148 MR. WALKER O^N DIPTERA COLLECTED AT MAKESSAR. 



luteis basi nigris, abdominis segmentis flavo marginatis, tarsis albis 

 apice nigris, alis subcinereis dimidio basali hitescente fasciis contiguis 

 fuscis, fascia strigisque exterioribus fuscis, halteribus fulvis. 

 Male and Female. Black, shining. Head yellowish-white, with four 

 black bands ; 1st band on the vertex, broader than the others ; 2nd 

 across the base of the antennae ; 3rd in front of the face ; 4th on the 

 epistoma ; antennae pale luteous, black at the base ; hind borders of 

 the abdominal segments yellow ; sides dark tawny towards the base ; 

 legs pubescent ; tarsi white, with black tips ; wings slightly cinereous ; 

 basal half somewhat luteous, with several partly confluent brown 

 bands, exterior part with one brown band and with several transverse 

 brown streaks ; veins black, pale luteous exteriorly ; discal transverse, 

 vein slightly curved outward, parted by about one-third of its length 

 from the border, and by more than its length from the praebrachial 

 transverse ; alulae white ; halteres tawny. Length of the body 3 lines ; 

 of the wings 7 lines. 



Gen. Platystoma, Latr. 



174. Platystoma atomarium, n. s. Mas. Cinereum, nigro pul- 

 verosum, facie alba nigro biguttata, antennis pedibusque nigris, arista 

 plumosa, pectore albido, alis nigricantibus guttis plurimis limpidis. 



Male. Cinereous ; head flat above, white about the eyes ; face white, 

 with a black dot on each side in front ; antennae black, nearly extend- 

 ing to the peristoma ; 3rd joint linear, rounded at the tip, more than 

 twice the length of the 2nd ; arista plumose ; thorax with numerous 

 lines of minute black points ; pectus whitish, with black points ; ab- 

 domen oval, powdered with black, not longer than the thorax ; legs 

 short, stout, black ; wings blackish, covered with hmpid dots, except- 

 ing a narrow oblique band on the transverse veins ; veins black ; discal 

 transverse vein straight, upright, parted by less than half its length 

 from the border, and by a little more than half its length from the 

 praebrachial transverse. Length of the body 2i lines ; of the wings 

 4^ lines. 



175. Platystoma b a sale, n. s. Fcem. Cinerea, capite lineis tribus 

 albidis, antennis basi nigris, arista plumosa, thorace vittis indistinctis 

 fuscis maculisque lateralibus nigris testaceo-marginatis, scutello nigro 

 vitta cinerea, abdominis segmentis albido-marginatis, femoribus anticis 

 tibiisque albido fasciatis, alis subcinereis lituris transversis fascia ex- 

 teriore costam versus dilatata fasciaque subapicali nigricantibus, hal- 

 teribus albis. 



Female. Cinereous ; head white about the eyes and beneath, and with 

 three whitish lines on the front ; epistoma not prominent ; proboscis 

 large ; antennae black towards the base, not near reaching the epi- 

 stoma ; 3rd joint elongate-conical, about twice the length of the 2nd ; 

 arista plumose j thorax with indistinct brown stripes, and on each side 



