ME. WALKER ON DIPTERA COLLECTED AT MAKESSAE. 139 



brachial ; alulae cinereous. Length of the body 2i lines ; of the wings 

 4^ lines. 



143. MuscA XANTHOMELA, n. s. F(£m. Nigra, capite albido, abdo- 

 mine ochraceo, alis subcinerascentibus, halteribus pallide testaceis. 



Female. Black ; head whitish about the eyes, which are red and bare ; 

 antennae not reaching the epistoma ; abdomen ochraceous, a little 

 shorter than the thorax ; wings slightly greyish ; veins black, testa- 

 ceous towards the base ; prajbrachial vein forming an obtuse angle at 

 the flexure, straight from thence to the border; discal transverse vein 

 straight, parted by less than its length from the border, and by more 

 than its length from the flexure of the praebrachial ; halteres pale tes- 

 taceous. Length of the body 2^ lines ; of the wings 4 lines. 



144. MuscA PR/EDiCENS, n. s. (Gen. Graptomyza, Desv.). Fcem. 

 Nigra, capite albido-cinereo, palpis antennis pedibusque nigris, thorace 

 vittis quatuor albido-cinereis, abdomine testaceo maculis nigris, alis 

 cinereis, halteribus testaceis. 



Female. Black ; head whitish cinereous ; frontalia deep black, linear, with 

 bristles along each side ; facialia without bristles ; epistoma not pro- 

 minent ; proboscis and palpi black ; antennae reaching the epistoma, 

 3rd joint about four times the length of the 2nd ; thorax with four 

 stripes, metathorax and pectus whitish cinereous ; abdomen testa- 

 ceous; four black spots on each segment excepting the 1st; legs 

 black ; wings cinereous ; veins black, testaceous towards the base ; 

 praebrachial vein forming a curve at its flexure, which is very near the 

 border ; discal transverse vein almost straight, parted by little more 

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

 the flexure of the praebrachial ; alulae and halteres testaceous. Length 

 of the body 3| lines ; of the wings 7 lines. 



145. MuscA coLLECTA, n. s. Mas. Viridis, cinereo tomentosa, ca- 

 pite albo antice testaceo, palpis antennisque fulvis, abdomine testaceo 

 apice viridi linea dorsali nigra, pedibus nigris^ tibiis obscure fulvis, alis 

 cinereis, halteribus testaceis. 



Male. Green, with cinereous tomentum ; head white, testaceous and 

 rather prominent in front ; eyes bare, contiguous ; epistoma slightly 

 prominent ; proboscis black ; palpi tawny ; antennae tawny, not near 

 reaching the epistoma, 3rd joint not more than twice the length of 

 the 2nd ; arista simple, more than twice the length of the 3rd joint ; 

 abdomen testaceous, green towards the tip, with a black dorsal line ; 

 legs black; tibiae dark tawny; wings grey; veins black, testaceous 

 towards the base ; praebrachial vein forming a very obtuse and much- 

 rounded angle at its flexure, from whence it is hardly curved inward 

 to its tip ; discal transverse vein curved outward, parted by much more 

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

 from the flexure of the praebrachial ; alula? pale cinereous, with testa- 

 ceous borders ; halteres testaceous. Length of the body 2| lines ; of 

 the wings 5 lines. 



