DIPTERA. 39 



size, and larger than those elsewhere : sucker l)lack ; palpi pale yellow, 

 clothed with short black hairs : feelers ferruginous, clothed with short 

 black hairs ; first joint tawny ; third armed with a very short acute tooth, 

 lohose tip is black ; comj)ound joint black towards the tip : chest pitchy, 

 thinly clothed with tawny hairs, ferruginous on each side, where it is also 

 clothed with Idack hairs : abdomen obconical, dark reddish brown, a little 

 longer and narrower than the chest, clothed on each side with tawny hairs, 

 adorned with three tawny stripes which are also clothed with tawny hairs ; 

 the middle stripe is partly brown, and more distinct than the side pair ; 

 under side tawny, with a hoary tinge, black towards the tip, and having a 

 l)road black middle stripe along the first and second segments: legs tawny, 

 clothed with short black hairs; thighs black towards the base, clothed with 

 white hairs ; feet and fore-shanks ferruginous, with black tips ; fore-feet 

 and hind-thighs black, tips of the latter tawny ; foot-cushions tawny : 

 wings gray, dark tawny at the base and along three-fourths of the length 

 of the fore border ; wing-ribs and veins ferruginous, the latter black to- 

 wards the tips ; amjlc of the tip cross-vein obtuse, not very distinct, bearing 

 a knob, or indication of a stump ; scales ferruginous ; poisers tawny, with 

 yellow knobs. Length of the body 6 lines ; of the wings 12 lines. 



South America. 



Tabanus dorsivixta, Fem. 



Cinereo-ferruc/ineus, thoracis vittis tribus lateribus pectoreque canis, ab- 

 dotnine flax^o-fusco, vitta dorsali et segmentorum marginibiis posticis 

 subtus pallidioribus, antennis basi pedibusque fulvis, femoribiis ciiie- 

 reis, tarsis piceis, tarsis anticis nigris, alis subcinereis basi et ad costam 

 subfulvis. 



Body dull ferruginous : covering of the head dark brown above, pale 

 tawny beneath where it is clothed with pale yellow hairs ; crown adorned 

 with a pitchy, shining, club-shaped ridge which is tawny in front: eyes 

 brassy, parted above by a moderately broad interval ; facets very small, but 

 slightly increasing in size towards the inner fore border : sucker black ; 

 palpi pale tawny, clothed with very short black hairs ; first and second 

 joints of the feelers tawny, clothed with short black hairs, tip of the first 

 above, of the second above and beneath lengthened, lingular : chest tinged 

 with gray, adorned with three hoary stripes ; sides and breast hoary, the 

 latter partly clothed with whitish hairs ; abdomen yellowish brown, obco- 



