LIST OF DIPTERA. 191 



ceous, tawny towards the base and along the fore borders ; poisers 

 ferruginous. Length of the body 5§ lines ; of the wings 12 lines. 



a. Venezuela. From Mr. Dyson's collection. 



Dichelaceea ferrugata. Chrysops ferrugatus, Fair. Syst. And. iii. 



2. Wied. Dipt. Exot. i. 94. 56. Tabanus ferrugatus, Wied. 



Auss. Zweif.i. 186, 113. 

 a. Carolina ? 



Dichelaceea abiens, n. s., mas. Fulva, thorace fasciis quatuor 

 pallidioribus abdominis segmentis flavo-fasciatis, pedibus fulvis, 

 alis subcinereis margine antico maculisque duabus fuscis. 



Head tawny : eyes piceous : mouth and feelers tawny ; a short 

 sharp horn near the base of the third joint of the latter : chest taw- 

 ny, with four paler tawny stripes, the outer pair confined to the 

 hinder part of the back : breast and abdomen tawny ; hind borders 

 of the abdominal segments pale yellow : legs tawny : wings light 

 gray, almost colourless on the disk, where are two large brown spots, 

 and the fore border is also brown, and has a long narrow colourless 

 stripe beneath it ; veins tawny ; poisers tawny, with brown knobs. 

 Length of the body 4 J lines ; of the wings 10 lines. 



a. West Indies. From the Rev. Lansdown Guilding's collection. 



Dichelacera bifacies, n. s. Fusca, capite fulvo, thorace pilis au- 

 reis bivittato, pectore cano, abdomine basi fasciisque fulvis, pedi- 

 bus fulvis, alis limpidis fusco fasciatis et vittatis. 



Head tawny, with two piceous tubercles above : eyes green and 

 purple : palpi tawny ; lancets ferruginous ; sucker piceous : feelers 

 tawny, hairy, rather longer than the head ; second joint not half the 

 length of the first ; third joint nearly twice the length of the first 

 and of the second, slightly curved, piceous except at the base, where 

 it emits a short horn, which is longer than the second joint : chest 

 brown, adorned with two bands of thick golden hairs : breast hoary : 

 abdomen brown ; first and second segments tawny, with the excep- 

 tion of a subquadrate spot on the disk of each ; there are broad 

 tawny bands along the hind borders of the third and of the fourth 

 segments, which are also fringed with golden hairs ; the following 

 segments have slight traces of similar bauds ; under-side of the ab- 

 domen tawny, with the exception of the piceous sides of the three 

 last segments : legs dull tawny ; feet darker : wings colourless, brown 

 along the fore border; a brown stripe proceeds from the base of the 

 wing and joins the hind border before the middle, and it is there 

 nearly joined by a band that runs obliquely back from near the tip 

 of the fore border, and emits a short brown branch that joins the 

 hind border near its tip ; veins piceous, tawny in some parts where 



