DIPTERA. 393 
anterior feet snowy white: wings slightly tawny; veins pitchy: halteres 
tawny, with black knobs. Length of the body 5 lines; of the wings 
8 lines. 
South America. 
CALOBATA NIGRIFILUM. 
Atra, nitens, gracillima; caput latitudine longius ; thorax Susiformis ; 
abdomen lineare ; pedes nigro-picei, gracillimi; ale nigricantes. 
Deep black, shining, very slender: head longer than broad: feelers 
black, tinged with gray ; third joint conical, longer than the first and the 
second ; sixth bare: chest spindle-shaped: abdomen linear, much narrower 
than the chest, and about twice its length: legs pitchy black, very long and 
slender: wings blackish, very iridescent ; veins and halteres black. Length 
of the body 44 lines ; of the wings 8 lines. 
South America. 
CALOBATA TENUIPES. 
Ferruginea ; caput longum ; antenne picee, basi ferruginee ; thorax Sfusi- 
Jormis, piceo vittatus ; abdomen piceum, basi ferrugineum ; pedes 
picet, longissimi, gracillimi, femoribus basi tibiisque anticis fulvis, 
Semoribus posterioribus fulvo bifasciatis ; ale subcineree, albo quad- 
rivittale. 
Ferruginous, slender: head long; feelers pitchy; first and second 
joints ferruginous; third elliptical, longer than the first and the second ; 
sixth pubescent : eyes black: chest spindle-shaped, with a pitchy stripe: 
abdomen pitchy, almost linear, somewhat ferruginous towards the base, 
narrower than the chest and nearly twice its length: legs very long and 
slender, pitchy ; thighs at the base and fore-shanks tawny ; posterior thighs 
with two tawny bands: wings pale gray, with two whitish sometimes in- 
distinct bands in a cross line before the middle, and with two slender white 
bands near the tip, the second band short; veins black, tawny at the base: 
halteres tawny. Length of the body 4 lines; of the wings 7 lines. 
Van Dieman’s Land. 
