1880.] 401 [Patton. 
The area on the dorsal valve of the males has deep scattered 
punctures in both Cerceris and Lucerceris; but in the females 
the punctures are shallow and confluent. Ewcerceris used as a gen- 
eric name is a misnomer. The name could properly apply only to 
the typical section of Cerceris, which this genus is not. 
APHILANTHOPS fn. ¢. 
Type: Aphilanthops frigidus ; (Philunthus frigidus Smith, Cat. Hym. 
Brit. Mus., 1v, 475, ¢). 
$. Front above the antennae not prominent; antennae inserted 
above the middle of the face, and distant from the clypeus, approxi- 
mate; sides of the clypeus limited above by a transverse suture, 
and with no suture separating them from the median lobe, not 
attaining the eyes laterally; edge of the clypeus laterally with a 
loose fringe of erect hairs, the face pubescent, edge of clypeus three- 
toothed ; labrum concealed, its breadth twice as great as its length, 
slightly sinuated in the middle of the anterior margin; mandibles 
slender, without teeth; eyes entire. Venation of anterior wings as 
in Philanthus, but the second submarginal cell shorter, and the 
third submarginal cell more narrowed towards the marginal than is 
usual in that genus; the submedial cell of posterior wings falling 
far short of the medial cell on the externo-medial nervure. Anterior 
tarsi with a short fringe of bristles; posterior coxae with the apo- 
physes minute and slender; the tibiae not sharply serrate, and the 
posterior femora not terminating in a flange. Segments of the 
abdomen slightly constricted, first segment not nodose; apical seg- 
ment with no enclosed area or disk, depressed; the eighth ventral 
seoment extending beyond the seventh dorsal. 
9. Agrees with the male in all except sexual characters, and the 
following: edge of the clypeus with five prominent teeth; anterior 
edge of labrum straight, not sinuate; anterior tarsi fringed with 
long spines; a flattened and very broad enclosure on the sixth dorsal 
segment. 
To this genus it is probable that P. laticinctus Cress., and 
P. albopilosus Cress. also belong. 
From Nectanebus Spin. which this genus resembles in many res- 
pects, Aphilanthops differs in the pointed marginal cell, in the 
approximate antennae, in the absence of an enclosure on the apical 
segment of the abdomen in the male, in the enclosure present in the 
DY) , PA 
1 4g, gihos, GvO06, OY. 
PROCEEDINGS B. 8. N. H. — VOL. XX. 26 NOVEMBER, 1880. 
