72 PROC. ENT. SOC. WASH., VOL. 20, NO. 4, APR., 1918 

 (THREE HUNDRED AND TWELFTH MEETING, APRIL 4, 1918). 



THE CASE OF THE GENERA RHINA AND MAGDALIS. 



By W. DWIGHT PIERCE. 



The two genera concerned in this note present a very interest- 

 ing nomenclatorial case which the Writer has attempted to clarify. 

 A number of authors have written on the subject, but it is also 

 necessary to bring up the matter again because of an unfortunate 

 error made by the writer in his paper published in the Proceedings 

 of the United States National Museum, vol. 51, No. 2159, in which 

 an earlier error of Latreille's was followed. 



Rhina Latreille (1802) does not belong to the Curculionidae, 

 Magdalininae as there stated, but, as formerly treated, to Cos- 

 sonidae, Rhininae. The synonymy may be stated as follows: 



Family COSSONIDAE. 



Subfamily Rhininae. 



Orthognalhinae Pierce, 1916, p. 465. 



Genus Rhina Latreille, 1802. 



Rhina Latreille, 1802, His. Nat. Gen. et Part, des Crust, et Ins., vol. 3, 



pp. 198, 199. 



Rhinus Latreille, 1810, Pierce, 1916. 

 Rhinostomus Rafinesque, 1815. 



Type, barbicornis (Fabricius) Latreille (1802), designated by 

 Crotch (1870) and accepted by Pierce (1916). This is a syno- 

 nym of barbirostris Fabricius, 1775, Syst. Ent., p. 135. 



The original confusion in the genus arose as follows: In 1802 

 Latreille described Rhina with two described sections. The 

 first contained " 'barbicornis F.," the second "cerasi (?) F." There 

 is no Curculio barbicornis F., so the first species which is validly 

 described, must be known as Rhina barbicornis (F.) Latreille 

 (1802). It is a synonym of Curculio barbirostris Fabricius which 

 was probably what Latreille meant. Crotch (1870) and Pierce 

 (1916) fix barbicornis (F.) Latreille (1802) as type of Rhina. 

 Latreille (1810) fixes barbirostris Fabricius as type of Rhinus. 



In 1804 Latreille treated Rhina with two species barbirostris 

 Fabricius and barbicornis Latreille. The first is the same as 

 barbicornis Latreille (1802); the second is preoccupied and is a 

 synonym of trifoveolata Gyllenhal. 



From (barbicornis Latreille, 1802) = - barbirostris Fabricius, we 

 obtain our modern genus Rhina of the Cossonidae. 



From (barbicornis Latreille, 1804) = tr-ifovcalntn Gyllenhal, 



