208 ME. F. WALKEK ON DIPTERA COLLECTED IN 



the 4th at sonic distance from the border ; halteres yellow. Length 

 of the body 10 lines ; of the wings 16 lines. 



2/. AsiLUS DiDYMOiDES, n. s. Foem. Fuscus, J. fenm'corwi valdeaffinis, 

 capita argenteo, mystace e setis paucis nigris albisque, palpis luteis, 

 antennis luteis articulo 3° nigro rainimo, thoracis vittis tribus scutello 

 pectoreque canis, abdomine fasciis cinereis apice nigro, pedibus fulvis, 

 alis cinereis apice nigricantibus, halteribus pallide fulvis. 



Female. Brown. Head silvery white, slightly clothed beneath with 

 white hairs ; epistoma convex ; mystax composed of some black and 

 white bristles. Eyes flat in front. Proboscis black, luteous at the 

 base; palpi luteous. Antennse black; 1st and 2nd joints luteous; 

 3rd conical, very small, not more than one-fourth of the length of the 

 arista. Thorax with three hoary stripes ; sides, scutellum, and pectus 

 hoary. Abdomen nearly flat ; hind borders of the segments cinereous ; 

 tip black, shining. Legs tawny, with a few black bristles. Wings 

 cinereous, blackish towards the tips ; veins black ; forks of the cubital 

 vein undulating ; 3rd externo-medial vein joining the 4th at a short 

 distance from the border ; halteres pale tawny. Length of the body 

 8 lines; of the wings 16 lines. 



Closely allied to the Celebes species A. tenuicornis ; but the abdomen is 

 broader and more flat, and the posterior femora have not black tips. 



Gen. Ommatius, Illiger. 



28. Ommatius noctifer, Walk. See Vol. IIL p. 88. 



29. Ommatius nanus. Walk. See Vol. V. p. 237. 



30. Ommatius retrahens. Walk. See Vol. III. p. 88. 



Gen. Leptogastee, Meigen. 



31. Leptogaster longipes. Walk. See Vol. IIL p. 89. 



Earn. LEPTIDJE, Westw. 

 Gen. Leptis, Fair. 



32. Leptis ferruginosa, Wied. See Vol. I. p. 118. 



Gen. Chetsopila, Macq^. 



33. Chrysopila stylata, n. s. Fcem. Fulva, capite antennis pedi- 

 busque nigris, pectore argenteo, abdomine fasciis tribus apiceque sty- 

 lato nigris, femoribus fulvis, alis subcinereis apices versus nigricanti- 

 bus, areolis margaritaceo maculatis. 



Female. Tawny, nearly allied to C. vacillans and to C. guttipennis. 

 Head and antennae black. Pectus silvery. Abdomen with three black 

 bands, black and stylate towards the tip. Legs black ; femora and 

 hind coxse tawny ; hind femora with black tips. Wings slightly cine- 



i 



A 



