INSECTS OF PLUM AND CHEEEY. 



173 



Khynchites coeruleus De Geer. 



(Twig Cutter. Rhynchitidae ; Coleoptera.) 



Host: Apple. 



Injury: Cuts off apple shoots. Only nursery stock and bush trees attacked. 



Description and biology: Adult, length 3-4 mm.; deep blue, shiny, clothed with 

 long, upright fuscous pubescence; antennae, legs, and rostrum black; elytra, with 

 deep punctured striae. Appear in spring and feed on leaves. Pupate in soil. Larvae 

 white, feed about a month, then enter 

 soil. Eggs placed singly in soft shoots 

 2 to 4 inches from tips. Shoots cut off 

 below place of oviposition. (See text 

 fig. 80.) 



Distribution: Europe. 



Theobald, F. V. Insect Pests of Fruit, 

 1909, p. 117. 



Rhynchites cupreus Linnaeus. 



(Plum Borer. Rhynchitidae; 

 Coleoptera.) 



Hosts: Plum, prune, cherry. 



Injury: Attacks young fruit. 



Description and biology: Adult, length 

 3^ mm., color bronze-copper. Occurs 

 in autumn, hibernates in this stage and 

 reappears in early spring. Pupates in 

 ground. Larva develops in fruit, causing 

 it to fall. Eggs are placed singly in 

 young fruit at base of peduncle. (See 

 text fig. 81.) 



Distribution: Europe. 

 Henschel, G. A. 0. Die Schadlichen 



Forst- und Obstbaum-Insekten, 1895, 



p. 81. 



Fig. so. — Plum twig-cutt(T {Rhynchites cosruleus): 

 Adult and injury. (Theobald.) 



Brachyrhinus laevigatus Fabricius (Otiorhynchus). 



(Brachyrhinidae; Coleoptera.) 

 Host: Plum. 



Injury: To buds and young twigs. 



Description and biology: Adult, length 6-6.5 mm.; black, shining, without hairs; 

 neck-shield rather flat, disk punctured; wing covers finely furrowed. 



Distribution: Middle Europe. 

 Henschel, G. A. 0. Die Schadlichen Forst- und Obstbaum-Insekten, 1895, p. 109. 



Magdalis armigera Geoffroy. 



(Plum Stem Piercer. CurcuUonidae; Coleoptera.) 

 Host: Plum. 



Injury: To twigs and foUage. 



Description and biology: Adult, length 3.5-4.5 mm.; color, dull black; neck shield 

 with thorn-like projections near fore margin, 4-cornered, hardly as wide as long, 

 finely punctate; elytra strigose punctate, space between punctations flat; beak shorter 

 than neck shield. Adult attacks leaves. Larva develops in twig. Pupates in 

 burrow. 



Distribution: Europe. 

 Henschel, G. A. O. Die Schadlichen Forst- und Obstbaum-Insekten, 1895, p. 94. 



