THE PsELAPHIDA OF NorTH AMERICA. 237 
HTead with the frontal incision reaching the oblong frontal 
fovea, occipital fovez large, farther apart and nearer the eye, 
tubercles on each side of the frontal fovee conspicuous, 
occiput elevated. Prothorax as long as wide, narrower 
anteriorly than in the other species, widest a little behind the 
middle; the median fovea is nearly circular the lateral ones 
small, the lateral sulcus is a fine line not perceptibly separat- 
ing the narrow margin. &/ytra more convex, the lines not 
deeply impressed, shoulders more rounded, otherwise as in 
Cz piceus. Habital : Southern States 
Tyrus, Audé. 
Antenne clavate, palpi with first joint minute, second 
long, arcuate, clavate, third short, obovate, the last joint 
longer than the third and mucronate at apex. Third tarsal 
joint longer than the second, with two equal claws. Form 
robust, compact. Pubescence long, not squamiform. 
T. HUMERALIS, Aubé. Piceous-black, pubescence fine, short, 
appressed; elytra, antenne and legs reddish, palpi paler. 
Length, 1.6 mm. Plate VI., Fig. 19. | 
ffead, eyes included as long as broad, frontal tubercles 
transverse, divided by a sharply cut line, faintly connected 
with the oblong anterior fovea. Between the eyes are two 
small fovez not connected by a depression. Palfz with the 
second joint long, strongly clavate at the end, third obovate as 
large as the club of the second, fourth joint larger, ovate, 
mucronate at the apex. Antenne with joints one and two 
cylindrical, the first larger, three to seven rounded, gradually 
becoming smaller, eighth and ninth larger, globular, tenth twice 
as long and thick as ninth, rounded obconical, eleventh the 
largest, ovate in the male; in the female the joints three to nine 
are subequal, tenth larger, less rounded, eleventh oval. Pro- 
thorax bell-shaped, wider near the middle, where it is as wide 
as long, sides behind the middle straight or very slightly sin- 
uate, base nearly as wide as the middle, neck a little more 
than half as wide, evenly vaulted. One-fifth of the length 
