Pechham—Spiders of the Family Attidae. 247 
with short yellow hairs and black spines. The first leg has 
one dark spot under the femur, and two under the tibia. The 
venter is yellow with some dark specks. 
We have numerous females from Mashonaland and Durban. 
The species is named for our friend Dr. H. V. Ogden, of Mil¬ 
waukee. 
Mexcala P. 1902. 
Plate XXIX, figs. 1-ld. 
The cephalothorax is moderately high. It widens out more 
below than above, and is broader in the posterior part than in 
front. The quadrangle of the eyes occupies a little more than 
one-third of the cephalothorax, is one-sixth wider than long, 
and is equally wide in front and behind. The anterior eyes 
are moderately large, the middle being less than twice as large 
as the lateral, and form a slightly curved row. The middle 
eves are subtouching, with the lateral a little separated from 
them. The second row is halfway between the other two. 
The third row is a little narrower than the 1 cephalothorax. The 
falces are vertical and stout, with a short fang, and have one 
conical tooth on the inferior margin. The sternum is trunc¬ 
ated in front. The first coxae are separated by about the width 
of the labium, which is longer than, wide. The pedicle is not 
visible. There are no constrictions. The abdomen is narrow 
in front and then widens. 
Mexcala is distinguished from the other ant-like genera of 
this region by having a single conical tooth on the inferior mar¬ 
gin of the falx. 
Mexcala rufa P. 
Plate XXIX, figs. 1-ld. 
$. Length 8 mm. Legs 4132, almost equal in stoutness, fe¬ 
mora slightly thickened. 
The cephalothorax is dark colored with a few black hairs 
on the eye-region, and some tiny white scale-like hairs on the 
