COLLECTED IN BOENEO. Ill 



tennis ferrugineis, alarum margine postico cinereo. Foem. Antennis nigris, 

 basi ferrugineis, abdomine maculis dorsalibus subtrigonis testaceis, alarum 

 areolis cinereo vittatis. 

 Male and Female. Very nearly allied to T. univentris. Brown, cinereous 

 beneath. Abdomen ferruginous-red, black towards the tip ; hind borders 

 of the segments testaceous. Legs black; tibiae with ferruginous stripes. 

 Wings brown ; veins black. Halteres pale luteous. Male. Eyes aeneous, 

 and with very small facets in front. Antenna? ferruginous. Wings grey 

 along the hind border, and with indistinct grey streaks on the areolets 

 elsewhere. Female. Antennae black, ferruginous at the base. Abdomen 

 with a small nearly triangular spot on the hind border of each segment. 

 Areolets of the wings with cinereous disks. Length of the body 6-7 lines ; 

 of the wings 12-1.4 lines. 



33. Tabantts optatus, n. s., foem. Ferrugineus subtus canus, capite antico 

 albido callo lanceolate, antennis nigris basi fulvis, thoracis lateribus testa- 

 ceis, scutello cano, abdomine fulvo vitta postice dilatata nigra guttis dor- 

 salibus albidis, pedibus nigris, tibiis anticis basi tibiisque posterioribus 

 fulvis, alis nigro-fuscis apice lato margineque postico subcinereis macula 

 media sublimpida. 



Female. Ferruginous, hoary beneath. Head whitish in front. Callus lanceo- 

 late. Proboscis black. Palpi testaceous. Antennae black, tawny at the 

 base j angle of the third joint acute, slightly elongated. Thorax with 

 three darker lines ; sides testaceous. Scutelluin hoary. Abdomen tawny; 

 hind borders of the segments beneath and on each side above testaceous ; 

 a black dorsal stripe which is dilated hindward ; a whitish nearly triangular 

 dot on the hind border of each segment. Legs black ; fore tibiae at the 

 base and hinder tibiae tawny. Wings blackish-brown ; apical third part 

 and hind border slightly cinereous ; a nearly limpid discal spot before the 

 middle ; veins black. Halteres blackish. Length of the body 6 lines ; of 

 the wings 12 lines. 



34. Tabantjs simplicissimxjs, n. s., mas et foem. Cinereus, callo trigono 

 piceo, antennis fulvis, thoracis lateribus testaceis, abdomine testaceo apice 

 nigricante, pedibus nigris. Mas. Tarsis posterioribus basi tibiisque poste- 

 rioribus testaceis, tibiis anticis testaceis apice nigris, alis sublimpidis costa 

 venisque testaceis. Foem. Femoribus apice fulvis, tibiis albidis, anticis 

 apice nigris, tarsis posterioribus basi fulvis, alis cinereis apud costam 

 luridis venis nigris basi ferrugineis. 



Male and Female. Cinereous. Callus at the base of the antennae broad, 

 triangular, piceous. Palpi testaceous. Antennae tawny ; 3rd joint not 

 dilated nor dentate. Sides of the thorax testaceous. Abdomen testaceous, 

 blackish at the tip. Legs black. 



Male. Eyes in front aeneous, and with very minute facets. Tibiae testaceous ; 

 fore tibiae with black tips ; hinder tarsi testaceous at the base. Wings 

 nearly limpid, very slightly cinereous ; costa, veins and halteres testaceous. 



Female. Callus between the eyes long and slender. Femora with tawny tips; 

 tibiae whitish ; fore tibiae with black tips ; hinder tarsi tawny towards the 

 base. Wings cinereous, lurid along the costa ; veins black, ferruginous 

 towards the base. Length of the body 3^-4^ lines ; of the wings 7-8 lines. 



