48 GEO. H. HOIIN, M. D. 



Taken by Mr. E. A. Schwarz on the borders of Great 8alt Lake 

 in coni|)any with Mecyuotarsus Candidas nm] Tanarthrus salieola. 



HIl'ODITES Latr. 



Of this genus hardly sufficient material has accumulated to speak 

 authoritatively on the limits of variation in the species. Certain 

 })oints have been observed which it seems advisable to indicate for 

 the use of those more fortunate in the acquisition of specimens. 



From my observation they seem to divide as follows: 



Front joint of hind tarsus not mncli longer than the next two and scarcely twice 

 as long as broad. 



Thorax quite smooth ; abdomen of male black, female yellow Popeiioi. 



Thorax closely punctate; abdomen black in both sexes liileipeiiiiis. 



First joint of hind tarsus slender, more than twice as long as the next two and 

 more than twice as long as broad. 

 Elytra entirely yellow and comparatively smooth. 



Abdomen yellow 9 , black % sv.ixhvr. semiflnvm. 



Abdomen black, % and 9 iievadicus, crt?»/oni».ais. 



Elytra partly, or almost entirely piceous, more or less scabrous. 



fasciatus, flavicomis. 

 amerlcanns, stylopides. 

 Wahihii, Zeschii. 

 Schwarsii. 



The male of scaber has a black abdomen, the antennae and legs 

 pale yellow. 



The j)receding table is given as a tentative study and not with ab- 

 solute certainty as to the synonymy, but with the hope that, as addi- 

 tional material may become known to me or others, something nearer 

 accuracy may be attained. 



It is, however, quite probable that the seven names included under 

 fusciatiis are mere variations of one form. It is equally certain that 

 one character on which LeConte placed some reliance must be aban- 

 doned. The form of the vertex differs in the sexes, that of the male 

 being acutely prominent, while the females of the same are obtuse 

 or nearly flat. 



Dr. LeConte seems to have been in doubt about amerlc.mms and 

 flavicomis. Of the former I think there can be no doubt, while the 

 yellow male antennaj are sometimes observed in the forms grou])ed 

 under fasciatus, which agree very well with Say's description. 



For the genus Myodites, Mr. Champion has adopted the name 

 Rhipidophorus, and for that known by us as Rhipijthorus, the name 

 Emenadia, 



