260 NaTuRAL History BULLETIN. 
excavation a transverse groove not connected. The third 
segment bears before the middle, two tubercles mutually dis- 
tant one-half its width. 
Habitat. Texas. Unknown to us. 
DECARTHRON, /Prendel. 
Disk of the vertex longer than wide, quadrate, or less nar- 
rowed in front than in Bryaxis, the frontal foveze wanting. 
Antenne ten-jointed, the joints entirely rounded, excluding an 
ankylosis of any two. The prothorax is subglobose, the sides 
rounded, a single rude funnel-shaped fovea being situated 
near the middle of the base. The elytra are very broad 
shouldered, the base bifoveate, the sutural lines always 
straight, parallel, the discal lines divergent from the base and 
parallel in the posterior half. Abdomen short and wide, the 
basal dorsal segment not less than one-third as long as wide, 
the carine distant, parallel, almost entire. The intermediate 
thighs of the male are dilated, constricted in the distal half. 
The following table will serve to separate our species: 
a1 Form of body, broad, robust. 
61 Pubescence long, erect. 
Occipital fovee large, front depressed, connected with the foveze 
by faint convergent sulci. Length, 1.4 mm. Color, black. 
¢ femoral mark small near the end. - - abnorme. 
Occipital foveze small, lateral grooves parallel, dividing the front, 
which is not depressed, from the superantennal tubercles, the 
interval punctured. Length, 1.6 mm. Color, dark red. 
4 femoral mark large spinous near the middle. - exsectum. 
52? Pubescence short. Male femoral marks small. 
Occipital fovez none, lateral groove interrupted, frontal space 
plane, punctured. Length, 1.7 mm. Color, brown, drendellt. 
Occipital fovez faint, pubescence very dense, hiding the sculp- 
ture of the entire upper surface. Length, 2 mm. Color, 
brown. - - - - - - . - stvenuum. 
a? Form, slender elongate, occipital fovee present. 
c1 Prothorax impunctate. 
Abdominal carinz including more than one-half the segmental 
width. Color deep yellow. ¢ femoral spine short, near the 
distal end. - - - - - - - longulum. 
