MR. WALKEU ON DIPTERA COLLECTED AT MAKESSAB. 161 



discal transverse vein straight, upright, ])arted by hardly half its length 

 from the pr£ebrachial transverse. Length of the body 2i lines j of the 

 wings 5 lines. 



Subfam. Diopsides, Walk. 

 Gen. Diopsis, Linn. 



203. Diopsis subnotata, Westw. Orient. Ent. pi. 18. f. 2. 

 Inhabits also the Philippine Islands. 



204. Diopsis detrahens, n. s. Fam. Nigra, capite ex parte ferru- 

 gineo, oculorum petiolis breviusculis, abdomine subtus lurido, coxis 

 femoribiisque fulvis, his apice nigris, alis nigricantibus macula sub- 

 costal! alba. 



Female. Black ; head partly ferruginous ; petioles of the eyes each 

 equal in length to the space between them ; abdomen lurid beneath ; 

 coxae and femora tawny, the latter with black tips ; wings blackish, 

 with a white subcostal spot towards the tip ; veins black ; halteres 

 piceous. Length of the bo<iy 2\ lines ; of the wings 4 lines. 



Subfam. Sepsides, Walk. 

 Gen. Calobata, Fahi\ 



205. Calobata resoluta, n. s. Mas. Nigra, abdomine lineari longo, 

 segmentis albido marginatis, pedibus longissimis, femoribus posteri- 

 oribus testaceo trifasciatis, femoribus anticis basi coxisque anticis tes- 

 taceis, tarsis anticis albis, alis cinereis apices versus obscurioribus fascia 

 subapicali albida. 



Male. Black, slightly shining ; pectus with an obhque cinereous band 

 on each side ; abdomen linear, pale beneath, much narrower than the 

 thorax, and nearly twice its length, hind borders of the segments 

 whitish ; legs black, very long ; posterior femora with three testaceous 

 bands ; fore femora at the base, and fore coxse, testaceous ; fore tarsi 

 white ; wings dark grey, blackish grey on each side of a whitish sub- 

 apical band ; veins black : discal transverse vein straight, upright, 

 parted by about half its length from the border, and by more than 

 four times its length from the prsebrachial transverse ; halteres piceous. 

 Length of the body 6 lines; of the wings 10 lines. 



206. Calobata impingens, n. s. Mas et Fam. Obscure cyanea, 

 antennis rufis, abdomine subtus ferrugineo segmentis albo marginatis, 

 pedibus fulvis, femoribus tibiisque anticis nigris, illis basi fulvis, femori- 

 bus posterioribus nigro trifasciatis, tibiis .tarsisque posterioribus ob- 

 scure fulvis, tarsis anticis albis basi nigris, alis cinereis fusco bifas- 

 ciatis. 



Male and Female. Dark blue ; head white about the eyes ; antennae 

 red ; abdomen lanceolate, ferruginous beneath, narrower and very 

 LINN. PROC.^ZOOLOGY. 11 



