in the Collection of W. W. Saunders, Esq. 133 



J J Antennarum arista distincta, triarticulata. Ruppellia, Wied. 

 "f -f Antennarum articulus 3"' hirtus. Chyromyza, Wied. 



Thereva arida. 



Cinerea, subtus albida, capite callis duabus nigris subrotundis, 

 antennis apud apices nigricantibus, thorace vittis quinque 

 fuscescentibus interruptis, abdomine glaucescente, pedibus 

 fulvis, tarsorum articulis apice nigris, alis subcinereis, apud 

 costam luridis, venis balteribusque fulvis. 



Cinereous, whitish beneath ; head with two nearly round black 

 shining calli ; antennae blackish towards the tips ; thorax with five 

 slender, much interrupted, brownish stripes ; abdomen glaucous 

 hoary ; legs tawny, joints of the tarsi with black tips, terminal 

 joints wholly black ; wings slightly greyish, lurid along the costa ; 

 veins and halteres tawny. 



Length of the body 4 lines ; of the wings 6 lineg. 



Australia. 



Thereva scutellaris. 



Mas, — Nigra, antennis linearibus basi fulvis, thorace vittis dua- 

 bus pectoreque cinereis, scutello ardente rufo, abdominis 

 segmentis albo-marginatis, pedibus fulvis, alis limpidis, venis 

 balteribusque testaceis. 

 Male. — Black ; antennae linear, tawny towards the base ; thorax 

 with two cinereous stripes ; pectus cinereous ; scutellum very 

 bright red ; abdomen with a white band on the hinder border of 

 each segment ; legs tawny ; wings limpid, veins and halteres tes- 

 taceous. 



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

 Valley of the Amazon. 



Sub-fam. Nemestrinites. 



Contains about thirty-seven species, and is here divided into 

 four genera, Trichophthalma being combined with Hirrnoneura. 



SYNOPSIS. 



* Alae reticulatae. 



■f- Caput thorace angustius ; proboscis corpore longior. Moe- 

 gistorhynchus, Macq. 

 ■f -f Caput thoracis latitudine ; proboscis corpore non longior. 

 Nemestrina, Latr. 



