XRANSACXIONS 



OF THE 



AMERICAN ENTOMOLOGICAL SOCIETY 



VOLUME XIV. 



A. monograpli of the APHODIINI inliabiting the 

 United IStates. 



BY GEORGE H. HORN, M. D. 



In the volume of these Transactions for l-STO and 1871 the first 

 attempt was made at a synopsis of the Apliodiini of our fauna. The 

 material used was derived from the series of Dr. Le(Jonte, w'hose 

 cabinet was then in ni}' care during his absence in Europe, supple- 

 mented by those in my cabinet. The object of the papers above 

 referred to was to bring together in a descriptive catalogue tlie spe- 

 cies then known, with synoptic tables to aid in their determination. 

 The old species were, for the most part, passed with mere mention, 

 the new ones were given brief, but sufficient descriptions. In the 

 meantime no opportunity has been allowed to pass that would add to 

 the value of the series. Since that jmblicatiou waij made a number 

 of the more striking forms were j^laced in Dr. LeConte's hands and 

 have been described in the "Bulletin of Hayden's Survey" 1878; 

 all of these were Aphodius. Shortly after several ^]gialia and 

 Rhyssemus w'ere described elsewhere, as will be seen in the bibliog- 

 raphy. A large number, relatively, remain to be described, and as 

 the series before me is as full as can be expected the present op- 

 portunity has lieen taken to give as complete a work as possible. The 

 genera will be considered in the order in which they are usually 

 placed, and should any discussion of the relations of the genera 

 among themselves be deemed necessary, it will be given at tiie end. 



TRANS. AMER. ENT. SOC. (1) JWMVRY. 1 S-<7. 



