116 [August 



basal segment of the abdomen is generally immaculate, rarely with two 

 yellow spots as in the female ; the band on the second segment is gene- 

 rally of equal breadth, sometimes slightly narrowed on the anterior 

 middle ; the subapical fasciae on the remaining segments are very 

 narrow, widening a little on each side, and sometimes slightly inter- 

 rupted in the middle, generally on the sixth segment, which has some- 

 times an ovate spot on each side; the second, third and fourth ventral 

 segments have sometimes a small yellow spot on each side, sometimes 

 reduced to a mere dot, but generally wanting. Length 4 J — 6 lines; 

 expanse of wings 7 J — 9? lines. 



Hah. — Massachusetts (Ridings, Stratton) ; New York (Angus) ; N. 

 Jersey, Pennsylvania (Cresson) ; Delaware (Dr. Wilson) ; Virginia 

 (Ridings); Illinois (Kennieott and Walsh) . Coll. Ent. Soc. Philud. 

 and Chicago Academy of Sciences. 



Eleven 9 , twenty-one % specimens. In the female the clypeus va- 

 ries much in shape, beiag more or less produced, sometimes subporrect 

 and elongate-quadrate, with the concave under surface hid fi-om view ; 

 while in other specimens the projection is very short, with the entire 

 under side visible ; the apical margin varies from truncate and arcuate, 

 to deeply emarginate, the lateral angles forming subacute teeth. 



3. Cerceris venator, n. sp. 



Black; face, interrupted line on collar, line on postscutellum, broad band 

 on second abdominal segment, more or less emarginated on anterior middle, 

 and narrow apical margins of remaining segments, yellow ; legs fulvous and 

 yellow: wings subhyaline, apical margins fuscous. 



Male. — Black, i-ather closely and deeply punctured, clothed with 

 a golden-yellow pubescence, much paler and somewhat whitish on the 

 pleura, metathorax and abdomen ; the face entirely, basal half of man- 

 dibles, spot on the scape of antennae in front, interrupted line on the 

 collar, transverse line on postscutellum, and tegulaj, yellow; antennas 

 black, tinged more or less with ferruginous at base, the apical joint 

 curved, and truncate at tip; the triangular enclosed space of the meta- 

 thorax, smooth and shining, with a finely impressed line down the 

 middle. Wings subhyaline, slightly tinged with honey-yellow, and 

 with a more or less brilliant violaceous reflection; apical margins fus- 

 cous; nervures honey-yellow. Ijcgs fulvous; anterier coxse, trochan- 

 ters and femora beneath except tips, and the four posterior femora at 

 base within, more or less black ; the anterior tibiae and tarsi more or 

 less, the four po.sterior coxie and trochanters beneath, base of the pos- 

 terior femora, the intermediate tibite and tarsi, a line on the posterior 

 tibiae beneath, sometimes wanting, and their tarsi, yellow ; tips of tarsi 



