MR WALKER, ON DIPTERA COLLECTED AT MAKESSAH. 143 



linear, rounded at the tip, full twice the length of the second ; arista 

 pubescent ; abdomen cylindrical, a little longer than the thorax, with 

 a white spot on each side in the middle ; legs unarmed, moderately 

 long ; wings dark grey ; veins black ; discal transverse vein straight, 

 upright, parted by a little less than its length from the border, and by 

 full twice its length from the pra;brachial transverse ; alulae white. 

 Length of the body 2 lines ; of the wings 34 lines. 



Gen. Helomtza, Fallen. 



158. Helomyza observans, n. s. Mas. Fulva, antennarum arti- 

 culo 3" conico brevi, arista plumosa, abdomine guttis quatuor dorsa- 

 libus nonnuUisque ventralibus nigris, segmentis albido marginatis, alis 

 subcinereis. 



Male. Tawny, with a few black bristles ; antennae short, 3rd joint 

 conical, less than twice the length of the 2nd ; arista plumose ; abdo- 

 men conical, not longer than the thorax, hind borders of the seg- 

 ments whitish, fourth segment with a black dot, fifth segment with 

 three black dots, some black dots along each side beneath ; wings 

 greyish ; veins black, testaceous at the base ; discal transverse vein 

 straight, upright, parted by full half its length from the border, and 

 by nearly twice its length from the prsebrachial transverse. Length 

 of the body 2i lines ; of the wings 5 lines. 



159. Helomyza tripunctifera, n. s. Fcem. Fulva, antennarum 

 articulo 3° conico, arista plumosa, abdomine fasciis pallidis guttaque 

 apicali atra, alis cinereis antice subluridis. 



Female. Tawny, with black bristles ; head whitish about the eyes ; 

 third joint of the antennae conical, hardly twice the length of the 2nd ; 

 arista plumose to the tip ; abdomen with a pale band on the hind bor- 

 der of each segment, and with a black apical dot ; wings grey, with a 

 lurid tinge in front ; veins black ; discal transverse vein straight, up- 

 right, clouded with brown, parted by less than its length from the 

 border, and by more than twice its length from the praebrachial trans- 

 verse. Length of the body 2 lines ; of the wings 4 lines. 



IGO. Helomyza copiosa, n. s. Fcem. Cinerea, capite vitta testa- 

 cea, antennis fulvis brevissimis basi nigris, arista plumosa, thorace 

 maculis plurimis fuscis, scutello fulvo basi nigro, abdomine nigro vitta 

 et segmentorum marginibus posticis fulvis, tibiis fulvo cinctis, alis 

 cinereis nigricante maculatis. 



Female. Cinereous ; head slightly ferruginous, with a dull testaceous 

 stripe on the front, whitish about the eyes ; epistoma not prominent ; 

 antennae tawuy, black towards the base, very short, not extending 

 beyond half the length of the face, 3rd joint conical, much longer 

 than the 2nd ; arista plumose ; thorax with three rows of various 

 brown spots ; scutellum ta^vny, black at the base ; pectus with brown 

 s])ots ; abdomen black, oval, not longer than the thorax, with a stri})e 



