MR WALKER ON DIPTEBA COLLECTED AT MAKESSAB. 147 



Gren. OcHTHTBiriLA, Fallen. 



Ifil). OcHTHiPHiLA DiscoGLAUCA, n. s. Fam. Fusca, capite tho- 

 racisque disco glucescentc-albidis, arista plumosa, thorace lineis dnabns 

 lateralibus albidis, abdomine lineis transversis vittaque albidis, tibiis 

 tarsisqiie rufescentibus, alis cinereis, halteribus testaceis. 



Female. Brown ; head glaucous-whitish ; antenna; 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 baud on the hind border of each segment 

 and with a whitish stripe, the whitish hue a])pearing tawny in some 

 aspects ; tibia3 and tarsi reddish ; wings grey ; veins black ; discal 

 transverse vein straight, upright, parted by much less than its lengtli 

 from the border, and by nearly twice its length from the prsebracliial 

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

 wings 4 lines. 



Gen. CELTPnus, Dalman. 



170. Celyphus obtectus, Dalman. See Vol. I. p. 30. 



17 1. Celyphus scutatus, IVied. See Vol. I. p. 131. 



Subfam. Oetalides, Hal 



Gen. Lamprogasteb, Macq. 

 1/2. Lamprogaster marginifera. Walk. See Vol. II. p. 111. 

 Gen. Pteeogenia Bigot, MSS. 



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

 Caput thorace latins, antice planum, genis dilatatis. Antennce parvse ; 

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

 scutellum magnum. Abdomen thorace brevius et angustius. Pedes 

 brevesj validi ; tibiae arcuataj. ^te sat parvai ; alulae maximse. Mas. 

 Genae angulata;, valde dilatataj. 



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 gena; dilated ; 

 e[)istoma 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 ; aristii i)luniose. Thorax compact, 

 shghtly 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. 



1/3. Ptebogenia singulabis, Bigot, MSS. Mas et Fam. Nigra, 

 nitens, capite tlavescente-albo fasciis quatuor uigris, antennis pallidc 



10* 



