128 walker on diptera of aru islands. 



Key Island. 



Fam. ASILIDiE, Leach. 



Subfam. Lapheites, Walk. 



Gren. Laphria, Fabr. 



1. Laphria paradisiaca, n. s. Mas. Ciiprea, aureo pilosa, capite 

 pectoreque argenteis albo pilosis, mystace subaurato setis nonnullis 

 nigris, abdomine apice purpureo subtus albido piloso, pedibus cyaneo- 

 purpureis albido pilosis, femoribus cyaneo-viiidibus, alis nigricantibus 

 basi cinereis, halteribus albidis nigro notatis. 



Male. Cupreous, with gilded hairs. Head and pectus silvery, with 

 white hairs ; mystax slightly gilded, with a few long black bristles ; 

 antennae and mouth black; abdomen purple at the tip, underside 

 clothed with long whitish hairs, silvery white at the base, the follow- 

 ing segments bordered with silvery white; legs blue and purple, 

 thickly clothed with long whitish hairs, femora bluish-green, fore 

 tibiae with pale gilded down beneath, hind tibiae with a black bristly 

 apical tuft beneath ; wings blackish, grey towards the base ; halteres 

 whitish, marked with black. Length of the body 11 lines; of the 

 wings 20 lines. 



2. Laphria placens, n. s. Mas. Cyanea, capite aurato, mystace 

 setis paucis longis nigris ; antennis nigris, articulo tertio fusiformi ; 

 pectore albido, abdomine angusto, femoribus intus tibiisque purpureis ; 

 alis nigricantibus basi cinereis, halteribus piceis. 



Male. Blue. Head gilded in front, whitish behind; mystax with a 

 few long black bristles ; proboscis and antennae black, third joint of 

 the latter fusiform ; pectus whitish ; abdomen cylindrical, much nar- 

 rower than the thorax, and about twice its length; femora on the 

 inner side and tibiae purple, tarsi black ; wings blackish, cinereous 

 towards the base ; halteres piceous. Length of the body 4^- lines ; 

 of the wings 8 lines. 



Subfam. Asilites, Walk. 

 Gen. AsiLiJS, Linn. 



3. AsiLus SUPERVENIENS, u. s. Mtts. Cincrcus, capite subaurato, 

 mystace aurato setis paucis nigris, thorace vittis tribus latissimis 

 nigris, abdomine fulvescenti-cinereo, pedibus rufescentibus, femoribus 

 nigro vittatis, tarsis nigris, alis cinereis apice nigricantibus, halteribus 

 testaceis. 



Male. Cinereous. Head slightly gilded, pale cinereous, and clothed 

 with pale hairs behind; mystax composed of gilded bristles, above 

 which there are a few shorter black bristles ; antennae black, third 

 joint elongate-fusiform, arista much longer than the third joint ; 

 thorax with three very broad hardly divided black stripes ; abdomen 



