ART. 16 NEW ICHNEUMON-FLIES MUESEBECK 11 



has seemed advisable to include this note, which is based on a study 

 of the types of both Neoneurus halidaii Marshall and Ecclitis 

 clypeatv/S Foerster. 



Subfamily OPIINAE 



Genus RHINOPLUS Foerster 



Rhlnoplus Foerster. Verli. Naturh. Ver. Preuss. Rheiul., vol. 19, p. 258, 1862. 

 (Genotype, Rhlnoplus laevigatus Foerster.) 



Since the description of this opiine genus, with R. laevigatus as 

 the only included species, two African species have been referred to 

 it, namely, R. fuscipen^iis Szepligeti and R. fulvus Brues. Neither 

 of these, however, properly belongs in Rhinoflus^ both Szepligeti 

 and Brues having misinterpreted Foerster's characterization of the 

 genus on the basis of " Clypeus mit starkem Horn." Foerster's geno- 

 type, which I have seen, has the clypeus large and provided with a 

 striking hornlike tubercle situated in the middle and projecting for- 

 ward at right angles to the surface. The structure is very con- 

 spicuous, and while there may be some question as to its value as a 

 generic character it nevertheless sets off R. laevigata from all other 

 known Opiinae and, for the present at least, is to be considered of 

 generic importance. Both fuscipennis Szepligeti and fulvus Brues 

 merely have the anterior margin of the clypeus somewhat angled or 

 toothed at the middle, there being no indication of the horn that is 

 characteristic of Rhino plus. They are accordingly to be excluded 

 from that genus, and, in my opinion, are referable to Opius Wesmael. 



OPIUS FUSCIPENNIS (Szepligeti) (new combination) 



Rhinoplus fuscipennis Szepligeti, Mitt. Zool. Mus. Berlin, vol. 7, p. 226, 1914. 



OPIUS FULVUS (Brues) (new combination) 



Rhinoplus fuJvus Brues, Proc. Amer. Acad. Arts and Sci., vol. 61, p. 259, 1926. 



OPIUS GAHANI, new name 



Opitis fuscipennis Gahan, Proe. U. S. Nat. Mus., vol. 49, p. 79, 1915 [not fusci- 

 pennis (Szepligeti)]. 



The transfer of Rhinoplus fuscipennis Szepligeti to Opius unfor- 

 tunately makes necessary the renaming of Oplits fuscipennis Gahan. 



Genus OPIUS Wesmael 



Opius Wesmael, Nouv. Mem. Acad. Sci. Bruxelles, vol. 9, p. 115, 1835. (Geno- 

 type, Bracon carbonarius Nees.) 



Psyttalia Walker, Ann. Mag. Nat. Hist., ser. 3, vol. 5, p. 311, 1860. [Genotype, 

 Psyttalia festacea Walker (new synonymy).] 



This synonymy is published here, following an examination of the 

 genotype of Psyttalia., in order to make clear the identity of that 

 genus, regarding the position of which there has been some question. 

 The following notes, based on tlie type of P. testacea., are included to 



