1927] 
The North American Species of Ryhaxis 
225 
in my collection from Tyngsboro Mass, and Kittery Point, 
Maine. A male from the last named locality sent to Mr. L. L. 
Buchanan at the National Museum for comparison with Casey’s 
type he finds to be closely in agreement therewith in ail essentials. 
In his description Casey says the terminal antennal joint is as 
long as the four preceding, but careful measurements made by 
Mr. Buchanan prove it to be distinctly shorter than the four pre- 
ceding joints, as is usual. Casey’s unique type is from Rhode 
Island. 
Rybaxis varicornis Brendel. 
Very similar to Mystica and scarcely separable except by 
the male characters, the females being virtually indistinguishable. 
The antennal club in the male does not differ from that in the 
female. Dorsal abdominal carinae as in mystica ; anterior tro- 
chanters of male unarmed; metasternal processes anterior in 
position, behind the middle coxae, well separated; ventral plate 
very small, as long as or slightly longer than wide, narrowed in 
front. 
This is the species which Brendel erroneously assumed to be 
the conjuncta of Le Conte, arid which he distinguished from 
clavaia by its unmodified antennal club and simple anterior tro- 
chanters in the male. The name varicornis was proposed for a 
variety with the terminal joint of the club yellow. This paler 
last joint is by no means peculiar to the present species, but 
occurs not rarely in at least three or four others, usually in the 
darker colored specimens. The name varicornis is used for this 
species because available, though very little credit attaches to 
Brendel for his connection therewith. 
This is a common species in Massachusetts, and ranges west- 
ward through southern Canada at least to Illinois. It is probably 
more widely dispersed, but the confusion of species in this genus 
renders many of the records uncertain. 
Rybaxis geminata sp. nov. 
Antennal club not differing n the sexes; dorsal abdomnal 
carinse separated at tip by VL the discal width of the segment; 
