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



Thorax twice as broad as long ; sides parallel at the 

 base : thence rounded and converging to the apex ; disk 

 finely punctured, sides more deeply excavated at the base 

 than in Ch. speciosa, coarsely punctured. Elytra broader 

 than the thorax, parallel in the $ , slightly dilated poste- 

 riorly in the $ , rather strongly aciculate-punctate ; inter- 

 spaces nitidous, less strongly wrinkled than in allied 

 species, basal joint of the anterior pair of tarsi in the $ 

 semiovate, scarcely longer than broad, gradually in- 

 creasing in length in the two hinder pairs, in the third 

 twice as long as broad. 



All the specimens agreeing in coloration with Suffrian's 

 description (which is probably that of a local form) came 

 from Italy; the other vai'ieties of colour Avere brought 

 from the Swiss Alps. I have received the species from 

 Maerkel's collection under the names of vittigera and 

 pretiosa, Suffr., and luctuosa, Duft. 



In punctuation this insect more closely resembles Ch. 

 speciosa than any of the other species of the subsection ; 

 both sexes may be at once separated by the peculiar form 

 of the apex of the anal segment of the abdomen. In the 

 larger females, the elytra are more parallel and less dilated 

 posteriorly than in fully-developed specimens of speciosa, 

 but this character in a long series of individuals would 

 probably be found inconstant; from nivalis, with which 

 it agrees in the broader apical joint of the maxillary 

 palpus, the different relative length of the basal joint of 

 the tarsi in the three pairs of legs will at once distin- 

 guish it. 



Chrysomela sulcata, Gebl. 



Mem. Mosc. vi. 1823, p. 123. 



Anguste elongato-ovata, metallico-caerulea aut viridi- 

 fenea, thorace sat fortiter, subcrebre punctato, lateribus 

 incrassatis, sulco longitudinali intus marginatis, sulco 

 medio interrupto, basi magis profunde excavato, rude 

 foveolato-punctato ; elytris ovatis, subcrebre aciculato- 

 punctatis, interspatiis rugulosis ; utrisque sulcis latis lon- 

 gitudinalibus tribus, leviter excavatis, instructis. 



Var. A. Elytrorum sulcis obsoletis. 



Ch. hasilea, Gebl. Mem. Mosc. vi. 1823, p. 122. 

 „ Germ. Ins. Spec. Nov. 1823, p. 594. 



Mas. — Tarsorum anticorum quatuor articulo basali 



