164 MK. WALKER ON DIPTERA COLLECTED IN AMBOTNA. 



is prominent. Antennae not reaching the epistoma ; 3rd joint very 

 elongate-conical ; arista very minutely pubescent. Thorax aeneous 

 black ; dorsal strijie, humeri, sides of the prominent scutellum, a band 

 on each side, and disk of the pectus tawny. Abdomen reddish 

 tawny, cylindrical, almost linear, much longer and narrower than the 

 thorax. Posterior femora with minute black spines beneath ; fore 

 tibiae and fore tarsi piceous. Wings rather long, slightly brownish, 

 almost limpid in most of the disk, with two incomplete and diffuse 

 brown bands ; veins black, tawny towards the base ; discal transverse 

 vein straight, upright, parted by about one-third of its length from 

 the border, and by more than its length from the praebrachial trans- 

 verse vein ; halteres testacous. Length of the body 6 lines ; of the 

 wings 10 lines. 



Gren. EioxA, Walk. 



65. RioxA? BIMACULA.TA, n.s. Fwm. Fulva, eapite supra ochraceo, 

 antennis brevissimis, articulo 3o conico, arista plumosa, pectore ab- 

 domineque piceis, hoc maculis duabus basalibus fulvis, femoribus pos- 

 terioi'ibus nigris, femoribus anticis subtus setosis, tibiis posterioribus 

 piceis, alis nigricantibus longiusculis basi vitreis, guttis duabus dis- 

 calibus, maculis duabus trigonis costalibus maculisque duabus margi- 

 nalibus albis, halteribus albidis. 



Female. TawTiy, with black bristles. Head ochraceous above, whitish 

 behind. Antennae very short ; 3rd joint conical, a little longer than 

 the 2nd ; arista plumose. Thorax with whitish pile on each side ; pec- 

 tus piceous. Abdomen piceous, elliptical, a little shorter than the 

 thorax, with a tawny spot on each side at the base. Posterior femora 

 black ; fore femora thickly setose beneath ; posterior tibiae mostly 

 piceous. "Wings blackish, rather long, vitreous at the base, with two 

 white dots in the disk, with two triangular white spots on the costa, 

 and with two more on the hind border ; discal transverse vein straight, 

 upright, parted by about half its length from the border, and by more 

 than its length from the praebrachial transverse; halteres whitish. 

 Length of the body 4 lines ; of the wings 8 lines. 



Gen. Tbypeta, Meiff. 



66. Trypeta transiens, n. s. Nigra, eapite fulvo supra nigro, an- 

 tennis rufescentibus, articulo 3° longi-conico, arista pubescente, tho- 

 race vitta lateribusque cinereis, scutello, femoribus posterioribus apice 

 pedibusque anticis fulvis, alis subcinereis fasciis quatuor deviis fulvis 

 nigricante marginatis, l''(abbreviata) et 2* apud discum connexis, 2% 3% 

 et 4" apud costam connexis, 4" obliqua postice furcata, furca exteriore 

 apicali. 



Black. Head tawny, black above, except in front and behind; face 

 piceous. Palpi and antennae reddish ; 3rd joint of the latter elongate- 

 conical, reaching the epistoma; arista pubescent. Thorax with a 

 cinereous stripe ; sides and pectus cinereous ; scutellum tawny; fore 



