122 me. walker's catalogue of dipterous insects 



Male. Bright greenish-blue, slender. Face extremely narrow. Antennae 

 black. Abdomen dark bluish-purple. Legs testaceous ; tibiae hardly 

 spinose ; hind femora black ; hind tibiae blackish, with testaceous tips. 

 Wings greyish, rather broad, brownish along the costa ; veins black ; 

 praebrachial vein hardly curved, forming an almost imperceptible angle at 

 its junction with the discal transverse vein which is nearly straight. Hal- 

 teres testaceous. Length of the body If line ; of the wings 3| lines. 



G-en. Diaphortjs, Meigen. 



92. Diaphortjs delegatus, n. s., fcem. Viridis albido-tomentosus, antennis 

 nigris, abdomine aeneo-viridi basi testaceo, pedibus testaceis, tarsis nigris, 

 tibiis posticis fuscescentibus, ahs subcinereis venis nigris, halteribus tes- 

 taceis. 



Female. Green, with whitish tomentum. Proboscis and antennae black. 

 Abdomen aeneous-green, testaceous towards the base. Legs testaceous ; 

 tarsi black ; hind tibiae brownish. Wings greyish ; veins black ; prae- 

 brachial vein and discal transverse vein almost straight. Halteres tes- 

 taceous. Length of the body 2| lines ; of the wings 4 lines. 



Earn. SYEPHIDJE, Leach. 

 Gen. Ceria, Fair. 



93. Ceria Javana, Wied. See page 17. 



G-en. Eristalis, Latr. 



94. Eristalis niger, Wied. See page 17. 



95. Eristalis arvorum, Fabr. Syst. Ambl. 235. 14. 

 Inhabits also Java and China. 



96. Eristalis Andraemon, Walk. Cat. Dipt. pt. 3. 627. 

 Inhabits also Hindostan. 



Gen. Helophilus, Meigen. 



97. Helophilus insignis, Walk. See page 17. 



Gen. Merodon, Fabr. 



98. Merodon vaeicolor, n. s., fcem. Atra, antennis nigris, arista testacea, 

 thorace postico cinereo, scutello fulvo, abdomine basi fulvo segmentis 

 testaceo-fasciatis, pedibus nigris, ahs subcinereis apud costam fuscis venis 

 nigris, halteribus testaceis. 



Female. Deep black. Head with hoary tomentum in front. Antennae black ; 

 arista testaceous. Thorax cinereous towards the scutellum, which is tawny. 

 Abdomen with testaceous bands; base tawny. Legs black. Wings slightly 

 greyish, mostly dark brown along the costa ; veins black. Halteres testa- 

 ceous. Length of the body 8 lines ; of the wings 12 lines. 



Gen. Xylota, Meigen. 



99. Xylota conformis, Walk. See page 18. 



