60 



CHRYSOMELINjE. 



second, fourth shorter than third, fifth and sixth each almost 

 equal in length to fourth, the last five segments forming a 

 dilated club, opaque and covered with hair. Prothorax almost 

 twice as broad as long, narrowed anteriorly, sides straight, 

 anterior angles rounded, posterior almost right angles ; upper 

 surface rather closely covered with punctures, lateral margins 

 abruptly bent down, more finely punctate ; there is no ridge 

 which, as Jacoby states, can be " seen in a certain light " ; that is 

 only an optical illusion. Scutellum ovate, smooth, impunctate. 

 Elytra without distinct shoulders, almost as broad as the thorax 

 at the base ; on each elytron there are eleven rows of punctures, 

 including a long scutellar row which terminates at about the 

 middle of the elytron, and one along the extreme margin lying in 

 an impressed line ; it is difficult to see this last row unless it is 

 looked at when the insect lies on its back ; all the rows converge 

 on the apical surface ; interspaces between the rows smooth and 

 flat. Underside : epipleuron closely punctate, continuing to the 

 apex though narrowing ; the whole surface is closely punctate. 

 Length, 4 mm. 



Assam (Brit. Mus.). Uniteb Provinces: W. Almora, Kumaon, 

 one specimen (H. G. Champion). 



Type in the British Museum. The Kumaon example is slightly 

 smaller than the Assam specimens. 



Genus PLAGIODERA, BedtenbacJier. 



Plaqiodera, Reclt., Gatt. deutsch. Kaferf. 1845, p. 116; Chevr., Diet. 

 Univ. x, 1847, p. 233; Chapuis, Gen. Col. x, 1874, pp. 369,374; 

 Weise, Arch. Naturg. lxiv, 1898, p. 211. 



Genotype, Chrysomela versicolor a, Laicharting [armor 'acice, Redt. 

 nec L.]. 



Convex beetles ; colour brown, blue or green, always with a 

 metallic shimmer. Head generally broad, its width being 

 sufficient to allow it to fit into the emargination of the front edge 

 of the pronotum ; the upper surface is more or less punctate and 

 with a A-shaped impression which varies in different species. The 

 antennae are generally short, and there is always a difference in 

 structure and colour between the five or six basal segments and 

 the rest ; the relative lengths of the basal segments vary. Pro- 

 thorax always much broader than long, the sides slightly oblique, 

 the front margin widely emarginate, the basal margin varying in 

 its curvature ; anterior and posterior corners either rounded or 

 angulate ; upper surface always gently convex from side to side and 

 punctate. Scutellum always triangular in varying degree. Elytra 

 at base almost as broad as, or slightly broader than, prothorax; 

 upper surface couvex (at the humerus there is always a convex 

 elevation of varying degree of prominence) and punctate through- 

 out ; the punctures, although lacking in any definite arrangement, 

 may in some cases show a linear disposition along the suture and 

 on the lateral margin. The colour is generally uniform, in some 

 cases there is a border of light colour along the margins and the 



