250 Wisconsin Academy of Sciences, Arts , and Letters. 
margin of the falx, while solitarius has three large teeth. In 
Marshallii the total length is 6.5 mm, and the fourth leg 9 
mm. In ichneumon the total length is nearly 8 mm, and 
the fourth leg 6 mm. In solitarius the total length and the 
length of the fourth leg are both 4.5 mm. The two females are 
distinguished by their color and the epigynes. 
Myrmarachne ichneumon E. S. 
$. Length 6.6 mm. Legs 4132. 
The front eyes are close together, in a row which is curved 
downward, the middle being nearly twice as large as the lat¬ 
eral. 
The spider as a whole is yellow. The eye-region is black, 
and there seems to have been a white band in the postrocular 
constriction. The pedicle is long. The first third of the ab¬ 
domen, which is square, and ends in a raised ridge, seems to 
have been covered with white hairs. The middle third is cov¬ 
ered with white hairs, and the posterior third is dark in front 
and covered with white hairs behind, excepting a dark line 
around the base of the spinnerets. The legs are yellow, with 
a longitudinal black line on the anterior faces of the patellae 
and tibia?., and a similar but less distinct line behind. 
We believe that only the male of this species has been de¬ 
scribed, up to this time. We have several females, as well as 
a male, from Mashonaland, where they were collected by Mr. 
Marshall. 
Myrmarachne solitarius sp. nov. 
Plate. XXIX, figs. 5, 5a. 
Length, 3. 4.5 mm. 9. 5 mm. Legs 4132. 
The front eyes are close together in a row which is a little 
bent downward, the middle being nearly twice as large as the 
lateral. The pedicle is long. 
The whole spider is dark colored. There are two constric¬ 
tions, one just behind the third row of eyes and one near the 
front end of the abdomen, and each of these is encircled with 
