248 MR. walker's catalogue oe dipterous insects 



about the eyes ; arista bare ; thorax with a cinereous stripe along each 

 side ; abdomen dark red ; sutures blackish ; underside and legs tes- 

 taceous ; wings slightly cinereous, with three brownish transverse 

 lines ; 1 st line extending from the base of the cubital vein ; 2nd in- 

 cluding the prtebrachial transverse vein, and extending thence to the 

 costa, where it is dilated ; 3rd short, subcostal, opposite the discal 

 transverse vein ; veins testaceous ; discal transverse vein straight, 

 upright, parted by one-fourth of its length from the border, and by 

 very much more than its length from the discal transverse ; halteres 

 testaceous. Length of the body 5-6 lines ; of the wings 10-12 lines. 



63. Lamprogaster BASALis, n. s. Mas. Cyanea, viridi purpureo- 

 que subtincta, capite testaceo supra nigro, pectore ferrugineo, ab- 

 doraine vitta postica diffusa rufescente, pedibus testaeeis, alis sub- 

 cinereis vitta costali nigra vittaque exteriore ochracea. 



3Iale. Blue, slightly tinged with green and purple ; head testaceous ; 

 vertex black ; mouth striped with black ; arista black, bare ; pectus 

 mostly ferruginous ; abdomen with a diffuse reddish stripe hindward, 

 piceous beneath ; legs testaceous ; wings slightly cinereous, with a' 

 black stripe along half the length of the costa, and with a narrower 

 ochraceous stripe from thence to the tips ; veins testaceous, black 

 towards the basg ; praebrachial vein slightly angular where it is joined 

 by the discal transverse ; the latter slightly curved, parted by less than 

 half its length from the border, and by hardly more than its length 

 from the praebrachial transverse ; halteres testaceous. Length of the 

 body 5-6 lines ; of the wings 10-12 lines. 



64. Lamprogaster ventralis, n. s. Mas et Fcem. Fulva, capite pe- 

 dibusque testaeeis, thorace cyanescente subtincto, abdomine purpureo 

 basi testaceo, alis cinereis apud costam subochraceis. Mas. Abdo- 

 mine subtus hamis duobus couicis testaeeis. 



Male and Female. Tawny ; head testaceous ; mouth mostty piceous ; 

 arista pubescent ; thorax with a slight bluish tinge ; abdomen purple, 

 testaceous at the base ; legs testaceous ; wings cinereous, slightly 

 ochraceous along the costa ; veins testaceous ; discal transverse vein 

 slightly curved, parted by full one-third of its length from the border, 

 and by much more than its length from the praebrachial transverse ; 

 praebrachial vein very slightly angular ; halteres testaceous. Male. 

 Abdomen with a conical testaceous appendage on each side beneiith. 

 Length of the body 5 lines; of the wings 10 lines. 



Gen. PoTiCARA, n. g. 



Mas et Fam. Corpus latmsculum. Caput brevissimum. Palpi parvi. 

 Antennae epistoma non attingentes ; articulus 3"^ linearis, 2° quadru- 

 plo longior ; arista plumosa. Abdomen angustum, thorace paullo 

 longius. AliB subdilatatae ; costa convexa. 



