324 Natural History Bulletin. 



continue the work until at least all of our most interesting 

 American species have been figured, and any good material 

 for the purpose will be very welcome. 



CYBISTER. 



Three basal joints of the male anterior tarsi dilated, form- 

 ing a disk somewhat regularly transversely elliptical in shape, 

 furnished with four rows of palettes, similar among them- 

 selves; the first joint bearing also a patch of pubescence of 

 varying size. 



Cybister explanatus Lee. Plate VI, Fig. 4. 



Three dilated joints nearly equal in width, the basal one a 

 little wider than both the others taken together. Palettes in 

 four transverse series, the first situated just in front of the 

 pubescent area, consisting of fourteen palettes and not extend- 

 ing quite across the joint; the second extends quite along the 

 distal margin of the joint and consists of nineteen palettes; the 

 third and fourth series occupy a corresponding position on the 

 second and third joints respectively, and contain twenty-one 

 and twenty palettes. The pubescent area occupies the base 

 for a little more than one-half the length of the joint. Speci- 

 mens studied from Yuma, Cal. 



Cybister fimbriolatus Say. Plate V, Fig. 2. 



A little larger than the preceding, but resembling it very 

 closely in details. The first and second series have respect- 

 ively fifteen and twenty palettes, while the third and fourth 

 contain the same number as the corresponding rows in C. 

 explanatus. Specimens studied from Iowa City, Iowa. 



Cybister tripunctatus Oliv. {africanus Lap.) 



A prepared anterior tarsus of this species differs from either 

 of the preceding as follows : The first series consists of nine- 

 teen palettes, the second of twenty-two, the third of twenty- 

 two and the fourth of twenty-three. The pubescent area is 



