WALKEE ON DIPTERA OF ABU ISLANDS. 85 



Female. Purple. Head brightly gilded, hind part silvery, underside 

 with white hairs ; mystax with six long black bristles ; pectus with 

 sijvery tomentum ; abdomen greenish blue, with spots of silvery to- 

 mentum along each side ; hind borders of the ventral segments white ; 

 wings slightly grey, blackish for full half the length from the tips and 

 along full three-fourths of the length of the hind border, veins black ; 

 halteres ferruginous, with black tips. Length of the body 7f luies ; 

 of the wings 14 lines. 



This species much resembles L. socia, but may be distinguished by 

 the difference of colour, and more especially by the more undulating 

 first branch vein, by the much less oblique third externo-medial vein, 

 and by the subanal vein, which is united to the anal vein much nearer 

 the border. 



29. Laphria sodalis, n. s. Mas. Cyanea, capite aurato, antenna- 

 rum articulo tertio fusiformi, thoracis lateribus purpureo-viridibus, 

 pectore ventreque argenteis, abdomine maculis lateralibus argenteis, 

 alis cinereis, apice posticeque nigricantibus. 



Male. Blue. Head brightly gilded, vertex and hind part silvery, un- 

 derside with white hairs ; mystax with four long black bristles, and 

 with several gilded bristles; third joint of the antennae elongate- 

 fusiform ; sides of the thorax varied with green and purple ; abdomen 

 with spots of silvery tomentum along each side, underside and pectus 

 silvery ; wings grey, black towards the tips and along half the length 

 of the hind border ; halteres white. Length of the body 7 lines ; of 

 the wings 13 lines. 



The veins of this species are hardly different from those of L. conso- 

 brina in structure, excepting the third externo-medial, which is united 

 to the fourth nearer the border. 



30. Laphria comes, n. s. Mas et FcBm. Viridi-cyanea, capite aurato, 

 antennarum articulo tertio fusiformi, pectore ventrisque lateribus 

 argenteis, abdomine viridi (mas) aut purpureo-cyaneo (fcem.) maculis 

 lateralibus argenteis, alis nigricantibus basi cinereis. 



Male and Female. Greenish blue. Head brightly gilded, hind part 

 silvery; mystax with six long black bristles; third joint of the an- 

 tennae elongate-fusiform ; pectus with silvery tomentum ; abdomen 

 green in the male, purplish-blue in the female, with silvery spots along 

 each side, underside with two silvery stripes; wings blackish, grey 

 at the base and along the costa for more than one-third of the length, 

 veins and halteres black. Length of the body 6-6^ lines; of the 

 wings 11-12 lines. 



This may be only a small variety of L. consobrina ; but the wings are 

 not darker towards the costa as in that species, and the first branch- 

 vein is much more straight. 



31. Laphria consors, n. s. Mas et Fasm. Viridis (mas) aut cyanea 

 (fcem.), capite aurato, antennarum articulo tertio brevifusiformi, pectore 



