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. carixatus, Lee. 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 frohtal 

 margin and not connected by branches with the foveee. The 

 anterior prothoracic foveee are wanting, and the abdomen has 

 a medial carina extending backw^ard over tht third dorsal, 

 besides the lateral ones. Length, 2.5 mm. 



Habitat. Same as T. costalis. 



Chennium LatrciUe. (Derivation unknown.) 

 Biotas, Casey. Atinns, 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. Antennas 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. moxilicorne, Brend. Cinnamon-brown, strongly punc- 

 tate, pubescence short, dense, appressed, prothorax as long 

 as wide. Length, 2.8 mm. Plate VI., Fig. 15. 



Head conical, punctured, widest between 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 



