MR WALKER OIH DIPTERA COLLECTED AT MAKESSAR. 147 



Gen. OcHTiiiPiiiLA, Fal 



16!). OcHTHiPHiLA DiscoGLAUCA, n. s. Fcem. Fusca, capite tho- 

 racisque disco glucescente-albidis, arista plumosa, thorace lineis duabus 

 lateralibus albidis, abdomine lineis transversis vittaque albidis, tibiis 

 tarsisqiie rufescentibus, alis cinereis, halteribus testaceis. 



Female. Brown ; heaxl glaucous-whitish ; antennae black, nearly reach- 

 ing the epistoraa ; 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 praebrachial 

 transverse ; halteres testaceous. Length of the body 2 lines ; of the 

 wings 4 lines. 



Gen. Celyphus, Dalman. 



170. Celyphus obtectus, Dalm.an. See Vol. I. p. 30. 



171. Celyphus scutatus, Wied. See Vol. I. p. 131. 



Subfam. Oetalides, Haliday. 

 Gen. Lamprogaster, Macq. 



172. Lamprogaster marginifera, Walk. See Vol. II. p. 111. 



Gen. PTEROftENiA Bigot, MSS. 



Mas et Foem. Platystomati affinis. Corpus breve, latum, crassum. 

 Caput thorace latins, antice planum, genis dilatatis. AntenncB parvae ; 

 articulus 3"^ longi-conicus ; arista plumosa. Thorax subconvexus ; 

 scutellum magnum. Abdomen thorace brevius et angustius. Pedes 

 breves, validi ; tibiae arcuatae. AIcb sat parvat ; alulae maximae. Mas. 

 Genae angulatse, valde dilatatae. 



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 genae dilated ; 

 epistoma rather prominent. Eyes oblong. Antennae 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 singularis. Bigot, MSS. Mas et Foim. Nigra, 

 nitens, capite flavescente-albo fasciis quatuor nigris, antennis pajlide 



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