100 WALKER ON DIPTEEA- OF AEU ISLANDS. 



tending to the epistoma, third joint cinereous, hardly widening from 

 the base to the tip, which is somewhat truncated, arista slender, very 

 much longer than the third joint ; thorax with four indistinct black 

 stripes ; scutellum feiTuginous hindward ; abdomen conical, not 

 longer than the thorax, with three broad, slightly interrupted, cine- 

 reous bands, second segment indistinctly ferruginous on each side ; 

 legs stout ; wings grey, slightly brownish in front, veins black, testa- 

 ceous towards tlie base, praebrachial vein forming an obtuse angle at 

 its flexure, hardly curved inward from thence to its tip, discal trans- 

 verse vein very slightly undulating, parted by much less than its 

 length from the border and from the flexure of the praebrachial; 

 alulae whitish. Length of the body 4'^ lines ; of the wings 8 hues. 



86. EuRYGASTER DECiPiENS, n. s. F(Em. Nigra, aureo-tomentosa, 

 capite antico argenteo frontalibus atris, antennis ferrugineis, thorace 

 vittis quatuor nigris, abdomine fulvo subtessellato vitta basali nigra, 

 pedibus fulvis, alis cinereis. 



Female. Black, stout, with gilded tomentum. Head silvery white in 

 front and beneath, frontalia deep black, widening slightly towards 

 the upright face, the bristles on each side hardly extending to the 

 facialia, epistoma not prominent ; eyes bare ; antennae ferruginous, 

 extending to the epistoma, third joint linear, somewhat truncated at 



' the tip, more than four times the length of the second joint, arista 

 slender, much longer than the third joint ; thorax with numerous 

 long bristles, with four slight black stripes ; pectus cinereous ; abdo- 

 men tawny, conical, not longer than the thorax, with short stout 

 bristles, and with three broad, slightly gilded, somewhat interrupted 

 bands, a short black stripe at the base; legs tawny, stout, tibiae 

 darker than the femora, tarsi piceous ; wings grey, somewhat darker 

 in front, veins black, praebrachial vein forming a right angle at its 

 flexure, near which it is much curved inward, discal transverse vein 

 nearly straight, parted by more than half its length from the border, 

 and by a little less than its length from the flexure of the praebrachial ; 

 alulae slightly cinereous. Length of the body 4 lines ; of the wings 

 7 lines. 



87. EuRYGASTER PHASioiDES, u. s. Mtts. Nigra, cano-tomentosa, 

 capite albo frontalibus atris, antennis, scutello, abdomine femoribusque 

 fulvis, abdomine fasciis duabus posticis albidis vittaque nigra, alis 

 cinereis basi albis, costa plagaque nigricantibus. 



Male. Black, with hoary tomentum. Head white, frontalia deep black, 

 widening towards the upright face, facialia with bristles along more 

 than half the length from the epistoma, which is not prominent ; 

 eyes bare ; palpi testaceous ; antennae tawny, extending to the epi- 

 stoma, third joint linear, slightly rounded at the tip, more than 

 four times the length of the second joint, arista slender, much longer 

 than the third joint ; thorax with four very slender black stripes ; 



