228 Natural History Bulletin. 



slender, half the length of the tibias, which are longer than 

 the femora, joints two and three equal in length. Claws equal 

 in length but not in strength. 



Habitat. Ohio river to the Great Lakes. 



Cedius, Leconte. (^Kr/Siior, careful). 



Antennal tubercles transverse contiguous, antennae eleven- 

 jointed. Palpi with the last two joints unequal, cotvledonous, 

 the third triangular or lunate acuminate inside; fourtli thick, 

 oblong or triangular free angles rounded. Tarsi with the last 

 two joints equal, claws two, equal, anterior femora strongly 

 tri-spinous. Body robust compact. 



C. ziEGLERi, JLec. Umber brown, punctate, pubescence 

 appressed, short and dense. Length 2.7 mm. PI. VL, Figs. 

 II and 11^. 



Head from base to frontal margin equal in length to the 

 width just behind the eyes, tempora not prominent, nearly 

 straight, convergent, shorter than the large prominent coarsely 

 facetted eyes; frontal tubercles transverse, half as long as 

 wide, separated by an ample sulcus which extends half way to 

 the base. Disk between the eyes convex, punctured, with 

 two circular foveae in the line of the posterior margins of the 

 eyes and twice as distant from one another as from the eyes. 

 On the under surface of each side behind the eyes is a 

 strong prominent spine. Clypeus convex, rounded anteriorly. 

 Palpi with the second joint as long as the third or 

 fourth, curved, fusiform; third triangular, the basal and free 

 angles acute, the sides including the latter angle longest, 

 apical angle rounded. Fourth joint fusiform sides arcuate. 

 Antenna nearly half as long as the body, robust, the first 

 joint as long and wide as the frontal tubercles; second, third, 

 and fourth equal, as long as wide; fifth smaller, subglobular; 

 sixth and seventh globular subequal; eighth shorter, transverse, 

 and differing in the sexes, that of the male having the inside 

 prolonged into a very long, sharp, flat tooth, reaching to the 

 base of the tenth joint. Ninth obconical, twice as wide as the 



