MR. WALKER ON DIPTERA COLLECTED AT MAKE8SAR. 161 
discal transverse vein straight, upright, parted by hardly half its length 
from the praebrachial transverse. Length of the body 21 lines ; of the 
wings 5 lines. 
Subfam. DropsiDEs, Walk. 
Gen. Diopsis, Linn 
203. Diopsis subnotata, IVestw. Orient. Ent. pi. 18. f. 2. 
Inhabits also the Philippine Islands. 
204. Diopsis detrahens, u. s. Fcem. Nigra, capite ex parte ferru- 
gineo, oeulorum petiolis breviusculis, abdomine snbtus lurido, coxis 
femoribusque 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 body 2|- lines ; of the wings 4 lines. 
Subfam. Sepsides, Walk. 
Gen. Calobata, j Fair. 
205. Calobata resoluta, n. s. Mas. Nigra, abdomine lineari longo, 
segmentis albido inarginatis, pedibus longissimis, femorihus 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 oblique 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 coxae, 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 praebrachial transverse ; halteres piceous. 
Length of the body 6 lines; of the w r ings 10 lines. 
206. Calobata impingens, n. s. Mas et Fcem. Obscure cyanea, 
antennis rufis, abdomine subtus ferrugineo segmentis albo marginatis, 
pedibus fulvis, femoribus tibiisque anticis nigris, illis basi fulvis, feraori- 
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 
