MR WALKER OK DIPTERA COLLECTED AT MAKESSAR. 147 
Gen. OciiTtiipniLA, Fallen , 
16M Ochthiphila. discoglauca, n, s. Fcem. Fusea, capite tho- 
racisque disco glucescente-albidis, arista plumosa, thorace lineis duabus 
lateral ibus albidis, abdomine liueis transversis vittaque albidis, tibiis 
tarsisque rufescentibus, alis cinereis, halteribus testaceis. 
Female. Brown ; bead glaucous-whitish ; antennae black, nearly reach- 
ing the epistoma ; third joint conical, arista plumose ; thorax with a 
very broad glaucous-whitish stripe, a whitish line on each side and 
two on each side of the pectus ; abdomen oval, a little shorter than 
the thorax,- with a whitish band on the hind border of each segment 
and with a whitish stripe, the whitish hue appearing tawny in some 
aspects ; tibiae and tarsi reddish ; wings grey ; veins black ; discal 
transverse vein straight, upright, parted by much less than its length 
from the border, and by nearly twice its length from the prmbrachial 
transverse ; halteres testaceous. Length of the body 2 lines ; of the 
wings 4 lines. 
Gen. Celyphus, Balman. 
1/0. Celyphus obtectus, Balman . See Vol. I. p. 30. 
171. Celyphus scutatus, IVied. See Vol. I. p. 131. 
Subfam. Ortalides, Holiday. 
Gen. Lamprogaster, Macq. 
1/2. Lamprogaster marginifera. Walk. See Vol. II. p. 111. 
Gen. Pterogekia Bigot, MSS. 
Mas et Foem. Platystomati affinis. Corpus breve, latum, erassum. 
Caput thorace latius, antice planum, genis dilatatis. Antenna; parvac ; 
articulus 3 U * longi-conicus ; arista plumosa. Thorax subconvexus ; 
scutellum magnum. Abdomen thorace brevius et angustius. Pedes 
breves, validi ; tibiae arcuatae. Ala; sat parvse ; alula; maxima;. Mas. 
Gena; angulatre, valde dilatat®. 
This genus is allied to Platystoma , and more especially to Trigonosoma. 
Male and Female. Body short, broad, thick. Head broader than the 
thorax, flat in front ; vertex broad ; sides of the face or genm dilated ; 
epistoma rather prominent. Eyes oblong. Antenna; small, resting 
in the cavity of the broad face ; 3rd joint elongate-conical, more than 
twice the length of the 2nd ; arista plumose. Thorax compact, 
slightly convex; scutellum large, conical. Abdomen short, conical, 
shorter and narrower than the thorax. Legs short, stout ; tibiae curved, 
especially the hind pair. Wings rather small ; alulae very large. Male. 
Sides of the face more dilated than those of the female, and forming 
an angle or short horn on each side. 
173. Pterogenia singu laris. Bigot , MSS. Mas et Fmm. Nigra, 
nitens, capite flavescentc-albo fasciis quatuor nigris, antennis pallide 
10 * 
