268 SYBPHID^. 



1. bicolor, Fb. e. s. iv. 297. 71 (1792) ; LI. j Mg. ; St. F. et Srv. ; 

 Mq. ; Ztt. ; Rdn. melanochrysa, Gm. Niger, epistomate Jiavo nigro- 

 fasciato, scutelli marginefulvo, alis subcinereis, abdomine rufo-fasciato, 

 pedibus fulvis basi nigris. Long. 2^ ; alar. 4^ lin. 



Black. Epistoma yellow, with a black band. Hind border of the 

 scutellum tawny. Wings slightly grey. Halteres yellow. Abdomen 

 with a broad red band. Legs tawny ; femora at the tips and tibiae at 

 the base yellow ; femora black towards the base. 



Bare. In the British Museum. (E.) 



2. arcuatus, Mg. zw. iii. 179. 3. pi. 27. f. 20, 21 (1822) ; St. F. 

 et Srv. ; Mq. Niger, epistomate flavo-albo, antennis apic& ferrugineis, 

 scutelli marginefulvo, alis limpidis, abdomine fascia testacea arcubusque 

 tribus interrupts albidis, pedibus flavis basi nigris apice fulvis, posticis 

 fusco-cinctis. Long. 2f ; alar. 4 lin. 



Black. Epistoma yellowish-white. Third and fourth joints of the 

 antenna ferruginous ; third piceous above. Hind border of the scu- 

 tellum tawny. Wings colourless. Halteres yellow. Abdomen Eeneous- 

 black, with one testaceous band and three arched interrupted whitish 

 bands. Legs yellow ; femora towards the base and coxae black ; tibia? 

 towards the tips and tarsi tawny ; hind tibiae with brown bands ; hind 

 metatarsi brown. 



Bare. In the British Museum. (E.) 



3. obscurus, Mgrle. ; Mg. zw. iii. 183. 12 (1822) ; Mq.; Ct. -' 



sigillatus, Ct. ! b. e. 593. Nigro-chalybeus, epistomatis lateribusflavis, 

 antennis nigris, alis limpidis, pedibus fulvis, femoribus lam nigris. Long. 

 g-U-g^ alar. 4-4 lin. 



Chalybeous-black. Epistoma chalybeous-blue, with a yellow stripe 

 of various breadth along each side. Antennae black. Wings colourless. 

 Halteres white. Legs tawny ; femora towards the base and coxce black ; 

 the black part occupies three-fourths of the hind femora and one- 

 third of the fore femora. Var. /3. A red spot on the disc of the 

 abdomen. 



Generally distributed. (E.) 



4. femoratus, Mgrle.; Mg. zw. iii. 184. 14 (1822). Nigro- 

 chalybeus, antennis nigris, alis limpidis, pedibus fulvis, femoribus basi 

 nigris, tibiis posticis nigro-cinctis. Long. 2^; alar. 4 lin. 



Male and Female. Chalybeous-black. Head dingy white behind. 

 Epistoma chalybeous-blue, with a pale tawny covering on each side. 

 Antennae black. Wings colourless. Legs tawny ; femora towards the 

 base and coxae black ; the black part occupies three-fourths of the hind 

 femora and one-third of the fore femora ; a black band round each hind 

 tibia. 



Generally distributed. (E. I.) 



