LIST OF DIPTERA. 159 



at the base and along the fore border ; veins tawny ; poisers pale 

 tawny. Length of the body 7 lines ; of the wings 14 lines. 



Var. /3. Tips of the feelers black. 



Var. y. Nearly the whole of the back of the abdomen piceous. 



a. Port Essington. Presented by the Earl of Derby. 



Tabanus lasiophthalmus ? Macq. Dipt. Exot. i. 143. 

 a. Columbia. Presented by M. Goudot. 



Tabanus hebes, n. s., fern. Cinereus, thorace cano quadrivittato , 

 abdomine ferrugineo, fulvo cincto maculisque cinereis univittato, 

 an tennis pedibusque fulvis, alis subcinereis. 



Head brown above, covered with a hoary down, pale tawny, and 

 slightly clothed with white hairs beneath : mouth black ; palpi 

 tawny : feelers tawny, more or less black towards the tips : chest 

 | gray, with four hoary stripes ; sides and breast tawny, the latter 

 , clothed with hoary down : abdomen ferruginous ; each segment 

 ! with a broad tawny band along the hind border, which is whitish ; 

 there is also a whitish stripe on the back ; the first segment has a 

 I large gray spot which surrounds the hind border of the scutcheon ; 

 the following segments have forked gray spots, which successively 

 t decrease in size until the fifth segment when the spot is nearly obso- 

 lete, but on the sixth it is larger and nearly semicircular, and on the 

 1 seventh it occupies nearly the whole back ; under-side ferruginous ; 

 hind borders of the segments pale tawny : legs tawny ; hips hoary ; 

 fore thighs and hind thighs, and sometimes middle thighs, gray with 

 tawny tips ; fore feet and tips of fore shanks piceous: wings slightly 

 , gray ; wing-ribs and rib-veins ferruginous ; veins black ; poisers 

 I tawny. Length of the body 6 — 7 lines; of the wings 12 — 14 lines. 



! a. Africa (Cape ?) From Mr. Children's collection. 



! Tabanus attenuatus, n. s., mas. Fulvus, capite pectoreque albis, ab- 

 domine ferrugineo flavo vittato, pedibus fulvis , tarsis piceis, alis 

 subcinereis, marginibus anticis fulvis. 



Nearly allied to T. elongatus P Head white, clothed beneath 

 i with white hairs : eyes tawny with a coppery tint, bronze beneath 

 i where the facets are smaller: palpi yellow: feelers bright tawny, 

 , with brown tips : chest bright pale tawny, clothed with hairs of the 

 I same colour : breast almost white, covered with long white hairs : 

 . abdomen pale ferruginous, clothed with pale yellow hairs, and hav- 

 I ing a broad pale yellow linear stripe along its whole length : legs 

 tawny ; feet and tips of the shanks piceous : wings slightly gray, 

 tawny along the fore border for two-thirds of the length ; veins 



p 2 



