104 WALKEB ON DTPTEEA OP AEU ISLANDS. 



Q-en. MuscA, Linn, 



9Q. MuscA GLORiosA, n. s. (genus Silbomyia, Macq.). Fcem. Cyaneo- 

 viridis, capite Is&tissiine aurato frontalibus atris, antennis pedibusque 

 nigris, thorace vittis quatuor cupreis, pectore maculis quatuor albis, 

 abdomine viridi-cyaneo, vitta tenui purpurea, alls cinereis apud costam 

 nigris, alulis albis. 



Female. Golden green. Head brilliantly gilded, frontalia deep black, 

 widening towards the face -, a brilliantly-gilded lanceolate streak be- 

 tween the antennae, which are black ; epistoma piceous, slightly pro- 

 minent ; thorax with four cupreous stripes ; pectus with four white 

 tomentose spots ; abdomen greenish blue -with a very slender purple 

 stripe ; legs black, femora blackish green ; wings grey, black for full 

 one-third of the breadth from the costa, praebrachial vein forming a 

 very obtuse angle at its flexure, from whence it is nearly straight to its 

 tip, discal transverse vein very slightly undulating, parted by less 

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

 from the flexure of the praebrachial ; alulae pure white. Length of the 

 body 6 lines ; of the wings 12 lines. 



97. MuscA OPULENTA, n. s. (gcnus Silbomyia, Macq.) Fcem. Aureo- 

 viridis, capite aurato, frontalibus atris, antennis piceis, thorace vittis 

 quatuor subobsoletis cupreis, pectore maculis duabus albis, alis cine- 

 reis apud costam nigris, alulis albis. 



Female. Golden green. Head brightly gilded, frontalia deep black, 

 linear, epistoma piceous, slightly prominent; antennae piceous; thorax 

 with four almost obsolete cupreous stripes ; pectus with a spot of 

 white tomentum on each side; abdomen vvith a very indistinct cu- 

 preous stripe J tibiae and tarsi black ; wings grey, black along the 

 costa, praebrachial vein forming a right angle at its flexure, near 

 which it is shghtly curved inward, and is thence straight to its tip, 

 discal transverse vein undulating, parted by more than half its length 

 from the border and from the flexure of the praebrachial; alulae white. 

 Length of the body 4i lines ; of the wings 8 lines. 



98. MuscA MACULARis, n. s. (genus Chrysomyia? Desv.) Mas et 

 Foem. Aureo-viridis, capite argenteo antice aurato frontalibus atris, 

 antennis pedibusque nigris, thorace vittis tribus cupreis vix conspicuis, 

 scutello cyaneo, pectore maculis quatuor lateralibus albo tomentosis, 

 abdomine viridi-cyaneo maculis quatuor lateralibus albis, alis cinereis 

 basi nigricantibus, alulis nigricantibus. 



Male and Female. Golden green. Head brightly gilded, white behind ; 

 antennae, tibiae, and tarsi black ; thorax with three indistinct cupreous 

 stripes ; scutellum blue ; pectus with two white tomentose spots on 

 each side ; abdomen greenish blue with two transverse white spots 

 on each side; femora blackish-green; wings grey, blackish at the 

 base, praebrachial vein forming a slightly obtuse angle at its flexure, 

 nearly straight from thence to its tip, discal transverse vein curved 



