NORTHUMBERLAND AND DURHAM. 233 



Larva. Trans. Linn. Soc. vt supra,/. 3. 



Once near High Force, Teesdale. — Wni. Backhouse, Esq. 



The larva, according to Dr. Staudinger, who has studied the 

 insects of this family most carefully, passes at least two winters 

 in that state in the interior of Populus nigra and P. tremula, 

 chiefly in the underground portion of the trunks, and in the roots 

 of those trees, feeding on the wood. It forms its coccoon either 

 within the bark, or in the ground adjoining. 



2. S. Bembeciformls, Hilh. 



Sphinx Bembeciformis, Huh. Sphin. 98. Sphinx Crabro- 



niformis, Lewin, Trans. Linn. Soc. iii. 1, pi. 1,/ G, 7. — 



Don. Brit. Lis. xiii. 7, jyl. 436. — Wood Ind. Ent. t. 4, 



/. 24. Trochilium Crabroniformis, Steph. Illust. Haust. 



i. 138. Trochilium Bembeciformis, Curt. B. E. viii. 



t. ^l'2,f. * Sphecia Bembeciformis, Staint. Man. i. 102. 



Larva. Trans. Linn. Soc. ut supra, f. 8. 



Common throughout the district, and especially so around 



Newcastle. There is scarcely a willow (Salix caprcea) of ten 



years growth in the fences of our suburban gardens, that is not 



perforated by the larvae, and ultimately so weakened that the 



first gale of wind blows it down. In July, the remains of the 



pupa cases may be observed protruded through the bark in great 



numbers, though the insects are seldom seen. This species 



abounded in some willows in a garden at the Westgate some 



twenty-five years ago, and I was accustomed to surround their 



trunks with gauze, at the proper season, and so secured the 



Moths. Twizell.— P. J. Selhy, Esq. " In Rennie's Lane."— 



Ornshifs Durham. 



32. Trochilium, Scop. 



1. T. TiFULIFORME, TJlrn. 



Sphinx Tipuliforme, LJnn. S. Nat. ii. 804. — Hah. Sphin. 

 A^.—Don. Brit. Ins. ii. 41, jil. 52, 53. — Wood Ind. Ent. 

 t. 4, /. 32. iEgeria Tipuliformis, Steph. Illust. Haust. 

 i. 142. Sesia Tipuliformis, Stand. Ses. Berol. 53. Tro- 

 chilium Tipuliforme, Staint. 3 fan. i. 105. 



