ME. WALKEE ON DIPTEEA COLLECTED AT MAZESSAE. 115 



Male. Bright green ; head in front and pectus silvery white ; antennae 

 black, testaceous at the base ; arista about as long as the thorax ; ab- 

 domen with a broad black band on the base of each segment ; legs 

 yellowish, stout ; tarsi black ; femora paler than the tibia; ; hind 

 femora with black tips ; wings greyish ; veins black ; cubital vein 

 slightly curved ; fore branch of the prsebrachial vein much curved ; 

 discal transverse vein straight ; halteres testaceous. Length of the 

 body 2^ lines ; of the wings 5 lines. 



73. PsiLOPus ABRUPTUS, n. s. Mas. Viridis, capite cyaneo, facie pec- 

 toreque subargenteis, antennis pedibus halteribusque nigris, abdomine 

 cyanescente-viridi, alis c.inereis. 



Male. Bright green ; head blue ; its fore part and the pectus somewhat 

 silvery ; antenna; black ; arista hardly longer than the thorax ; abdo- 

 men bluish green ; legs black ; wings grey ; veins black ; fore branch 

 of the cubital vein forming a much rounded right angle, from whence 

 it is straight to its tip ; discal transverse vein straight, parted by half 

 its length from the border, and by less than its length from the fork 

 of the cubital ; halteres black. Length of the body 2 lines ; of the 

 wings 4 lines. 



Gen. DoLiCHOPUS, Latr. 



74. DoLiCHOPUs ciNEREUS, n. s. Mas. Cinereus, capite albo, an- 

 tennis fulvis, pectore albido, abdomine fasciis seneo-nigris, pedibus 

 testaceis, tarsis anterioribus apice nigricantibus, tibiis posticis apice 

 tarsisque posticis nigris, alis cinereis, halteribus testaceis. 



Male. Cinereous, not metallic j head white between the eyes ; antennae 

 tawny ; 3rd joint elliptical ; arista black, much longer than the an- 

 tennae ; pectus whitish ; abdomen with an aeneous black band on each 

 segment ; legs testaceous, stout ; anterior tarsi blackish towards the 

 tips ; hind tarsi and tips of hind tibiae black ; wings grey ; veins black ; 

 praebrachial vein forming a right angle at its flexure, much curved 

 from thence to the border ; discal transverse vein slightly bent out- 

 wards ; halteres testaceous. Length of the body 3 lines ; of the wings 

 5 lines. 



75. DoLiCHOPUS PR^DiCANS, u. s. Fcem. Cinereus, capite pectoreque 

 albis, antennis fulvis, thorace vitta apiceque viridibus, abdomine ma- 

 culis lateral ibus albis, pedibus testaceis, femoribus posticis uigro linea- 

 tis, alis cinereis basi nigricantibus, halteribus fulvis. 



Female. Cinereous ; head and pectus white ; antenna; tawny : arista 

 black, longer than the antennae ; thorax with a dorsal stripe and the 

 hind part green ; abdomen with white spots along each side ; legs 

 testaceous, stout; tibiic beset with black spines ; tarsi black towards 

 the tips ; hind femora with a black line ; wings cinereous, blackish 

 towards the base ; veins black ; praebrachial vein gently curved out- 

 wards at its flexure, straight from thence to the border j discal trans- 



8* 



