New Genera and Species of Phytophaga. 433 
very pale yellowish-white spots ; in addition, near the outer border, 
is a broad irregularly-defined submarginal stripe of the same 
colour ; this stripe, commencing at the humeral angle, continues 
entire for two-thirds of the length of the elytron, it then becomes 
gradually broken up and lost in the general colouring of the surface. 
Four hinder tibiz armed each with a short stout obtuse tooth. 
Genus Nortozona, Clark. 
Notozona histrionica, 
Anguste ovata, valde convexa, corallina, nitida; antennis ex- 
trorsum scutelloque nigris ; antennarum basi elytrisque flavis, 
his regulariter punctato-striatis; margine Jaterali, sutura 
ad apicem, maculis magnis tribus (duabus infra basin, una 
ante apicem), fasciaque lata centrali utrinque abbreviata, 
nigris; femoribus posticis subtus unispinosis, ' 
Long. 4 lin. 
Hab. Mexico. 
Antenne rather more than half the length of the body, five upper 
joints black, the basal one fulvous, the remaining joints, toge- 
ther with the base and apex of the seventh, yellow. Thorax 
three times as broad as long, sides slightly rounded and con- 
verging from base to apex, anterior angles produced into a slightly 
recurved subacute tubercle; hinder angles distinct, obtuse ; 
basal margin sinuate on either side near the middle portion, 
which is obtusely lobed; upper surface faintly excavated within 
the lateral border; the base impressed on either side with an 
indistinct fovea; on the hinder disc, just in front of the 
base, is also a small shallow depression ; surface minutely but not 
closely punctured ; on the middle of the thorax is a single semi- 
circular row of larger punctures, which, commencing on either 
side on the apical border, extends backwards two-thirds across the 
disc. Elytra impressed each with eleven rows of distinct punc- 
tures, placed in a single regular line on each row, the first row 
short, interspaces smooth, impunctate, very faintly convex, the 
extreme lateral margin, together with the hinder half of the suture, 
narrowly edged with black; at the apex of the lateral border, as 
also on the suture, a very narrow line of rufous is interposed 
between the black colour and the edge of the elytron, so that the 
black line becomes submarginal ; on each elytron are three large 
black patches and a broad transverse band of the same colour; 
this band, which is placed across the middle, is abbreviated on 
both the extreme sutural and lateral borders; of the patches 
