COLLECTED IN BOBNEO. 117 



marginatis, pcdibus fulvis, tibiis posticis femoribusque piceo-vittatis, tarsis 

 posticis nigris, alis luridis trionte apicali fusca. 

 Female. Piceous. Head and pectus with gilded tomentiun. Mystax witli 

 several gilded bristles. Antennae tawny ; arista as long as the preceding 

 joints together. Thorax with two oblique streaks on each side, and with 

 two stripes of gilded tomentum. Abdomen moderately long, hardly sty- 

 late ; hind borders of the segments testaceous. Legs tawny ; femora and 

 hind tibiae mostly piceous above ; hind tarsi black. Wings lurid ; apical 

 third part brown, which colom' extends further along the hind border ; 

 veins black, tawny at the base ; cubital vein forked at a little beyond half 

 its length ; hind fork very undulating ; 3rd extcmo-mcdial vein joining 

 the 4th at some distance from the border. Halteres tawny. Length of 

 the body SJ hues ; of the wings 12 lines. 



66. AsiLrs CONTORTTIS, n. 8., focm. Niger, cinereo-tomentosus, facie albidd, 

 mystace suprtl nigro subtiis albido, antennis nigris, thorace vittis duabus 

 nigricantibus, pectore cano, abdomine subaureo piloso segmentis tcstaceo- 

 marginatis, pcdibus fc^rrugineis, fcmoribus tibiisque apico tarsisque nigris, 

 aUs luridis arcolarum apicaUum fuscarum discis paUidioribus. 



Female. Black, with cinereous tomentum. Face prominent, wliitish. My- 

 stax with some black bristles above, and with many wlutish bristles be- 

 neath. Antenna; black ; arista as long as the preceding joints together. 

 Thorax with two indistinct blackish stripes. Pectus hoary. Abdomen 

 wdtli shghtly gilded hairs, moderately long, hardly stylatc ; hind borders 

 of the segments testaceous ; tip black, shining. Legs fcrniginoixs ; tarsi 

 and tips of the femora and of the tibia; black. Wings liuid ; apical areo- 

 lets brown, with pale disks ; veins black ; cubital vein forked at beyond 

 half its length ; fore fork angular near its base ; hind fork very undulating ; 

 3rd externo-medial vein joinmg the 4th near the border. Halteres tawny. 

 Length of the body 6 lines ; of the wings 13 lines. 



Gen. Ommatius, Illiger. 



67. Ommatius Hecale, Walk. See p. 14. 



Gen. Leptogasteii, Meigen. 



68. Leptogaster tricolor, n. s., mas. Piceus, capite albido-tomentoso, 

 thoracis vittis duabus posticci attenuatis pectorisque latcribus testaceis, ab- 

 domine nigro fasciis quinque flavis, pcdibus flavis, tibiis posticis tarsisque 

 apice nigris, tarsis posticis ferrugineis apice nigris, alis cinereis costH 

 luridi, halteribus testaceis. 



Male. Piceous. Head with whitish tomentum. Antennae testaceous towards 

 the base. Thorax with two stripes, which are attenuated hindward, and 

 with the sides of the pectus testaceous. Abdomen black, with five yeUow 

 bands. Legs yellow ; coxa; and knees black ; liind femora striped with 

 black beneath ; hind tibia; with black tips ; hind tarsi fen-uginoug, witli 

 black tips. Wings grey, lurid along the costa; veins black. Halteres 

 testaceous. Length of the body 7 lines ; of the wings 11 lines. 



69. Leptooaster tntjtilis, n. s., mas. Niger nitens, ixsctore cano, pcdibus 

 testaceis, femoribus tibiis ct tarsorum articulis apice nigris, fcmoribus 



