184 Mr. J. S. Baly on the differential characters 



D. Cyanea ant metallico-CiKrulea. 



E. Casruleo-nigra aut nigra. 



Ch. luctuosa, Duft. (sec SnfFrian). 

 Long. 4^ — 5 lin. 

 Hab. — Swiss Alps, Dieppe, Turkey (Jelski). 



Thorax nearly twice as broad as long ; sides moderately 

 rounded in the 2, parallel behind the middle in the $ , 

 thickened, bounded within by a deep entire longitudinal 

 groove, the surface of which is coarsely foveolate-punctate ; 

 disk finely but distinctly punctured. Elytra narrowly 

 oblong in the $ , broader and dilated posteriorly in the 

 other sex ; convex, rather closely impressed with aciculate 

 punctures ; interspaces rugulose. 



All the specimens I have seen of this species — twenty- 

 six in number — agree in having the coloration of the 

 elytra of a uniform tint, all markings being obsolete. 

 I have, therefore, excluded Suffrian's varieties a, b, c ; 

 a bluish-black specimen sent to me by Dr. Suffrian as 

 Ch. luctuosa, Duft., belongs to the present species; another, 

 metallic blue, from Maerkel's collection, bearing the same 

 name, is a variety of Ch. bifrons. 



In addition to the structural characters, the larger more 

 robust form in both sexes, together with the more oval 

 shape of the elytra in the $ sex, will separate this insect 

 from its allies in the same subsection. 



Clirysomela cacalice, Schrank. 



Suffr. Mon. p. 150. 



Ch. tussilaginis, Suffr. ? 



Anguste elongata, thorace disco sat remote, irregulariter 

 punctato, ad latera rude rugoso; lateribus incrassatis, intus 

 longitudinaliter excavatis ; ely tris parellelis, minus nitidis, 

 sat crebre punctatis, interspatiis aciculato-rugulosis ; pal- 

 porum maxillarium articulo ultimo quam penultimo an- 

 gustiori, ovali. 



Mas. — Tarsorum articulo basali modice dilatato, semi- 

 ovato ; duobus anticis fere a?quilongis ; tertio paullo 

 longiori ; abdominis segmento anali concavo-emarginato, 

 bisinuato, lobo intermedio obtuse angulato ; telo modice 

 elongate, curvato, lateribus parallelis, apice oblique- 

 convergcntibus, apicc ipso vix incurvato, sat valdc pro- 

 ducto, sublinguifbrmi. 



