DIPTEKA. 7 



feet black, broad : wangs dark tawny, having at two-thirds of the length a 

 broad black band which fades towards the hind border ; wing-ribs and 

 veins dark tawny ; tip cross-vein like that of C. nigrojlumma ; poisers 

 tawny. Length of the body 4 lines ; of the wings 7 lines. 



South America. 



NONACRIS, n. g. 



Antennaj septem-articulata3 ; aiticulus 2us lo multo longior ; 3us et 

 sequentes breves : alis vena transversa apicalis nulla ; areolis una discoi- 

 dalis, subniarginalis una, postica3 quatuor ; 4ta clausa 



Feelers seven-jointed ; second much longer than the first; third and 

 following joints short : no tip cross-vein in the wdng ; one discoidal areolet ; 

 one submarginal areolet ; four posterior areolets, the fourth closed before 

 the border. 



NONACRIS XRANSEQUA, MaS. 



Fulvtis, antennis nigris bast fulris, pedihus fitlvh, tarsis apice piceis, alis 

 fuivis. 



Body tawny : eyes pitchy, convex, meeting on the crown ; facets 

 small : eyelets forming a little triangle : feelers black, clothed with short 

 black hairs ; first and second joints tawny ; third and fourth dark tawny : 

 chest clothed with short yellow hairs: abdomen linear, flat, a little nar- 

 rower than the chest and full twice its length : legs tawny, rather long and 

 slender, especially the hind pair ; shanks darker than the thighs ; feet 

 pitchy towards the tips ; foot-cushions pale tawny : wings and wing-ribs 

 tawny; veins pitchy, tawny towards the base ; poisers tawny, rather long. 

 FiCngth of the body 4^ lines ; of the wings 9 lines. 



South America. 



Fam. TABANII. 



PANGONIA, Lalreille. 



The species of this genus are not very numerous, but it contains se- 

 veral groups or subgenera, for which the following names arc proposed. 



NuCP;RIA. - ACVi^C-iT-V^-^A/^ r)<M^V- 



Among the characters of this division the length of the sucker is most 

 apparent . the chest is slightly striped : the abdomen is mure or less 



