DIPTERA. 333 
Musca concoLon. 
Cinerea ; caput flavo-album ; thorax nigro quadrivittatus ; abdomen nigro 
tessellutum ; antenne picee, basi ferruginee ; pedes nigri: ala sub- 
limpide, basi subfulve, ad costam subfusce. 
Cinereous : head yellowish white in front and beneath, white behind, 
clothed beneath with white hairs; frontalia black or hoary according to 
the direction in which they are viewed, broad, linear, inclosing a short ci- 
nereous stripe; epistoma prominent: mouth black, shining ; palpi tawny : 
feelers pitchy ; first and second joints dark ferruginous ; third rather deep, 
almost truncated at the tip, more than twice the length of the second, not 
reaching the epistoma ; fifth distinct; sixth stout towards the base, fea- 
thered with long hairs, not much longer than the third: chest with four 
interrupted black stripes: abdomen tessellated with black, obconical, not 
longer than the chest: legs black; thighs and shanks with a cinereous 
covering ; knees tawny: wings aimost colourless, with a tawny tinge at the 
base, pale brown along part of the fore border ; veins black, tawny towards 
the base; prebrachial vein slightly curved ; lower cross-vein with three 
very slight curves, the middle one inward, much longer than the other 
two which ave outward: alule white: halteres pale luteous. Length of 
the body 2% lines; of the wings 54 lines. 
South America. 
Musca pivisa. 
Aureo-viridis ; caput flavum; abdomen fulvum, nigro vittatum ; antenne 
lutea; pedes nigri, tibiis ferrugineis ; ale subcineree. 
Fem. Head pale yellow, with a silky white covering, clothed beneath 
and behind with white hairs; frontalia yellow, linear; facialia without 
bristles; epistoma prominent: eyes bare : proboscis black ; palpi luteous : 
feelers luteous ; third joint almost spindle-shaped, not nearly reaching the 
epistoma, full twice the length of the second ; sixth feathered with short 
hairs, black and merely pubescent towards the tip, full twice the length of 
the third; chest golden green, with a white covering : abdomen tawny, with 
an irregular interrupted black stripe : legs black; shanks ferruginous : 
2x 
