NORTHUMBERLAND AND DURHAM. 223 



297. Ceuthorhynchus, Schcnh. 



1. C. suBCicoLLis, Faylz. 



Stei^h. Illust.j Mand,, iv., 26. 

 Common, on the flowers and leaves of Cruciferous plants. 

 The larva inhabits a tubercular gall, on the roots of turnips, 

 cabbages, &c. 



2. C. AssiMiLis, Payh. 



Nedyus assimilis, Steph. Illust, Mand., iv., 28. 



Common, on the flowers of turnips and other Crucifera3. 



Both larva and perfect insect are very hurtful to the growth 

 of turnip seed; the former pierces the pod with its snout, and 

 extracts the substance from the seeds — the latter dwells in its 

 interior and devours them. 



3. C. Ertsimi, Payh. 



Nedyus Erysimi, Steph. Illust, Mand., iv., 28. — X. chlor- 



opterus, lb. I.e., 29. 



"Twizell." — P. J. Selhy, Esq. Long Benton and Washington. — 



T. J. B. On Cardamine amara, in Eavensworth woods ; and on 



the banks of the Derwent, above Winlaton Mill. — J. H. Feb. — 



May. 



4. C. CONTRACTUS, Mavsli. 



Nedyus contractus, Steph. Illust., Hand., iv., 29. 



On the flowers and young leaves of the Cruciferte ; frequent. 



The larva, in its earliest state, is probably a miner in the leaves 

 and stalks of turnips, cabbages, &c., (See my Essay on the Insects 

 Injurious to the Turnip) Crop, 20. Edin. 1849.) The perfect 

 insect is often very obnoxious to the cultivator, by nibbling and 

 perforating the cotyledons of turnips, cabbages, radishes, &c. In 

 some seasons, after the March winds, it occurs in vast profusion 

 on the sandy coast at South Shields. — J. H, 



5. C. NiGRiNUS, Harsh. 



Nedyus nigrinus, Steph. Illust, Mand., iv., 29. — Rhynchsenus 

 depressicollis, GyU. Ins. Suec, iii., 147. 

 On the water-cress (Nasturtiumoficinale), inWoolerHaugh. — 

 J. H. July. 



