28 W. G. DIETZ, M. D. 



pwidatm Lee. and D. brevicornis Lee. have been omitted, the first 

 cannot be separated from rujipennis Kby., while the seeond is identi- 

 cal with frontalis Zimm. Bnt one new species is added to the list. 



I have omitted all references to bibliography and have simply 

 confined myself to such remarks as will enable the student to realize 

 the results aimed at in this paper. 



Clava* subrhomboidal, third suture always distinct, remote from tbe apex. 

 Outer joints of fuuicle more distinctly widened, figs. 1 and 2. 

 Scape of antennae triangular, apical angles acute; second joint of funicle 

 longer than the first, fig. 1. Median segment of epistoma short, broad, 

 concave; shorter than the lateral ones; lateral edge obHque, ending 

 anteriorly in a smooth tubercle, fig. 1 a. Hairs of moderate length. 



terebrans. 

 Scape clavate, apex rounded ; first and second joints of funicle of about equal 

 length, fig. 2. Median segment of epistoma longer and narrower than 

 in terebrans, scarcely concave, as long as the lateral segments, fig. 2 a. 

 Rostrum more or less distinctly carinate. Hairs long.. ..riifipenilis. 

 Clava transversely oval; first and second suture distinct, third subapical or in- 

 distinct; funicle with the outer joints less distinctly widened, scape 

 clavate, figs. 3-6. 

 Median segment of epistoma narrow, extending slightly beyond the lateral 

 segments; sides parallel, or nearly so, fig. 3 a. Club distinctly trans- 

 versely oval, sutures curved, fig. 3 similis. 



Median segment rhomboidal, not extending beyond the lateral ones; sides ob- 

 lique, figs. 4 a and 5 a. 

 Median segment less strongly narrowed anteriorly, as long as the lateral 

 segments, not concave, fig. 4 a. Sutures of club straight, fig. 4. Front 

 convex, not channeled. Thorax strongly narrowed anteriorly. Hairs 



conspicuous simplex. 



Median segment strongly narrowed from the base, scarcely as long as the 

 lateral ones and more or less concave, fig. 5 a. Sutures of club curved, 

 figs. 5 and 6. Front channeled. Thorax feebly narrowed anteriorly, 

 finely punctured. 

 Larger; second joint of funicle longer than first, fig. 5. Hairs long, dis- 

 tinct approxiuiatus n. sp. 



Smaller; second joint of funicle not longer than first, fig. 6. Hairs in- 

 conspicuous frontalis. 



■■ Normally, the club is simply compressed, not concave on its anterior face, as 

 spoken of by Dr. LeConte in reference to several species. The concavity when 

 existing is due to shrinkage; any reference to sutures, etc., ajiplies only to the 

 normal structures, as the shrinkage gives rise to irregularity. 



