274 ME. walker's catalogue oe dipteeous insects 



bus halteribusque albidis, femoribus anterioribus apice tarsis posticis 

 basi necnon femoribus tibiisque posticis nigris, alis cinereis. 



Allied to S. redhibens. 



Male. Cupreous purple. Mouth and antennae whitish ; 3rd joint of 

 the latter round. Thorax with a whitish slender callus along each 

 side. Abdomen elongate subfusiform. Legs whitish ; anterior femora 

 towards the tips, hind tarsi towards the base, hind femora and hind 

 tibiae black. Wings cinereous ; veins black ; halteres whitish. Length 

 of the body 3^ lines ; of the wings 7 lines. 



15. Sargus auADRiFASCiATus, Walk. See ante, p. 146. The de- 

 scription here referred to is incomplete ; the following characters are 

 more con-ect : — 



Mas et Fcem. Luteo-fulvus, ore antennis pedibusque testaceis, tibiis 

 posticis nigris, tarsis posticis albis basi nigris, alis subcinereis. Mas. 

 Abdomine fasciis duabus nigris. Fcem. Abdomine fasciis quatuor 

 nigris. 



Male and Female. Luteous tawny. Head black, shining. Eyes parted 

 by a very narrow interval in the female. Mouth and antennae testa- 

 ceous ; 3rd joint of the latter round. Legs testaceous ; hind tibiae 

 black ; hind tarsi white, black towards the base ; anterior tarsi with 

 black tips. Wings slightly cinereous ; veins black, testaceous at the 

 base. Male. Abdomen with two black bands towards the tip, and 

 with black appendages. Female. Abdomen with four black bands. 

 Length of the body 3^-4 lines ; of the wings 6-7 hues. 



16. Sargus TARSALis, n. s. Foem. Fulvus, capite nigro nitente, tho- 

 race subvittato, abdomine fasciis abbreviatis dilatatis nigricantibus, 

 tibiis posticis nigris, tarsis posticis albidis basi nigris, alis nigricantibus, 

 areolarum discis cinereis. 



Allied to S. repensans. 



Female. Tawny. Head black and shining above. Third joint of the 

 antennae round. Thorax indistinctly striped. Abdomen with an abbre- 

 viated dilated blackish band on each segment. Hind tibiae black ; hind 

 tarsi whitish, black towards the base. Wings blackish ; disks of the 

 areolets cinereous ; veins black, tawny at the base. Length of the 

 body 6 hnes; of the wings 10 lines. 



17. Sargus DEBiLis,n. s. Mas. Niger, nitens, antennis scutelli spinis 

 pedibus halteribusque albidis, abdomine sublineari, alis nigricanti- 

 cinereis. 



Allied to S. redhibens. 



Male. Black, shining. Antennae and legs and the fovu- minute spines 

 of the scutellum whitish. Abdomen nearly linear, much longer than 

 the thorax. Legs whitish. Wings blackish cinereous ; veins black; 

 halteres whitish. Length of the body 2^ lines ; of the wings 4 lines. 



18. Sargus iKFiciTUS, n. s. Mas. Pallide fulvus, nitens, antennis 



