CHRYSOMELID^E. 213 



(284) 5. * Chrysomela clivicollis. Hill-necked Chrysomela. 



C. (clivicollis) violacea ,• elytris rvfis maculis tribus difformibus suturaque violaceis ; femoribus anticis bidentatis ; prothoracis 



disco valde elevato. 

 Hill-necked Chrysomela, violaceous ; elytra red with three differently shaped spots, and the suture violaceous ; anterior 



thighs bidentate ; disk of the prothorax very much elevated. 



Length of the body 4j lines. 



A single specimen taken in Canada by Dr. Bigsby. 



DESCRIPTION. 



Body between oblong and hemispherical, violet. Head punctured ; labrum without punctures : 

 prothorax elevated in the centre to an obtuse peak, from the summit of which descend several con- 

 centric channels which run nearly to the margin, the interstices of which are punctured : scutellum 

 violet with a green tint : elytra reddish, punctured, punctures scattered with some tendency to arrange 

 into rows ; three large dark violet spots distinguish the elytra, the first upon the shoulders subtri- 

 angular with the vertex truncated, the second near the apex bilobed, the third at the base forming 

 with that on the other elytrum a large cruciform spot ; suture violet : anterior thighs armed with 

 two stout teeth. 



This singular species in its form and the markings of its elytra seems to make some approach to 

 the CoccinellidfS, but it exhibits all the characters of a genuine Chrysomela ; should more species 

 be found agreeing with it in the remarkable peak of the prothorax and teeth of the fore thighs, it 

 might be regarded as forming a subgenus. 



xxiv. * Subgenus Phytodecta. Kirb. 



Tibiae armed near the apex with an external tooth. 

 Elytra punctured with the punctures arranged in rows. 



(285) 6. Chrysomela (Phytodecta) rufipes. Red-legged C. Phytodecta. 



Chrysomela rufipes. De Geer Ins. v, 295, 4, t. viii, / 25. Payk. Fn. Suec. ii, 69, 22. Gyll. Ins. Succ. iii, 486, 29. 



10-notata. Marsh. Ent. Brit, i, 175, 1.3. 



■ 10-punctata. Scrub. Journ. 289, 182. Mart. Col. t. xvi, /. 40. Steph. Cat. 222,. 2276, 17; Illustr. Mandib. 



iv, 338, 3. 

 La Chrysomele rouge a points noirs. Geoffr. Ins. i, 258. 



Length of the body 2| lines. 



A single specimen taken in the Expedition. 



