46 Prof. Charles P. Alexander on 



terminal lobe, rather stout, terminating in a short, acute spine that 

 is placed laterally. Penis-guard rather stout, the extreme tip 

 decurved into a short point. 



Hab. Brazil. 



Holotype, (^, Bahia {Fnthstorfer). 



Type in the collection of the Vienna Museum. 



Gnophomyia melancholica, sp. n. 



General coloration black ; legs and halteres black ; wings with a 

 pale brown tinge, cells C and Sc slightly darker; stigma small, 

 dark bro^vn ; distal cells of wing with comparatively sparse macro- 

 trichiac; male hypopygium with a single, very complex pleural 

 appendage that is divided into three arms. 



Male. — Length about 8 mm. ; wing 8-5 mm. 



Rostrum and palpi black. Antennal scape black, the flagellar 

 segments broken. Head black. - 



Thorax black. Halteres and legs black. Wings with a pale 

 brownish tinge, cells C and Sc slightly darker brown; stigma com- 

 paratively small, dark brown; veins dark brown; conspicuous 

 macrotrichiae in cells Scl, 1st and 2nd Bl, R2, J?3, E5, 1st M2, 

 2nd M2, ilf 3 and the outer end of cell Cul ; the macrotrichiae are 

 confined to the centres and distal ends of the cells ; no macrotrichiae 

 in cells Cu or 1st A. Venation : Sc2 close to the tip of Scl, the 

 latter only a trifle longer than Sc2; Its long, gently arcuated at 

 origin; R2 + 3 short, about one-half the basal deflection of Cul; 

 r on £2 + 3 before the fork ; basal deflection of i?4 + 5 angulated 

 near mid-length ; basal deflection of Cul a short distance beyond the 

 fork of M. 



Abdomen black. Male hypojjj'gium of the type of 0. luctuosa 

 O.S. Pleurites short and stout, with the single complex pleural 

 appendage situated on the dorsal- proximal face; apex of each 

 plcurite produced caudad and slightly proximad into a digitiform 

 lobe, the extreme apex suddenly narrowed into a chitinised tip 

 which bears about ten small setae on the proximal or cephalic face. 

 Pleural appendage very comjjlcx, divided into three principal arms ; 

 dorsal arm appearing as a long, slender, curved spine, directed 

 caudad and thence laterad, tapering gradually to the acute tip, the 

 proximal edge delicately fringed with short, pale hairs; inter- 

 mediate arm fleshy, more slender at base, the distal end dilated, 

 the apex feebly bifid, the proximal face with abundant, long, yello\A% 

 erect setae; ventral arm a slender chitinised rod that bears a con- 

 spicuous chitinised spine on the lateral face some distance back 



