LIST OF DIPTERA. 43 



62. Stratiomys subalba. 



Mas. Nigra, subtus argenteo-pubescens ; antenna capite fere duplo 

 longiores, articulus \us basi fulvus ; scutellum margine pos- 

 tico fulvo, spinis duabus testaceis ; abdomen fasciis duabus 

 interruptis albidis, subtus viride argenteo-tomentosum ; pedes 

 fulvi, femoribus nigris ; alee limpidce, angustce, antice fuscce ; 

 halter es albi. 



Male. Black, clothed beneath with silvery down. Antennae 

 nearly twice the length of the head ; first joint tawny towards the 

 base, nearly six times the length of the second ; flagellum elongate- 

 fusiform. Scutellum tawny along the hind border, with two testa- 

 ceous spines. Abdomen with two interrupted whitish bands, one on 

 the second, the other on the third segment; under side pale green, 

 with silvery tomentum. Legs tawny ; femora black. Wings lim- 

 pid, narrow, dark brown in front. Hal teres white. Length of the 

 body 3 lines ; of the wings 6 lines. 



a. Para. From Mr. Bates' collection. 



63. Stka.tt.omys festiva. 



Foem. Nigra ; caput fulvum, supra nigrum ; antennce capite plus 

 duplo longiores ; thorax fulvo novemmaculatus, spinis piceis ; 

 abdomen maculis sex later alibus fasciisque tribus ventralibus 

 viridibus ; alee fuscce, basi apud costam pallidiores, venis ni- 

 gris basi fulvis ; halteres albi apice virides. 



Fern. Black. Head tawny; vertex and front mostly black. 

 Antennae much more than twice the length of the head ; first joint 

 nearly four times the length of the second: flagellum unusually 

 long. Thorax with three tawny spots on each side, and two on the 

 disk; a quadrate tawny spot on the scutellum; spines piceous. Ab- 

 domen with three bright apple-green spots on each side, and with 

 three short green bands beneath. Wings dark brown, paler in front 

 towards the base ; veins black, tawny at the base. Halteres white, 

 with green tips. Length of the body 5 lines ; of the wings 10 lines. 



a. Para. From Mr. Bates' collection. 



