226 
Psyche 
[December 
anterior trochanters of male with a minute denticle beneath, 
well back from the apex; metasternal processes anterior, short, 
rather blunt and closely approximate; ventral plate subrect- 
angular and rather less than twice as wide as long. The short 
anterior approximate metasternal processes are unique in the 
genus, and the tooth of the front trochanters is more minute and 
more remote from the apex than in any other species. 
The type (c?) is one of four specimens from St. Vincent Pa., 
submitted by Mr. Liebeck, who kindly permits me to retain it. 
Rybaxis arkansana sp. nov. 
Antennal club unmodified in the male; dorsal abdominal 
carinse separated at base by not more than l/ 5 the discal width 
of the segment; anterior trochanters of male with a small apical 
tooth; metasternal prominences posterior in position, but ill dev- 
eloped and consisting merely of rounded tumidities; ventral 
plate small, evidently transverse in the type, but apparently as 
long as wide in a second specimen. 
This is one of the smallest species of the genus, and suffi- 
ciently distinct by the tabular characters. 
Described from two males from Arkansas (Carlisle) col- 
lected many years ago by Stromberg. 
