350 MANDIBULATA. — COLEOPTERA. 



Chrysomelse by having the palpi slender, with the terminal joint 

 small, obtuse; the antennae short, subclavate, compressed ; the thorax 

 narrowed, with the lateral margins somewhat thickened; elytra 

 broad, ample; wings long; body elongate, convex; legs short, &c. 



A. "With the elytra punctate: thorax with its lateral margins distinctly incrassate. 



Sp. 1 . Populi. Nigro-ccerulea, nitida, elytris rvjis, confertissime punctulatis ipso 



apice nigris. (Long. corp. 5 — 6 lin.) 

 Ch. Populi. Linne.—Martyn, Col. pi 15, /. 18, 19.— G. N. Populi. Steph. 



Catal. 225. No. 2302. 



Blue-black, shining : head finely punctured, with an angulated and a longitu- 

 dinal impression in front : thorax with the disc very glossy and impunctate, 

 the sides thickly punctate, with a deep impressed line considerably within 

 the margin of each side : elytra rufous, very finely punctulate, with the apex 

 of the suture black : legs and base of the antennae blue-black, apex of the 

 latter and the tarsi black. 



Not very abundant near London, found, however, occasionally in 

 Battersea-fields on poplars, in plenty. " Hornsey-wood." — Mr. 

 Ingpen. "• Whim, Peebles-shire.'" — B.ev. W. Little. " York." — 

 W. C. Hewitson, Esq. " Baron-wood." — T. C. Hey sham, Esq. 

 " Whittlesea." — Rev. A. H. Matthews. " Ely, Cambridge, &c."" 

 — Rev. L. Jenyns. " Very common in Crwmlyn-burrows." — L. W. 

 Dillzvyn, Esq. " Epping." — Mr. Doubleday. 



Sp. 2. Tremulse. Cceruleo-virescens, nitida, elytris rufo-testaceis immaculatis, 



subriigosis. (Long. corp. 4—5 lin.) 

 Ch. Tremulae. Fabricius.—G. N. Tremulaj. Steph. Catal. 225. No. 2303. 



Greenish-blue, shining ; head with an irregular impression in front : thorax 

 very glossy, obsoletely punctured, the punctures most distinct on the lateral 

 margins, each of which has a deep impressed curved fovea considerably within 

 the margin : elytra rufo-testaceous, immaculate, the surface thickly and coarsely 

 punctured, giving a somewhat rugose appearance : legs and base of the an- 

 tennae blue-black, apex of the latter fuscous. 



Extremely abundant in some of the woods in the vicinity of the 

 metropolis, especially about Highgate, Muswell-hill, Colney-hatch, 

 &c. in June, destroying the young aspens and willows. " Monk's- 

 wood, in plenty." — C. C. Babington, Esq. " Cambridge, less 

 abundant than M. Populi." — Rev. L. Jenyns. " Near Swansea." 

 — L. W. Dillwyn, Esq. 



