86 WALKER OK DIPTERA. OF ARU ISLANDS. 



argenteo, abdoraiue seneo-viridi (mas) aut cyaneo-purpureo (foem.) 

 maculis lateralibus argenteis, alls nigricantibus, basi cinereis. 



Male and Female. Green (male) or blue (female). Head gilded, hind 

 part silvery; mystax with a few black bristles; third joint of the an- 

 tennae short-fusiform ; pectus silvery ; abdomen seneous-green in the 

 male, bluish-purple in the female, with silvery spots along each side ; 

 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 4|— 5 lines ; of the wings 8-9 lines. 



The straight and not obhque third externo-medial vein distinguishes this 

 species from all the preceding Laphrice, 



32. Laphria germana, n. s. Fosm. Cyanea, facie aurata, antenna- 

 rum articulo tertio longissime subfusiformi, abdominis maculis late- 

 ralibus pectoreque argenteis, alis cinereis, basi subcinereis, halteribus 

 albis. 



Female. Blue. Head gilded in front, vertex and hind part silvery; 

 mystax with six black bristles ; third joint of the antennae very long, 

 subfusiform ; pectus silvery ; abdomen purplish blue, shorter than in 

 the preceding species, with silvery spots along each side ; wings grey, 

 slightly grey towards the base ; halteres white. Length of the body 

 3-^ lines; of the wings 7 lines. 



33. Laphria flagrantissima, n. s. Mas. Rufescente-eervina, capite 

 aurato, antennis pedibusque rufescentibus, thorace vittis tribus la- 

 tissimis (lateralibus abbreviatis) pectoreque nigricantibus, alis lutes - 

 centibus, plaga postica interiore fasciaque latissima exteriore nigri- 

 cantibus. 



Male. Reddish fawn colour. Head gilded; mystax with numerous 

 gilded bristles ; mouth lanceolate, very stout ; antennae reddish, third 

 joint long, lanceolate, abruptly acuminated at the tip ; thorax with 

 three very broad blackish stripes ; disk of the pectus black ; abdomen 

 with the segments darker towards the base, underside black towards 

 the tip ; legs reddish, stout ; tarsi with black bands beneath ; wings 

 somewhat luteous, with a large blackish patch on the hind border 

 near the base, and with a very broad blackish band near the tip ; 

 halteres testaceous. Length of the body 11 lines; of the wings 

 22 lines. 



34. Laphria justa, n. s. Mas. Lutea, capite aurato, ore, antennis 

 apice, thoracis maculis duabus posticis, pectore, abdominis fasciis 

 latis femoribusque nigris, alis cinereis, apud costam luridis. 



Male. Luteous. Head gilded ; mystax with numerous gilded bristles ; 

 mouth short, black ; antennae reddish tawny, third joint lanceolate, 

 black except at the base ; thorax with the disk somewhat darker, two 

 large black spots hindward ; pectus black ; abdomen linear, with a 

 broad black band on the fore border of each segment ; femora black 

 above except at the tips, hind femora black also beneath ; wings 



