WALKER ON DIPTEKA OE ARU ISLANDS. 103^ 



hardly widening towards the face ; thorax with three black very di- 

 stinctly marked stripes, the middle one dilated on the scutcUum ; 

 abdomen distinctly tessellated with six large cinereous excavated 

 spots; wings grey, precbrachial vein forming a right angle at its 

 flexure, near which it is much curved inward, and is thence straight 

 to its tip, discal transverse vein hardly undulating, parted by much 

 less than its length from the border, and by little more than half its 

 length from the flexure of the prscbrachial ; alulae white. Length of 

 the body 5 lines ; of the wings 10 lines. 



93. Sarcophaga invaria, n. s. Mas etFcem. Nigra, cinereo-tomen- 

 tosa, capite maris albo, thorace vittis quinque nigris, abdomine tessel- 

 lato, alis cinereis. 



Male and Female. Black, with cinereous tomentum. Thorax with five 

 black stripes, the lateral pair incomplete ; abdomen distinctly tessel- 

 lated, the spots being much excavated -, wings grey, prajbrachial vein 

 forming a right angle at its flexure, near which it is much curved 

 inward, and is thence straight to its tip, discal transverse vein hardly 

 undulating, parted by much less than its length from the border, and 

 by rather more than half its length from the flexure of the prsebra- 

 chial ; alulaj white. Male. Head silvery white, frontalia deep black, 

 linear ; tomentum of the thorax and of the abdomen more whitish 

 than that of the female. Female. Frontalia slightly widening towards 

 the face. Length of the body 4-44^ lines ; of the wings 8 lines. 



Subfam. MrsciDES, Walk. 



Gen. Idia, 3Ieigen. 



94. Idia australis. Walk. Cat. Dipt. pt. 4. 809. == /. o c a.^U^^c^'Uz^ , kk'e.a\ 

 Inhabits also Australia. 



95. Idia ^qualis, n. s. Fam. Mnea, capite subtuberculato, thoracis 

 lateribus pectoreque albido-testaceis lineis duabus lateralibus ajneis, 

 abdomine fulvo fasciis tribus seneis, pedibus testaceis tibiis apice 

 femoribusque seneis, alis cinereis apice nigricantibus. 



Female. iEneous-whitish, testaceous beneath. Head with minute tuber- 

 cles on each side of the front, frontalia piceous, linear ; thorax with 

 an aeneous stripe on each side in a line with the base of the wings, 

 and with numerous points between these lines and the disk ; abdomen 

 pale tawny, with three seneous bands on the hind borders of the seg- 

 ments; legs testaceous, tibia3 towards the tips and femora aeneous; 

 wings greyish, with blackish tips, prsebrachial vein forming an obtuse 

 and much-rounded angle at its flexure, from whence it is almost 

 straight to its tip, discal transverse vein parted by about half its length 

 from the border and by about its length from the flexure of the pra;- 

 brachial ; alulae very slightly cinereous ; halteres testaceous. Length 

 of the body 3| lines ; of the wings 6 lines. 



