49 
4 Inner spur of hind tibia of male anchylosed. 5 
Inner spur of male free.32 
5 Fixed spur of male short; clvpeus deeply emarginate: elongate cylin¬ 
drical, pale yellowish testaceous, head darker: abdomen of male flat¬ 
tened at middle, last ventral irregularly concave. 10.5-13 mm. 
longitarsus , Say. 
Fixed spur at least moderately long.24 
6 A marked sinuation at end of male hind tibiae, at base of fixed spur. 
in line with under surface of tibia. 7 
INo distinct sinuation at apex of hind tibiae as described.11 
7 Subcylindrical, slender, yellowish testaceous, thorax and head darker: 
claw tooth small: penultimate ventral of male abruptly declivous at 
middle. 10.5-13 mm. gracilis , Burm. 
Oblong oval, darker; claw teeth strong. 8 
8 Fixed spur boot-shaped: clvpeus feebly emarginate: thorax rather 
coarsely and sparsely punctate: penultimate ventral of male obliquely 
plicate each side of the middle, last segment with a deep concavity 
limited behind by a sharp elevated margin overhanging posteriorly. 
12-17 mm.... gibbzsa , Burm. 
Fixed spur of usual form. 9 
9 Abdomen of male at middle hairy and rather deeply channeled, last 
ventral with a rather smooth triangular impression, hind margin 
with a broad emargination, prolonged at middle in an acuminate 
point up the middle of the triangle, and closed by paler membrane: 
thoracic punctures coarse and close, denser anteriorly, a smoother 
median space. 17-18 mm. hirtiventris , Horn. 
Abdomen glabrous at middle.10 
0 Abdomen of male deeply and sharply impressed along middle, penulti¬ 
mate ventral strongly and acutely emarginate, slightly transversely 
plicate each side of median channel, last ventral with broader deep 
longitudinal impression, widening posteriorly, and ending behind in 
two black projecting lobes separated by an acute notch: thorax 
evenly, moderately punctate; color rufocastaneous to piceous. 15- 
19 mm... congrua, Lee. 
Abdomen of male flattened at middle, penultimate ventral with a 
straight transverse carina, last ventral irregularly concave, anterior 
margin elevated; last ventral of female deeply and broadly emargi¬ 
nate, impressed or eroded at middle; thorax coarsely, deeply and ir¬ 
regularly punctate; elytral punctures distinct, costm feeble: color 
brownish to castaneous. 16.5-20 mm.. affinis, Lee. 
Sexual characters as in preceding: thorax very coarsely and closely 
punctate: elytral punctures feeble, costm usually well-marked: color 
castaneous to piceous, pruinose. 17-18.5 mm. prunina , Lee. 
1 Clypeus concave, moderately reflexed, feebly emarginate.12 
Clypeus flat, narrowly reflexed, deeply emarginate.20 
2 Penultimate ventral of male without distinct elevated transverse 
ridge.13 
Penultimate ventral with distinct elevated transverse ridge, straight 
or curved. .14 
3 Penultimate ventral of male with curved rugose impressed channel 
along posterior margin at middle, in front of which is a broadly 
triangular, not elevated, rugose space, last ventral with smooth 
' cupuliform depression; body large and broadly ovate, subpruinose: 
thorax closely, rather coarsely, punctate. 15-21 mm. crassissinui, Blanch. 
Penultimate ventral with subcircular rugose impression, border widely 
interrupted behind by hind margin of segment, sometimes slightly 
elevated, last ventral with broad smooth impression: fixed spur 
rather short and broad; clypeus more distinctly emarginate: thoracic 
punctures rather coarse and sparse. 15-18 mm. inverse^ Horn. 
—4 
