188 A MANUAL OF DANGEROUS INSECTS. n 



Psylllodes chrysocephala Linnagus; Psylllodes napi Fabricius. 

 (Rape Flea Beetles. Chrysomelidse; Coleoptera.) 



Hosts: Crucifers, rape, cabbage, etc. 



Injury: Adults feed on foliage, flowers, and fruit. 



Biology: Eggs are laid in the leaf axils. Larvx bore into stem and roots. Breed 

 continuously through season. 



Distribution: Europe. 

 SoRAUER, P. Handbuch der Pflanzenkrankheiten, 3d ed., 1913, vol. 3, p. 523. 



Evergestls extimalis Sc. 



(Rape Seed Worm. PyraLidse; Lepidoptera.) 



Hosts: Rape, radish, cabbage. 



Injury: Feeds on the seed, spinning a web among the 

 fruiting heads. 



Description and biology: Moth, wing expanse 26 mm., 

 forewings light yellow ochraceous, with two rusty-brown 

 transverse lines, violet-gray fringe. Larva yellowish 

 green, with lateral gray stripe and four dorsal rows of 

 dark- brown spots; head and thoracic shield black; 

 18 mm. 

 SoRAUER, P. Handbuch der Pflanzenkrankheiten, 3d 



ed., 1913, vol. 3, p. 308. 



B. OTHER IMPORTANT RAPE INSECTS. 



COLEOPTERA. 



Nitidulidse. 



Meligethes xneus Fabricius; Europe; larvae feed on young shoots. 



Curculionidae. 



Ceutorhynchus assimilin Paykull; Europe; breeds in fruit. 

 ^ Ceutorhynchus guadridens Panzer; Europe; Long Island, N. Y. 

 breeds in roots. 

 Ceutorhynchus sulcicollis; Europe; forms galls on roots. (See 

 text fig. 89.) 



LEPIDOPTERA. 



Hepialidse. 



Hepialus humuli Linnaeus; Europe. (See Hops.) 



DIPTERA. 

 Fig. 89.— Galls of Ceutorhynchus Itonididae. 

 sulcicollis on rape. (Ritzema Dasyneura brassicm Winner; Europe; attacks fruit. (See 



Bos.) Cabbage.) 



RASPBERRY. 



See Blackberry. _ . ^^ . ^^ 



RATTAN. 



( CaZamws spp. Family Pal niacese.) 

 Palms of tropical Asia, some of wliich are used to furnish rattan canes. They make 

 excellent conservatory plants. 



IMPORTANT RATTAN INSECTS. 



COLEOPTERA. 

 Lyctldae. 



Lyclus brunneus Stephens; Europe, Australia; bores in furniUue dud sapwood on unseasoned tnubcr. 



LITERATURE. 

 Froggatt, W. W. Australian Insects, 1907 



