ERIOPTERA. 149 



In the same year Mr. Rondani (Prodr. Dipterologiae. Italicae, 

 Yol. I) proposed a series of new generic names for certain groups 

 of the genus Erioptera. They have already been enumerated 

 above (p. 12), but among that number Ilisia alone, with Eriop- 

 tera maculata M. for type, has been described (Mus. Canestr. 

 Ill, p. 91, 18G5). The description of the others is to be ex- 

 pected in the volume of Mr. Rondani's work which will treat of 

 the Tipulidse, and which, as far as I am aware, has not yet 

 appeared. This circumstance, as well as my limited knowledge 

 of the European Eriopterae, prevent me from entering in a 

 detailed examination of this distribution. 



In 1863 Mr. Lioy (Atti Inst. Venet., 3d series, Vol. IX, p. 224) 

 proposed the genus Platytoma (with E. cinerascens M. for type) 

 for the Eriopterae with a discal cell and with an incrassated 

 second antennal joint. 



Dr. Schiner {Wiener Entomol. Monatschr. Yol. VII, 1863, 

 and Fauna Austriaca, Diptera, Vol. II, 1864) divided the genus 

 Erioptera (in the broadest sense) in four genera, which may be 

 tabulated thus : — 



I. Wings pubescent on the whole surface. 



1. A discal cell Rhypholophus. 



2. No discal cell, and anterior branch of the 



fourth vein forked .... Dasyptera. 

 II. Wings pubescent along the veins only. 



1. The fork of the fourth longitudinal vein, and 



with it, the great cross-vein, are in their 

 usual position ; the posterior branch of 

 the fourth longitudinal vein is forked . Trichosticha. 



2. The fork of the fourth longitudinal vein and 



with it, the great cross-vein, are much 

 nearer to the root of the wing than the 

 small cross-vein ..... Erioptera. 



Under the head of the genus Bhypholophus (comp. p. 139) I 

 have shown why Dr. Schiner's subdivision of the species of Sect. 

 I (" wings pubescent on the whole surface") cannot be retained 

 for the present. In the same way, the subdivision of Section II 

 ("wings pubescent along the veins only") is inapplicable to the 

 North American species. The definition of Trichosticha, as 

 given by the author, excludes two North American species (E. 

 caloptera and parva), and perhaps some European ones (E. tsenio- 



