the body .09 to .11 of an inch. 



Larva. — An elongate, legless grub, four or five times as long as 

 wide, nearly cylindrical behind, but tapered in front toward the head. 

 When fully extended, its length is about two-tenths of an inch. The 

 head is large, horny, and of a pale brownish-yellow ; the jaws (man- 

 dibles) are chestnut-brown, robust, acutely pointed, and gradually 

 curved inwards, and their general direction in repose is parallel with 

 the axis of the body. Along the upper surface of- the skull is a very 

 distinct longitudinal groove or suture. The color of the body is semi- 

 transparent, yellowish-white, with a darker stomach. Each segment 

 of the body bears upon each side a large, fleshy, acutely pointed tuber- 

 cle, directed sidewise, by which character this larva may be distin- 

 guished at once from those either of the plum curculio (Conotmchelus 

 nenuphar, Herbst),or of the pl'um-gouger (Anthonomusprunicida, Walsh); 

 and, in addition, the last or anal segment bears on each of its hind 

 angles a similar tubercle, directed backwards. 



