PLAGIODERA. — CHRYSOMELA. 



67 



43. Plagiodera transversa, Olivier. 



Chrysomela transversa, 01., Ent. v, 1807, p. 577, pi. 9, fig. 134. 

 The antennae are black with the base yellow-brown. The eyes 

 are black. The head is yellow-brown, marked on the vertex with 

 a strongly impressed transverse line. The pronotum is shining 

 yellow-brown, without any markings. The scutellum is yellow- 

 brown. The elytra are very finely punctate, shining dark blue. 

 The underside of the body is yellow-brown. It was obtained by 

 M. Eiche from " East India." The type is in M. Brongniart's 

 collection. 



The above is a translation of the original description in Latin 

 and French. I have not seen the insect. The figure in Olivier's 

 work, which is wrongly numbered, does not help in arriving at a 

 proper diagnosis. This insect is put doubtfully under the genus 

 Plagiodera in Weise's Catalogue (Col. Cat., part 68, 1916, p. 137), 

 and is not included in the key which I have given above (p. 61). 



Genus CHRYSOMELA, Linn. 



Chrysomela, L., Syst. Nat., ed. x, 1758, p. 368 ; Latreille, Consid. 



gen. 1810, p. 432* 

 Melasoma, Steph., 111. Brit. Eut. iv, 1831, pp. 349-350; id., Man. 



1839, pp. 303, 307; Redt., Gatt. deutsch. Kaferf. 1845, p. 116; 



Weise, Ins. Deutschl. vi, 3, 1884, p. 551 ; Fowler, Col. Brit. Isl. 



iv, 1890, p. 308 ; Everts, Col. Neerl. ii, 1903, p. 445 ; Reitter, 



Fauna Germ, iv, 1912, pp. 124, 126. 

 Lina, Redt., Fauna Austr. 1849, p. 551 ; Chapuis, Gen. Col. x, 1874, 



pp. 369, 375; Jacoby, Biol. Centr.-Amer. vi, 1882, p. 193. 

 Melosoma, Bedel, Faune Col. Bass. Seine, v, 1892, p. 141. 

 Bionomics: Kirby & Spence, Introd. Entomol. ii, 1817, p. 279; 



Westwood, Introd. Classif. Ins. i, 1838, p. 388, f. 48; Chapuis and 



Candeze, Mem. Soc. Liege, viii, 1853, p. 610. 



Genotype, Chrysomela populi, L. 



Body elongate. Head broad, with the upper surface marked 

 with a Y, depressed and punctate. Antennae hardly extending 

 beyond the base of the pronotum, with the six apical segments 

 thickened, forming an elongate club. Prothorax slightly narrower 

 than the base of the elytra, its front edge broadly emarginate, 

 posterior angles almost right angles, anterior angles rounded; an 

 obliquely longitudinal strip of surface on each side of the pronotum 

 is raised and convex. Scutellum, triangular with apex rounded. 

 Elytra confusedly punctate; along the lateral margin of each is 

 an im punctate narrow border which is slightly convex, distinctly 

 bounded from the confusedly punctate surface, and which some- 

 times bears an irregular row of punctures. Underside : in the 

 species which represents this genus in India, the chief character 

 .which normally differentiates a beetle of this subfamily, viz., that 

 the third (bilobed) segment of the tarsus is not split but entire 



* Relative to the name of this genus, see remarks above (p. 17) under 

 Clirysolina. 



