COLLECTED IN BORNEO. Ill 



tennis ferriigineis, alariun niargine postico cinereo. Fcem. Antennis nigris, 

 basi fernigineis, abdomine maculis dorsalibus subtrigonia 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 ; tibiee with ferruginous stripes. 

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

 and with very small facets in front. Antennae ferrugiuous. 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 neaj-ly triangular spot on the liind border of each segment. 

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

 of the veings 12-14 lines. 



33. Tabanus OPTATrs, n. s., fosm. Feri'ugineus subtus canus, capite antico 

 albido callo lanceolato, antennis nigris basi fidvis, thoracis latcribus testa- 

 ceis, scuteUo cano, abdomine fidvo vitta postice dilatata nigra guttis dor- 

 sahbus albidis, pedibus nigris, tibiis anticis basi tibiisque posterioribus 

 fulvis, alls nigro-fuscis apice lato margineque postico subcinereis macida. 

 media sublimpida. 



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

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

 base; angle of the thu'd joint acute, shghtly elongated. Thorax with 

 three darker Unes ; sides testaceous. ScuteUum hoary. Abdomen tawny; 

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

 a black dorsal stripe which is dilated liindward ; a wliitish nearly triangular 

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

 base and liinder tibiae tawny. Wings blackish-brown ; apical tliird pai't 

 and hmd border shghtly cinereous ; a nearly limpid discal spot before the 

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

 the wings 12 lines. 



34. Tabantjs simplicissimus, 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, aUs sublimpidis costa 

 venisque testaceis. Foem. Femoribus apice fiilvis, tibiis £ilbidis, anticis 

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

 hu"idis venis nigris basi ferrugineis. 



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

 triangidar, piceous. Palpi testaceous. Antennae tawny ; 3rd johit not 

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

 blackish at the tip. Legs black. 



3Iale. Eyes m front aeneous, and with very minute facets. Tibiae testaceous ; 

 fore tibia? with black tips ; liinder tarsi testaceous at the base. Wings 

 nearly limpid, very shghtly cmereous ; 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, feiTuginous 

 towards the base. Length of the body 34-4^ Unes ; of the wings 7-8 lines. 



