402 
[February 
longer than the upper and very slightly notched on each side near the 
tip which is obtusely pointed j ventral segments black, sometimes 
stained with rufous and having a posterior white marginal fringe, some¬ 
times slightly interrupted in the middle. Length 5 lines. 
Male .—Like the female, except that the face is densely clothed with 
yellowish-white pubescence; the extreme lateral apical margin of the 
sixth segment produced into a short blunt tooth, the apical segment is 
produced into two bifurcate processes, the upper teeth short and obtuse, 
the lower^teeth longer, more slender and acute, also a tooth on each 
side of the segment, broad at base and rather suddenly narrowed to¬ 
wards the tip which is acute. 
Hah. —N. Y., Penn., Del, Ya. Ten specimens. Coll. Ent. Soc. 
Phila., and Mr. E. JSTorton. 
The legs sometimes varies from ferruginous to almost entirely black, 
and the white markings of the body sometimes obsolete •, the apical 
segment of the 9 abdomen of this species has the lateral margins of 
the superior plate much less suddenly narrowed in the middle than in 
C. duhitata Smith, and the inferior plate is rather shorter and broader, 
and has the slight notch on each side nearer the tip. 
4. C. brevis, n. sp. 
Female .—Head black, the face and cheeks densely clothed with 
short whitish pubescence, which is more sparse on the clypeus; an¬ 
tennae black. Thorax black, densely and roughly punctured ; a line 
on the anterior margin interrupted on the disk^ a spot behind the 
tegulae, a transverse line or two spots before the scutellum, a double 
transverse line on each side of the pleura and the sides of the meta¬ 
thorax, of short white pubescence; posterior margin of the scutellum 
rounded and having on each side a stout slightly bent tooth ] tegulae 
ferruginous. Wings subhyaline, their apical margins clouded. Legs 
ferruginous, the coxae and base of the femora black. Abdomen coni¬ 
cal, black, shining, rather densely punctured; the five basal segments 
each with an apical white marginal fringe; apical segment short, 
densely punctured, and having a longitudinal carina above towards the 
tip which is obtusely rounded, sides rather abruptly narrowed about 
the middle; the lower plate longer than the upper, broad and gradu¬ 
ally narrowed to the tip, before which on each side is a slight notch; 
ventral segments black, densely and strongly punctured, the basal seg- 
