532 ENTOMOLOGICAL NEWS. [September, 



become acquainted with several of the long-legged species of 

 this genus, I do not think that there is any justification for 

 Dacty/oi/n'ia. 



The synonym)* in this case was made out independently by 

 Professor Wheeler, and has been referred to by him in his- 

 recent extensive paper on the Dolichopodidae (Proc. Cal. Acad. 

 Sci., 1899). 



3. Metapelastoneurus Aldrich, 1. c., 152. 



This genus w r as based on the peculiar development of the 

 hypopygium in a species of Pelastoneurns. Since the time of 

 establishing it, I have often doubted the advisability of using 

 such characters, unless of very remarkable form, and accom- 

 panied with some other tangible marks of distinction. Recently 

 I have been engaged in working up the Dolichopodidae for the 

 Biologia, and I find so many forms of hypopygium in the genus 

 PclaStoneurus as to leave no doubt of the untenability of my 

 genus. I discard the name the more willingly, from the fact 

 that it is the most villainously compounded (with three or four 

 exceptions ) that I ever inflicted on a long-suffering public. 



4. Xanthotricha Aldrich, Trans. Ent. Soc., London, 1896, 339. 



This is identical with Thrypticns Gerstaecker, Stett. Ent. 

 Zeit., 1866, 43. It has also been described by Wheeler under 

 the name of Aphantofiinns, which would have been prior to my 

 name. Wheeler has referred with a doubt to this synonymy 

 in his paper, p. 30. ~By the way, I may take occasion to re- 

 mark that my Th. minor differs from his willistoni in having 

 antennae which are yellow, except the tip of third joint. 



The flat or concave space before the scutellum cannot be a 

 character of importance in this genus, as it does not occur in 

 most of my specimens. As the species are minute and very 

 soft, shriveling or drying, it is usually impossible to speak with 

 certainty on this point. When I described the genus, there 

 seemed to be a difference from Aphantotiuins in this part of the 

 structure ; but I am now convinced that it is evanescent. 



5. Chrysotus apicalis Aldrich, loc. cit., 330. 



This species has had such a checkered history that I can 

 best express it by putting it in the form it might assume in a 

 catalogue as follows : 



