MR. WALKER ON DIPTEEA COLLECTED IN AMBOTNA. 147 



race antico pectoreque argenteo-albidis, abdomine cylindrico maculis 

 lateralibus trigonis albidis, pedibus robustis viridi aut purpureo variis 

 albo pilosis, tibiis anticis subtus fulvo tomentosis, alis cinereis basi lim- 

 pidis, baltei'ibus albidis. 

 Female. Structure like that of the preceding species. Bright metallic 

 blue, slender. Head gilded, silvery-cinereous behind and beneath, 

 with a broad ocbraceous baud on the face ; mystax with a few long, 

 slender black bristles. Proboscis and antenna; black ; 3rd joiut of 

 the latter fusiform. Thorax in front and pectus silvery whitish. Ab- 

 domen cylindrical ; segments with whitish triangular spots on the sides 

 of the hind borders, which are whitish beneath. Legs stout, partly 

 green or purple, with white hairs and black bristles ; fore tibia; with 

 tawny tomentum beneath. Wings cinereous, limpid towards the base ; 

 veins black ; halteres whitish. Length of the body 5i lines ; of 

 the wings lU lines. 



13. Laphria socia. Walk. See vol. iii. p. 84. 



Laphria Kollari, Dol. Nat. Tijd. Ned. Ind. 1857, p. 396. 



14. Laphria Taphius, Walk. Cat. Dipt. Brit. Mus. 2. 380. 

 Inhabits also the Philippine Islands. 



15. Laphria comes. Walk. See vol. iii. p. ^b. 



16. Laphria ampla, n. s. Fceyn. Nigra, obseura, latiuscula, capita 

 aurato, antennarum articulo 3" sublanceolato, maculis duabus humera- 

 libus pectoreque aureo tomentosis, abdomine lineari segmentis P, 2", 

 3''que ochraceo fasciatis, pedibus rufis crassis aurato pilosis, alis nigri- 

 cantibus basi cinereis, halteribus albidis. 



Female. Black, dull, rather broad. Head brightly gilded, with gilded 

 hairs; mystax with a few black bristles. Third joint of the antennae 

 somewhat lanceolate, nearly twice the length of the 1st and 2nd to- 

 gether. Two humeral spots on the thorax and pectus, with gilded 

 tomentum. Abdomen linear; 1st, 2nd, and 3rd segments with orange 

 bands on the hind borders. Legs red, thick, with gilded hairs and 

 bristles. Wings blackish, cinereous at the base ; veins black ; halteres 

 whitish. Var. fi. Abdomen wholly black. Length of the body 8 lines ; 

 of the wings 16 lines. 



17. Laphria puer. Fam. Testacea, cinereo pilosa, capite aurato, 

 antennarum articulo 3° fusiformi apice nigro, pedibus sat robustis non 

 incrassatis, alis subcinereis, venis nigris basi testacis. 



Laphria \mc\; Dol. Nat. Tijd. Ned. hid. 1858. 



Female. Testaceous, with pale cinereous hairs. Head with pale gilded 

 tomentum. Mystax with a few pale bristles; cpistonm quite Hat. 



