366 PHYTOPHAGA. [Phyllotreta. 



vertex strongly punctured, antennae black with the base testaceous ; 

 thorax rather strongly punctured ; elytra subparallel until a little before 

 apex, strongly punctured, the punctures being arranged in rows at base, 

 and being finer and confused behind middle ; legs black, with the apex 

 of anterior femora, the knees of the intermediate and posterior pairs, the 

 under-side of the tibiae and the tarsi reddish. L. 1-1 f mm. 



On Nasturtium amphibium and other Cruciferae ; local, but not uncommon in 

 several districts ; London district, generally distributed and common ; Norfolk ; Cain- 

 bridge ; Hastings; Pulborough, Sussex; Portsmouth district; Olanvilles Wootton ; 

 Repton ; Manchester district, general ; Scotland, very rare, Solway district. 



P. undulata, Kuts. (flexuosa, Redt., nee 111.). Oblong oval, depressed, 

 black, shining, thorax with a slight aeneous reflection, elytra with a 

 longitudinal yellow band on each, which is broadly and shallowly 

 emarginate on its outer side, and has the inner side almost straight until 

 near apex, where it is abruptly curved inwards and narrowed ; antennae 

 black, with base pitchy or ferruginous, first joint dark, except at apex ; 

 thorax rather thickly and strongly punctured; elytra distinctly punctured 

 in rows, the punctuation becoming finer and more confused towards 

 apex ; legs black, tibiae reddish at base. L. 2-2f mm. 



Male with the fourth and fifth joints of the antennae slightly thickened. 



On Cruciferse, especially turnips ; generally distributed and common in England, 

 and probably Ireland ; Mr. Bold has the following remark in his catalogue of the 

 Insects of Northumberland and Durham (p. 104): " This species, and not P. nemorum, 

 is the ' turnip-fly ' of our district. Its smaller size, and nearly black legs, readily 

 separate it from the latter." Dr. Sharp's Scotch record, "rare, Solway and Tay 

 districts," seems, therefore, rather strange. 



P. nemorum, L. Larger on the average than the preceding, and 

 less depressed ; it may readily be known by having the tibiae entirely 

 reddish-yellow, or only slightly infuscate, and by the lighter base of the 

 antennae ; the yellow band on the elytra is slightly waved and not so 

 straight on its inner side, and the male has the fourth joint of the 

 antennae somewhat strongly, and the fifth moderately, incrassate, and 

 the sixth joint short. L. 2-3 mm. 



On Cruciferse, especially turnips ; generally distributed and far too common 

 throughout the greater part of the kingdom ; Mr. Bold, however, says that it is rare, 

 according to his experience, in the Northumberland and Durham district. Dr. Sharp 

 records it as very common in the south of Scotland. 



P. flexuosa, 111., Kuts., nee Redt. (fallax, All.). Subovate, rather 

 convex, black, shining, with the base of the antennae and tibiae obscurely 

 ferruginous; thorax without metallic reflection, finely and rather thickly 

 punctured ; elytra with a longitudinal yellow band on each, which is 

 almost straight on its inner side, and moderately deeply emarginate 

 externally in a semi-oval ; the black space on disc between the yellow 

 bands is very broad and almost parallel-sided ; the species rather closely 

 resembles P. tetrastigma, but has the punctuation of the thorax and 

 elytra closer, the punctures of the latter being arranged in more distinct 

 lines. L. 2-2J mm. 



