306 
[November 
feet rufous; thighs black at base ; wings dusky, particularly on the 
margin of the terminal half; tergum rufous, the segments on their 
posterior margins, and the basal segment at base also black; second 
segment with a large, lateral yellow spot, and a slight appearance of 
another on each side of the third segment. Length rather more than 
three-tenths of an inch. 
“ This species varies in having the thorax black, with four ferrugi¬ 
nous lines. 
“ The male has the head black, with the nasus and mouth yellow; 
antennae beneath, rufous; the thorax has hardly any appearance of 
ferruginous, but the scutel in some specimens is of that color; the 
thighs, particularly the posterior pair, have more black than those of 
the female. 
Var. Abdomen rufous, immaculate.” 
I have before me 4 9 and 3 % specimens (Baltimore, Coll. Ent. Soc. 
Philad.; Illinois, Coll. Mr. Walsh; Connecticut, Coll. Mr. Norton) 
which probably belong to this species, as they answer to Says’ descrip¬ 
tion, above quoted, very well. All the specimens, except one, have 
the yellow spot on each side of the third segment of the abdomen 
above, and two specimens have the four ferruginous lines of the thorax 
distinct. The males are smaller (3 lines) and more slender than the 
females, and the yellow spot on each side of the second abdominal seg¬ 
ment is very large and almost meeting on the disk. Some 9 varieties 
of W. maculata n. sp., resemble those of this species, but as their an- 
tennm are longer and more robust, I think they are distinct; a large 
series of specimens, however, are required before a correct division of 
these allied varieties can be made. The variety with the “ abdomen 
rufous, immaculate,” mentioned by Say, is probably referrable to W. 
incerta n. sp ? 
26. N. perplexa n. sp. 
Female. Head dark ferruginous; deeply, coarsely and confluently 
punctured; a large spot in front about the base of the antennae confluent 
with a transverse one which encloses the ocelli, the throat, cheeks 
except orbits of the eyes, and the occiput, black. Antennae as long as 
the head and thorax; dark ferruginous varied with blackish behind, 
apical joint paler, sometimes tinged with yellow; scape black, ferrugi¬ 
nous at base. Thorax dark ferruginous, deeply, coarsely and conflu- 
