40 
FF Elytra black or ferruginous without distinctly defined black spots; 
metasternum not dentate in either sex. 
G Short, stout, mostly black. 
H Elytra with humeral, triangular red spots. 
(18) scapularis Yan D. 
HH Elytra entirely black. (19) swainei Hop. 
GG Elongate, pale, elytra ferruginous with two indistinct, somewhat 
darker lateral spots. (20) impura Lee. 
AA Pronotum with basal angles obtuse. 
B Pronotum but little narrowed in front, broadly constricted in front and behind. 
C Pronotum with disk distinctly convex, basal transverse impression deep. 
D Pronotum with disk strongly convex, without lateral impressions: base of 
elytra very strongly sinuate, more or less cuneiform; forecoxal cavities 
open behind; first hind tarsal segment without pubescent sole. 
E Elytra black and testaceous, vestiture long and distinct on pronotum, 
distinct on elytra; pronotum and elytra rather finely punctured. 
F Form stout; pronotum opaque, closely punctured and hairy; 
elytra less than 2$ times as long as wide; 3rd hind tarsi short, 
buobed, cleft nearly to the base. 
G Pronotum with basal angles feebly but distinctly flaring, densely 
clothed with decumbent, bright golden pubescence. 
( Strophiona Cey.) 
H Antennae slender, segments 7 to 10 three times as long as 
wide; Eastern species. (21) nitens Forst. 
HH Antennae stout, segments 7 to 10 about twice as long as wide; 
Western species. 
I Bather slender species; pronotum, 9, length equal to 
width, d\ length distinctly greater than width; basal 
angles rounded and but feebly prominent, transverse 
basal impression rather shallow with margin not very 
sharply defined; elytra more sparsely punctured. 
(22) tigrina Csv, 
II A stout species; pronotum, 9 , wider than long, d\ as wide 
as long; basal angles subacute and prominent, trans- 
verse basal impression wide, deep, and abrupt. 
(23) laeta Lee. 
GG Pronotum with basal angles parallel on the sides, not flaring, 
clothed with long, erect, pale pubescence. (Xestoleptura Csy,). 
H Antennae stout; elytra with basal, transverse, black band 
straight and entire across the suture; antennae, legs, and 
abdomen ferruginous. (24) crassicornis Lee. 
HH Antennae slender; elytra with basal black band, when 
present, interrupted or oblique; antennae and legs black 
or testaceous. 
I Pronotum subopaque, very densely punctured, the basal 
transverse impression moderately abrupt, the median 
line usually strongly impressed; elytra closely punctured. 
(25) tibialis Lee. 
II Pronotum shining, with the basal transverse impression 
not abrupt, the sides of the impression oblique, the 
median line at most only feebly impressed; punctation 
on pronotum and elytra only moderately close. 
J Base of elytra with scuteflar lobe more strongly pro- 
duced than the humeral; the hind tibise of the male 
with only one well-developed spine. 
(26) crassipes Lee. 
JJ Base of elytra with scuteflar and humeral lobes equally 
and rather feebly developed; tibial spines normal. 
(27) bekrensii Lee. 
FF Form very slender, pronotum smooth and shining, very finely and 
sparsely punctured; elytra with predominating colour black, 
almost three times as long as wide; 3rd hind tarsi three times as 
long as wide and emarginate at apex. (28) octonotata Say. 
