INSECTS OP QUINCE, KADISH, AND RAPE. 187 



COLEOPTERA. 

 Curcixlionidse. 



Magdalis barbicornis Latreille; Europe. (See Apple.) 

 MagdalispruniUrmieus; Europe; bores under bark. 



LEPIDOPTERA. 

 Cossidse. 



Cossus tristis Dru.; Africa. (See Apple.) 



DIPTERA. 

 TrjiJCtidae. 



Ceratilis capitata Wiedemann. (See Fruit.) 

 BactTocera tryoni Froggatt; Orient. (See Fruit.) 



RADISH. 



(Raphanus spp. Family Cruciferae.) 



Cultivated root crops native of Europe and Asia. Grown from seed. (See Cru- 

 cifers.) 



A. A RADISH INSECT LIKELY TO BE IMPORTED. 



* Anthomyia radicum Meigen. 

 (Radish. Fly. Anthomyidse; Diptera.) 



Hosts: Raphanus spp. (including radish), Brassica spp. (cabbage, etc.). 



Injury: Breeds in the roots. 



Description and biology: Male fly blackish, female ash gray; scutellum blackish 

 with three black streaks; abdomen light gray, with black medium streak; undersides 

 and face white in male, front triangle and all appendages black; wings clear; length 

 4.5-5.5 mm. Maggot whitish, 6 mm. long. Pupates in soil. 



Distribution: Exirope, and has been introduced into North America. 

 SoRAUER, P. Handbuch der Pflanzenkrankheiten, 3d ed., 1913, vol. 3, p. 425. 



B. OTHER IMPORTANT RADISH INSECTS. 



COLEOPTERA. 

 Curculionidse. 



Ceutorhynchus assimilis Paykull, Europe; breeds in seed pod. 



Ceutorhynchus raphini Fabricius; Em-ope; breeds in stem. 



Ceutorhynchus robertii Gyllenlial; Europe; breeds in crown gall on Raphanus raphanistrum. 



LEPIDOPTERA. 

 Pyralidse. 



Evergestis extimalis Sc. (See Rape.) 



EAPE. 



(Brassica napus Linnseu.'s. Family Cruciferse.) 



An important forage and cover crop; also valuable for the oil compressed from 

 the seed. 



A. BETTER KNOWN RAPE INSECTS LIKELY TO BE IMPORTED. 



Phyllotreta vittula Redtenbacher. 

 (Rape and Grain Beetle. Chrysomelidse; Coleoptera.) 



Hosts and injury: Mines leaves of Setaria; adults feed on beets and rape (Hungary); 

 larva in base of stems of barley, rye, and wheat, causing much damage (Scandinavia; 

 Russia). 



Description: Beetle striped with yellow. 

 SoRAUER, p. Handbuch der Pflanzenkrankheiten, 3d ed., 1913, vol. 3, p. 525. 



