1880.] 883 [Patton. 
as in the female, angular anteriorly, the apical half having a median 
carina which forms a point at the apex, this carina less distinct than 
in the female, no distinct median area. In the male the apical ven- 
tral segments are concave, the fifth, sixth and seventh pubescent, 
with the pubesence at the sides long; the seventh ventral segment 
distinctly sinuated. | 
My specimen of flavipes, from Eastern Tennessee (E. M. 
Aaron), differs from Smith’s description as follows: Length, 21 mm. 
(not 13 lfnes); disk of clypeus glabrous, face clothed with a dense 
brownish pile, and sprinkled with long hairs of the same color ; 
apical margin of labrum not exactly ‘‘ rounded ”’; the pubesence of 
thorax not “ golden’”’ but brownish, and on the metathorax white ; 
the tegulae ferruginous (a character not mentioned by Smith); the 
abdomen not entirely opaque; the apical joint of tarsi and the claws 
shaded with fuscous. But all these differences excepting the size, 
the ferruginous tegulae and dark tarsal tips, and possibly the rounded 
labrum, may be due to this specimen being worn and faded. The 
color of the tegulae and tips of the tarsi may easily have been over- 
looked, or may vary. 
Two males, received with the female, differ from Smith’s descrip- 
tion of the female (the male not previously described), as follows: 
Length, 20 mm; all the pubescence white; tegulae tinged with pi- 
ceous; apical joint of the tarsi and the claws blackish; wings sub- 
hyaline; in one specimen the face golden. 
Sphex pennsylvanica Linn. | 
Clypeus of the female with two obtuse crenations in the middle of 
the anterior margin, representing the slight lobes of ichnewmonea; 
clypeus of the male obtusely crenate on the anterior margin. La- 
brum of the female slightly rounded anteriorly, the carina not form- 
ing a point at the apex, median and basal portion roughened ; 
labrum of the male with the edge nearly straight, the basal and 
middle portions polished, not roughened, but with no distinct indi- 
cation of areas. In the male the apical ventral segments are con- 
vex; the eighth seoment and the sides of the seventh with a dense 
velvety pubescence; the seventh ventral segment entire, or very 
slightly sinuate. 
HARPACTOPUS Smith. 
American type: H. rufiventris (Cress.) Patton. 
Clypeus in both sexes with a broad sinus on each side, the cen- 
tral portion broadly produced and truncate. Labrum of female 
