172 A MANUAL OF DANGEEOUS INSECTS. 



PLANTAIN. 



(See Banana.) 



PLUM; CHERRY; PRUNE. 



{Prunus spp. Family Rosacese.) 



Deciduous trees of the northern hemisphere, with showy flowers and delicious 

 fruits, of which many horticultural varieties are cultivated in this country. 



A. BETTER KXOWN PLUM INSECTS LIKELY TO BE IMPORTED. 



* Enophyes spp. 

 (Plum Blister Mites. Eriophyidse; Acarina.) 



Species: '^E. phloeocoptes Nalepa; Europe, North America; Prunus domestica, P. 

 insititia, P. spinosa. E. similis Nalepa; Europe; Prunus armeniaca, P. chamsecerasus, P. 

 domestica, P. insititia, P. spinosa. :^E. padi Nalepa; Europe, North America; Prunus 

 padus. P. domestica, P. spinosa. 



Injury: Form different kinds of blister galls on plum trees and are quite injurious. 

 These four-legged blister mites are so small that they are easily transported on nursery 

 stock, hence the wide distribution. 

 SoRAUER, P. Handbuch der Pflanzenkrankheiten, 3d ed., 1913, vol. 3, pp. 125-127. 



Psylla pruni Scopoli. 



(The Plum Psylla. Psyllidse; Hemiptera.) 



Hosts: Plum, Prunus spinosa; P. insititia. 



Injury: Not at present an important pest. 



Description and biology: Adult, thorax marked with red and brown; abdomen with 

 broad brown bands on sides and back; wings dark brown. Development and gen- 

 erations similar to P. pyrisuga. (See Pear.) 



Distribution: Europe, Siberia. 

 Henchel, G. a. 0. Die Schadlichen Forst- und Obstbaum-Insekten, 1895, p. 490. 



Peltophora pediclllata Kirby. 



(The Cherry Bug. Pentatomidse ; Hemiptera.) 



Hosts: Cherry; strong-scented flowering shrubs; wild fig. 



Injury: Probably not at present important. 



Description and biology: Adult, about 12 mm. long; bright metallic green in color 

 with black spots on dorsum. The greater part of ventral surface, edges of thorax, 

 and two blotches at base of scutellum bright coral red. 



Distribution: Australia (New South Wales to North Queensland). 

 Froggatt, W. AV. Australian Insects, 1907, p. 327. 



Diphucepliala colaspidoides Gyllenhal. 

 (The Cherry Green Beetle. Scarabaeidae; Coleoptera.) 



Hosts: Cherry and other fruit trees; shrubs. 



Injury: Very serious at times. Defoliation by adults. 



Description and biology: Adult, length 8 mm.; metallic green; smooth; elytra 

 deeply marked with punctured striae. Damage done in this stage. Larva feeds on 

 roots of various plants. Not of economic importance. (See plate xxxiii.) 



Distribution: Southern Australia. 

 French, C. Handbook of Destructive Insects of Victoria, 1893, pt. 2, p. 27. 



