38 NatTurRAL History BuLueEtTIn. 
frontal tubercle; the vertex has in the middle, one-third of the 
length from the apex, a conspicuous circular tubercle; clypeus 
conical, this shape being brought about by the dilated anten- 
nal fovez, leaving a narrow septum in connection with the 
overhanging frontal margin, (¢.) This septum in the ¢ is not 
contiguous with the apex of the frontal margin. Awfenne as 
in parvulum; the last palpal joint is more securiform and long- 
er than in parvulum. Prothorax not wider than the head, 
length and width equal, the base less than one half wider than 
the neck; disk widest just before the middle, sinuate behind 
the small lateral foveze; transverse sulcus nearly straight, the 
median angulation small. #/ytra more convex from side to 
side than in parvulum; the sculpture is the same. Addomen 
without visible basal carine, rather long, and produced behind 
in the 9; the basal segment is not more than visibly longer 
than the second, the second ventral considerably shorter than 
the first. Legs long, rather slender. 
Habitat. Southern States. 
T. AMERICANUM, Lec. Deep yellow, very convex, impunc- 
tate; pubescence not perceptible. Length 0.6 mm. 
flead narrower than the prothorax, tempora prominent, 
rounded, frontal margin arcuate, giving a triangular appear- 
ance to the head; corners rounded; occiput impressed; fovez 
and circumambient sulcus deep. Antenne, excluding the last 
joint, as long as the head; last joint of the palpi acuminate. 
Prothorax wider just before the middle, wider than long, 
evenly rounded from the neck to the transverse sulcus, latéral 
foveee very small. lytra convex, sides strongly arcuate, 
widest behind the middle, rather long, and rounded at the pos- 
terior lateral angle. Addomen not visibly carinate at the base, 
the first dorsal segment longer than the second. Legs rather 
short. 
Habitat. Southern States. 
T. stmpLEX, Lec. Darker, yellowish brown, prothorax red- 
brown, pubescence extremely fine and short. Form like that 
