OF WASHINGTON. 247 



Boreodromia Coquillett, new genus. 

 Type : Synam phot era bicolor Loew. 



Brachystoma Meigen, Syst. Besch., in, 12, 1822. 

 Type : Syrphus vesiculosus Fabricius. 



Meigen described two species, B. longicornis, new species, and Syrphus 

 vesiculosus Fabricius. Westwood* designated longicornis as the type, but 

 referred to the figure of vesiculosus as a typical figure. Rondanif selected 

 longicornis as the type of his new genus Trichopeza, and designated vesi- 

 cnlosus as the type of Brachystoma. 



Chamadipsia Mik, Verb. k. k. Ges. Wien 1881,326, 1882. 

 Type : Clinocera hastata Mik. 

 Mik mentioned only one species, Clinocera hastata Mik. 



Chelifera Macquart, Recueil Trav. Soc. Sci. Agr. Arts Lille, 

 150, 1823. (Mantipeza Rondani, 18^6; Polydromya Bigot, 



18570 



Type: Tachydromia prcecatorta Fallen. 



Macquart described one species as new, C. raptor, but on page 165 

 he states that it is identical with Hemerodromia monostignm Meigen 

 ( Tachydromia prcecatoria Fallen, according to Schiner,J and Loew). 



Chelipoda Macquart, Recueil Trav. Soc. Sci. Agr. Arts Lille, 

 148, 1823. (Lepidomya Bigot, 1857.) 

 Type : Empis melanocephala Fabricius. 



Macquart described two species, 7\ichydromia mantispa Panzer (an 

 erroneous identification, a$ the species is credited with a discal cell), and 

 C. minor, new species, but on page 165 he states that the latter is identi 

 cal with Hemerodromia mantispa Meigen (.---- Tachydromia mantispa 

 Panzer = Empis melanocephala Fabricius, according to Meigen. || and 

 Schinerf). 



Chersodromia Walker, List Dipt. Ins. Brit. Mus., iv, 1157, 

 1849. 



Type : Tachypeza arenaria Haliday. 



Walker, without describing this genus, referred to Tachypeza arenaria 

 Haliday and Tachydromia graminum Fallen. Rondani** designated as 

 the type Tachypeza brevipennis Zetterstedt (= Tachypeza arenaria Hali 

 day, according to Walker+f and S 



*Introd., n, Synop., 132, 1840. 



tDipt. Ital. Prod., i, 150, 1856. 



J Fauna Aus., Dipt., i, 83. 



Wiener Ent. Monat., vm, 238. 



|| Syst. Besch., in, 64. 



1 Faun. Aus.. Dipt., i, 86. 



**Dipt. Ital. Prod., i, 147, 1856. 



ft Ins. Brit., Dipt., i, 138. 



JJ Fauna Aus., Dipt., i, 96. 



