216 Trans. Acad. Sci. of St. Louis 
Reduvius personatus L. [A. T. McAtee]. This pro- 
tectively colored bug, concealed in a crevice was sucking 
the life-blood from a pioneer inhabitant, Ancistrocerus 
fulvipes, on June 28, 1920, and earlier in these pages I 
state that this bug was oS upon by the spider, 
Ariadna bicolor. 
Arachnida. 
Phidippus. clarus Keyserling. [C. L. Shoemaker]. 
One specimen was found on the bank on July 16, 1917. 
It was probably in quest of food. This is one of the 
‘‘wandering’’ spiders, and its wanderings into the unit 
were evidently not without purpose. 
Phidippus sp. [J. H. Emerton]. A female actually 
made a permanent home in one of the burrows, where 
her face could often be seen peering from the doorway, 
and occasionally she would catch and devour a Chalcid. 
Phidippus tripunctatus [J. H. Emerton]. One young 
one feeding upon a visiting male cricket Hopithus agt- 
tator Uhler. [A. N. Caudell], on September 6, 1919. 
Prosthesima sp. [J. H. Emerton]. A female was walk- 
ing on the bank, June 28, 1920. 
Thanatus lycosoides Emerton. [C. L. Shoemaker]. One 
specimen found at the base of the bank on September 
23, 1917. 
Habrocestum pulex Htz. [J. H. Emerton]. One speci- 
men on the bank September 23, 1917, feeding upon an 
ant, Crematogaster lineolata. 
Lycosa scutulata Htz. On July 30, 1917, at twilight, 
a male of this spider was quietly resting at the 
base of the bank. The Lycosidae are popularly know? 
as wolf spiders; they are vagabond, hunting spiders, 
spinning no snare but chasing their prey upon the 
