WALKEE ON DIPTEEA OF AEU ISLANDS. 89 



veins black ; halteres testaceous. Length of the body 4 lines ; of the 

 wings 7 lines. 



Gren. Leptogastee, Meigen. 



43. Leptogaster ferrugineus, n.s. Mas. Ferrugineus, pectore albo, 

 abdomine nigro, segmentorum marginibus ventreque testaceis, pedibus 

 fulvis, feraoribus apice nigris, tibiis piceo vittatis, tibiis posticis tar- 

 sisque nigris basi testaceis, alis sublimpidis, halteribus testaceis apice 

 piceis. 



Male. Ferruginous. Head pale, gilded in front, hind side and pectus 

 white; mouth and antennae tawny, the latter blackish towards the 

 tips J abdomen black ; hind borders of the segments and under side 

 testaceous ; legs tawny -, anterior femora with a testaceous band before 

 the tips, which are black ; hind femora and anterior tibiae striped with 

 pieeous, the latter black towards the tips ; tarsi and hind tibiae black, 

 testaceous at the base ; wings very slightly greyish, veins black ; 

 halteres testaceous, pieeous towards the tips. Length of the body 

 7 lines ; of the wings 10 lines. 



44. Leptogaster longipes, n. s. Mas. Ferrugineus, pectore albido, 

 abdomine piceo, segmentis apice fulvescentibus, pedibus anterioribus 

 fulvescentibus, posticis piceis longissimis, femoribus posticis basi tes- 

 taceis, alis subcinereis basi obscurioribus costa venisque nigris, halte- 

 ribus testaceis apice nigris. 



Male. Ferruginous. Head testaceous in front; mouth and antennae 

 black ; pectus whitish ; abdomen pieeous, hind borders of the seg- 

 ments somewhat tawny; legs somewhat tawny; hind legs pieeous, 

 very long, their femora testaceous at the base ; wings slightly greyish, 

 darker towards the base, costa and veins black ; halteres testaceous, 

 with black knobs. Length of the body 4 lines ; of the wings 8 hues. 



45. Leptogaster albimanus, n. s. Mas. Niger, capite antico pec- 

 toreque albis, antennis basi ferrugineis, abdominis segmentis cano 

 fasciatis, femoribus, tibiis tarsisque basi albis, femoribus posticis luteo 

 fasciatis, alis limpidis, halteribus albidis apice piceis. 



Male. Black. Head in front and the pectus white ; antennae ferruginous 

 at the base ; abdomen long, a hoary band on the hind border of each 

 segment ; femora, tibiae, and tarsi white at the base ; hind legs long, 

 rather stout ; hind femora with a luteous band ; wings limpid, veins 

 black; halteres whitish, with pieeous knobs. Length of the body 

 5 lines ; of the wings 7 lines. 



Earn. LEPTID^, Westw. 

 G-en. Leptis, Fair. 



46. Leptis ferruginosa, Wied. See Vol. L p. 118. 



Gen. Chetsopila, Macq. 



47. Chrysopila vacillans, n. s. Mas et Fcem. Lutescens, capite 



