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



equal distances, but arranged in a more regular line on 

 each stria; and, lastly, the shape of the telum is entirely 

 different. 



Chrysomela Jlavomarginata, Say. 



Journ. Acad. Philad. iii. p. 452 ; Suffr. Stet. Ent. Zeit. 

 1858, p. 387. 



Mas. — Telum oblongum, curvatum, apice recurvato, in 

 mucronem breviorem antrorsum producto. 

 Hab.^ — Louisiana, Colorado. 



Closely allied to Ch. marginata. The elytra have the 

 punctures more irregularly placed on the stri^, the latter 

 on the outer disk and at the apex being sometimes entirely 

 lost. The telum, although formed on the same general 

 plan, is shorter, its sides are more parallel, its apex more 

 distinctly recurved, more obtusely angled, and the apical 

 process is broader and shorter ; the duct is stouter, more 

 rigid, and is not produced beyond the apex of the tehim. 

 In all other respects this species agrees closely with 

 Ch. marginata, of which species in all probability it Avas 

 originally an offshoot. 



Chrysomela Adamsi. 



Oblongo - ovata, convexa, nigro-aut viridi-cyanea, 

 nitida ; tliorace evidenter punctato, lateribus incrassatis, 

 sulco longitudinali lato, for titer, irregulariter punctato, 

 intus marginatis ; elytris rufis, sat fortiter subseriatim 

 punctatis. 



Long. 3 1 — 4 lin. 



Hub. — Oo Bay, Chinese Tartary (Adams); Eastern 

 Siberia (Schrenck.) 



Head remotely punctured, the puncturing rather closer 

 on the clypeus ; apical joint of paljuis rather broader 

 than the penultimate, its apex truncate. Thorax rather 

 more than twice as broad as long ; sides straight and 

 parallel behind the middle, rounded and converging in 

 front ; disk moderately convex, distinctly punctured ; 

 lateral margin broad, thickened, bounded within by a 

 broad (sometimes interrnpted) longitudinal depression, the 

 surface of which is coarsely and irregularly piuictured. 

 Elytra rather broader than the thorax, subparallel, their 

 apices (conjointly) regularly rounded ; above convex. 



