122 WALKEB ON DIl'TEEA OF ARU ISLANDS. 



bands; wings slightly greenish, with a blackish interrupted costal 

 stripe containing luteous streaks ; discal transverse vein clouded with 

 brown ; veins in structure like those of the preceding species ; hal- 

 teres testaceous, with black tips. Length of the body 6 lines; of the 

 wings 13 lines. 

 This species at first sight seems like a variety of the preceding one, but 

 the petioles of the eyes are shorter and thicker, the costal stripes of 

 the wings are interrupted, and the shade on the discal transverse 

 vein is more diffuse. 



149. AcHiAS AMPLiviDENS, n. s. Foem. Fulva, subtus testacea ; oculis 

 extantibus non petiolatis; thorace submetallico,vittis quinque cinereis ; 

 abdomine purpureo basi testaceo, tibiis tarsisque nigris ; alis sub- 

 cinereis, costa nigro-fusca, venis transversis nigro-fusco nebulosis. 



Female. Tawny, testaceous beneath. Head testaceous ; eyes very pro- 

 minent, but hardly petiolated ; antennae tawny ; thorax slightly 

 metallic, with five cinereous stripes, which are abbreviated hindward, 

 the inner pair slender ; abdomen purple, testaceous at the base ; legs 

 black ; coxse and femora testaceous, the latter with black tips ; wings 

 slightly greyish, costal stripe brown, blackish towards the tip ; prae- 

 brachial transverse vein clouded with blackish, discal transverse vein 

 clouded with a much paler hue than that of the prsebrachial trans- 

 verse vein, in structure like those of the two preceding sf)ecies; 

 halteres testaceous, with black tips. Length of the body 4^ lines; 

 of the wings 9 lines. 



Subfam. ? 



Gren. POLTAEA, n. g. 



Mas. Corpus longiusculum. Caput transversum; facies lata, plana, 

 non obliqua. Palpi lati. Antennce parvae; articulus tertius longi- 

 conicus; arista plumosa. Thorax oblongo-subquadratus. Abdomen 

 sublineare, thorace multo longius et angustius. Pedes breves, tenues. 

 AlcB latiusculae ; venaj optime determinatse ; venae duae transversae inter 

 venas radialem et cubitalem ; vena praebrachialis apicem versus valde 

 flexa. 



Male. Body rather long. Head transverse, a little broader than the 

 thorax; face broad, flat, vertical. Palpi broad. Antennae small; 

 third joint elongate-conical, not extending more than half the length 

 to the epistoma ; arista plumose. Thorax oblong-subquadrate. Ab- 

 domen nearly linear, much longer and more slender than the thorax. 

 Legs short, rather slender; fore femora somewhat setose beneath. 

 Wings rather broad, flat in repose ; veins very strongly marked ; a 

 transverse vein between the cubital and mediastinal veins ; two trans- 

 verse veins between the radial and cubital veins ; cubital vein slightly 

 angular between the pracbrachial transverse vein and the tip of the 

 wing ; praebrachial vein much curved tovv£U'ds its tip. 



