148 MR. WALKER ON DIPTERA COLLECTED IN AMBOTNA. 



Proboscis tawny. Third joint of the antennae fussiform, its apical half 

 black. Legs rather stout, not incrassated. Wings slightly greyish ; 

 veins black, of the usual structure, testaceous at the base. Length of 

 body 3^ lines ; of the wings 7 lines. 



Gen. Ommatius, III. 



18. Ommatius noctifer. Walk. See vol. ii. p. 88. 

 Ommatius minor, Dol. Nat. Tijd. Ned. Ltd. 1857, p- 394. 



Fam. LEPTID^, Westw. 

 Gen. Leptis, Fahr. 

 If). Leptis ferruginosa, Wied. See vol. i. p. 118. 



Fam. BOMBYLID^, Walk. 

 Gen. Anthrax, Meig. 

 '20. Anthrax Pelops, IValk. See vol. ii. p. 90. 



21. Anthrax devecta, n. s. Foem. Cinerea, capite antico lurido. 

 thorace pilis fulvis, scutello rufo, abdomine nigro, fasciis tomentosis 

 interruptis pallide flavescentibus fasciisque duabus subapicalibus in- 

 terruptis albis, pilis lateralibus nigris basi flavescentibus, disco antico 

 fasciaque postica ventralibus albis, alis cinereis fulvo lineatis disco 

 nigricantibus. 



Group of .4. Tantalus, Female. Cinereous. Head lurid in front and 

 about the mouth. Antennae black ; 3rd joint lanceolate. Thorax 

 with tawny hairs in front and on each side ; pectus whitish, with 

 yellowish hairs on each side; scutellum red. Abdomen black, with 

 pale yellowish tomeutose interrupted bands ; the last two segments 

 with interrupted white bands ; sides with black hairs except at the 

 base, where the hairs are pale yellowish ; underside with a white disk 

 towards the base, where the hairs are white on each side ; a white 

 band hindward. Legs black. Wings grey, blackish in the disk, tawny 

 at the base, along the costa, and along some of the veins ; halteres 

 testaceous. Length of the body 7 lines; of the wings 16 lines. 



22. Anthrax emittens, n. s. Fam, Nigra, antennarum articulo 

 3° bi'cvissimo, pectore cinereo pilis albidis, abdomine fasciculis quatuor 

 lateralibus, fasciis ventralibus albido pilosis, alis angustis, costa dimi- 

 dioque basali nigris, halteribus apice niveis. 



Gvou^ oi A. degenera. Female. Black. Head cinereous behind, white 

 about the eyes. Third joint of the antennae very short. Pectus 

 cinereous, with whitish hairs. Abdomen clothed with black hairs. 



