1G2 Mil WALKEE ON DIPTEBA COLLECTED IN AMBOTNA. 



Thorax trausversus. Abdomen coutractum, declive, thorace bievius. 

 Pedes breves, inermes. Alse mediocres ; alulae maximae. 



Zygjenula, Dol. Nat. Tijd. Ned. Ind. 1858. 



Pterogenia, Bigot, MSS. 



Male. Body verj- broad, somewhat tumid. Head extremely broad, 

 broader than the thorax ; genae or sides of the face excessively dilated. 

 Antennae verj' small ; 3rd joint conical, not extending beyond half the 

 length of the face ; arista simple. Thorax a little broader than long. 

 Abdomen contracted, curved downward, shorter than the thorax. Legs 

 short, unarmed. Wings moderately broad ; discal transverse vein 

 upright, slightly curved outward, parted by about one-fourth of its 

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

 praebrachial transverse vein ; alulae very large. 



59. Zyg^nula PARADOXA. Mas. Cyanescente nigra, capite antennis 

 pedibusque testaceis, abdomine cyaneo, alis sublimpidis basi fusces- 

 centibus, venis flavescente albis basi nigricantibus, halteribus albidis. 



Zygaenula paradoxa, Dol. Nat. Tijd. Ned. Ind. 1858. 



Lamprogaster tetyroides, IValk. vol. iii. p. 112. 



Male. Bluish black. Head, anteimae, and legs testaceous. Abdomen 

 blue. Wings nearly limpid, brownish towards the base ; veins yellow- 

 ish white, blackish towards the base. Halteres whitish. Length of 

 the body 2i lines; of the wings 6 lines. 



Gen. Dacus, Fabr. 



60. Dacus longivitta, Walk. See vol. iii. p. 115. 



61. Dacus inscriptus, n. s. Fcem. Niger, capite fulvo macula elou- 

 gata nigricante, antennis fulvis, articulo 3° nigro basi fulvo, ai'ista 

 subpubescente, thorace subcinereo vitta dorsali strigisque duabus ob- 

 liquis fulvis, abdomine fusiformi basi vittaque dorsali fulvis, pedibus 

 fulvis, tibiis intermediis basi tibiisque posticis nigricantibus, alis cine- 

 reis angustis apice fuscis macula discali subapicali cinerea, gutta dis- 

 cali fusca, halteribus testaceis. 



Female. Allied to D. bilineatus. Black. Head tawny, with an elon- 

 gate blackish spot above. Antennae tawny, almost reaching the epi~ 

 stoma ; 3rd joint black, very elongate conical, tawny at the base ; 

 arista very minutely pubescent. Thorax slightly cinereous, with a 

 dorsal tawny stripe, and with two oblique tawny streaks on each ^ide. 

 Abdomen fusiform, as long as the thorax, tawny at the base, and with 

 a dorsal tawny stripe. Legs tawny, slender ; middle tibiae blackish 

 towards the base ; hind tibiae blackish. Wings grey, narrow, lurid 

 along most of the costa, brown towards the tips, near which there is a 

 a discal grey spot ; a brown dot on the pra;brachial transverse vein ; 

 discal transverse vein almost straight, upright, parted by one-fourth 

 of its length from the border, and by much more than its length from 

 the ])raebrachial transverse; halteres testaceous. Length of the body 

 5 lines ; of the wings 9 lines. 



