LIST OF DIPTERA. 389 



base ; brands brown, narrow ; poisers tawny, their clubs mostly 

 brown. Length of the body 3 lines ; of the wings 8 lines. 



a. Port Essington . From Mr. Gould's collection. 



Tabanus tritus, Walk. Linn. Trans, xvii. 338, 19. 



a. Cape Gregory. Presented by the Entomological Club. 



Tabanus trinotatus, Wied. Auss. Zwief. i. 182, 106. 

 a. Brazil? 



Tabanus marginatus, n. s., fern. Cinereus, capite flavo-fusco, snb- 

 tus cano, abdomine fusco segmentis fulvo fasciatis, pedibus cine- 

 reo~nigris, tibiis fulvis aut piceis, alls cinereis. 



Head yellowish brown, dark brown and shining in front be- 

 tween the eyes, hoary and clothed with hoary hairs beneath : eyes 

 i dark red : palpi tawny ; sucker piceous : feelers ferruginous ; third 

 • joint tawny, piceous towards the tip, with an angle near the base : 

 ! chest dark gray, with a tawny tinge along each side : breast paler : 

 abdomen dark brown ; hind borders of the segments tawny and 

 clothed with tawny hairs : legs grayish black, clothed with short 

 | black hairs ; knees bright tawny ; shanks dull tawny, darker towards 

 . the tips ; wings gray ; veins piceous, tawny towards the base ; 

 j brands brown, narrow ; poisers tawny with brown knobs. Length 

 of the body 3 lines ; of the wings 6 lines. 



Var. /3. Shanks piceous, very dark tawny at the base. 



a. New Holland. Presented by the Haslar Hospital. 

 I b. Port Essington. From Mr. Gould's collection. 



| Tabanus erraticus, n. s., mas. Niger, capite subtus piceo, pectore 

 ferrugineo vario, abdominis segmentis ferrugineo fasciatis, pedi- 

 bus nigris, alis cinereis venis nonnullis fusco nebulosis. 



Body black: head piceous beneath, and clothed with black 

 hairs : palpi dark tawny ; sucker piceous : feelers piceous ; first and 

 second joints clothed with short black bristles ; third joint slightly 

 curved, with no angle or horn : breast varied with dark ferruginous 

 i colour : abdomen clothed on each side with black hairs ; hind bor- 

 ders of the segments ferruginous : legs black ; trochanters and knees 

 tawny : wings dark gray ; veins black, clouded with brown towards 

 the base, as are also the little cross veins ; poisers tawny ; knobs at 

 the base and tips of the stalks, more or less, piceous. Length of 

 the body 6 lines ; of the wings 13 lines. 



a. New Holland. Presented by the Haslar Hospital. 



