LIST OF DIPTERA. 179 



Tabanus imperfectus, n. s., fem. Cinereo-niger, capite piceo subtus 

 fulvo, thoracis lateribus pectoreque ferrugineis, abdomine piceo 

 fasciis ferrugineis , pedibus ferrugineis,femoribus piceis, alis sub- 

 cinereis. 



Head piceous between the eyes (?), tawny beneath : eyes piceous, 

 with a coppery tinge : palpi and lancets pale tawny : feelers tawny : 

 chest grayish black ; its sides and the breast ferruginous : abdomen 

 piceous ; hind borders of the segments ferruginous : legs ferruginous ; 

 thighs piceous with ferruginous tips : wings slightly gray ; veins pi- 

 ceous, ferruginous at the base and along the fore borders ; poisers 

 ferruginous. Length of the body 5 lines ; of the wings 10 lines. 



a. New Holland. 



Tabanus concolor, n. s., fem. Cinereo-niger, subtus canus, pedibus 

 nigris, tibiis piceis, alis fusco-cinereis . 



Body grayish black, somewhat hoary beneath when the head 

 and the breast are clothed with hoary hairs: eyes piceous with 

 a brassy tinge : palpi tawny : sucker and feelers black : legs black ; 

 shanks piceous : wings gray with a brown tinge on the disk ; veins 

 and brands dark piceous; poisers tawny with pale yellow knobs. 

 Length of the body 5i lines ; of the wings 11 lines. 



a. New Holland. Presented by J. Hunter, Esq. 



Tabanus postponens, n. s., fem. Fulvus, capite pectoreque flavis, 

 thorace fusco quinquevittato, abdominis seg mentis fusco fasciatis, 

 pedibus fulvis, tarsis fuscis, alis subcinereis. 



Head yellow, thickly clothed beneath with pale yellow hairs : 

 eyes dark piceous : mouth yellow ; sucker mostly black towards the 

 tip : feelers and the mouth about their base tawny, chest dull tawny, 

 with five brown stripes : breast pale yellow, thickly clothed with pale 

 yellow hairs: abdomen tawny, paler beneath, having on the fore 

 border of each segment a brown band, which is broadest on each 

 side : legs tawny ; feet brown : wings slightly gray ; veins brown ; 

 poisers pale tawny. Length of the body 5 lines ; of the wings 1 

 lines. 



a. New Holland. Presented by the Haslar Hospital. 



b. New Holland. Presented by the Earl of Derby. 



Tabanus vetustus, n. s., fem. Albus, abdomine flavo-albo fasciis 

 fulvis, femoribus piceis, alis limpidis. 



Body white and clothed with white hairs, especially on the un- 

 der-side of the head and of the fore chest : eyes black : palpi pale 



