232 NaTuRAL History BULLETIN. 
end, anterior ones in the male dilated outside in the middle, 
straight inwardly. Female the same, except that the middle 
is slightly thicker. 
Habitat. Found over the entire extent of our territory east 
of Kansas and the Missouri River and. south of the Great 
Lakes. 
T. cartnatus, Lec. Brown, densely punctate, pubescence 
short, appressed. Plate VI., Fig., 12 
Form of body, sculpture and sexual characters same as in 
T. costalis, except that the vertex has the median frontal fissure 
broader, abbreviated one-third of the length from the frontal 
margin and not connected by branches with the fovee. The 
anterior prothoracic foveze are wanting, and the abdomen has 
a medial carina extending backward over the third dorsal, 
besides the lateral ones. Length, 2.5 mm. 
Habitat. Same as 7. costalis. 
CHENNIUM Latrezlle. ( Derivation unknown. ) 
Biotus, Casey. Atinus, Horn. 
Palpi very small and short, basal joints invisible, the 
two last joints connate, forming a globular club, the last 
covering the penultimate one in the shape of a cone of 
large area’ and little height. Antenne moniliform. Pubes- 
cence short, appressed, setiform, clypeus prominent, uniformly 
convex, rounded anteriorly, prothorax wider than the head, 
tri-foveate. Elytral impressed lines very long, nearly entire, 
second dorsal longer than the first. 
CH. MONILICORNE, Lrend. Cinnamon-brown, strongly punc- 
tate, pubescence short, dense, appressed, prothorax as long 
as wide. Length, 2.8mm. Plate VI., Fig. 15. 
flead conical, punctured, widest Hetweeh the eyes, which 
are prominent, with fine facets; distance from frontal margin 
to base, one-half longer than the width between the eyes and 
about equal to the width of the head, eyes included; tempora 
not prominent, convergent, frontal tubercles together half as 
