334 INSECTA SAUNDERSIANA. 



wings slightly gray ; veins black, yellow at the base ; prsebrachial vein 

 forming a very obtuse angle at its flexure, very slightly bent inward be- 

 yond the middle : lower cross-vein slightly bent outward, straight near the 

 base : alulse white : halteres pale yellow. Length of the body 2^ lines ; 

 of the wings 5 lines. 



East Indies. 



MUSCA INCERTA. ' ' 



.r-'^/'K 



Alra ; thorax alho quadrivittatus, postice cyaneus ; abdomen cyaneuvi ; 

 alcB subcinerece, basi et ad coslam obscuriores. 



Deep black : head covered with white pubescence ; frontalia deep black, 

 linear ; epistoma prominent : mouth pitchy ; palpi black : feelers black ; 

 third joint covered with hoary pubescence, slightly decreasing in depth 

 from the base to the tip, reaching the epistoma, more than four times the 

 length of the second ; sixth joint feathered for half its length from the 

 base: chest tvith four white stripes ; hind part blue : abdomen blue, partly 

 green or purple : legs black: wings pale gray, a little darker at the base 

 and alonj part of the fore border ; veins black ; praebrachial vein forming 

 a hardly acute angle at its flexure, much curved inward and almost angular 

 near this, nearly straight from thence to the tip ; lower cross-vein with two 

 curves, the upper one outward, much deeper than the lower one which is 

 inward: alulae dark gray, with white borders: halteres pitchy. Length of 

 the body 4J lines ; of the wings 9 lines. 



Columbia. 



MuSCA AUCTA. 



C^XJ^i 



Cinereo-nigra ; caput canum ; thorax nigra quinquevittatus ; abdomen 

 viridi-cyaneum ; antenncB picea, basi ferruginece ; aUe subcinerece. 



Fem. Black, with a gray covering : head jvith a hoary covering ; fron- 

 talia broad, black, slightly widening towards the feelers ; facialia ferrugi- 

 nous, beset with very short bristles along half the length from the base ; 

 epistoma tawny, slightly prominent : palpi tawny : feelers pitchy ; first 

 and second joints ferruginous ; third linear, rather deep, rounded at the tip, 

 reaching the epistoma, more than four limes the length of the second ; 

 sixth black, feathered along full two-thirds of the length, much longer 



