420 Miss G. Riciu-do — A Revision of 



Erax asiloides, Macquart. 



Type probably destroyed. 



Described as black. Abdomen with yellow segmentations. 

 Legs black, posterior femora at base and tibiae red. Wings 

 with no appendix. 



Length, $ , 6 lines without ovipositor. 



From the figure of wing this species hardly appears to 

 belong to this genus. 



Erax caudatus, Fabricius. 



Placed by Schiner in this genus, but not known to him. 



Described as a female, 11 lines. 



Yellow, with brown stripes; abdomen black, with golden 

 bands and light honey-yellow legs. Beard white. Moustache 

 of seven yellowish bristles. Wings yellowish. 



From Australia. 



^rax fuscipennis, Macquart. 



Described as black. Thorax golden-coloured, with black 

 stripes. Legs black ; tibiae testaceous, black at apices. 

 Wings brown. 



Length Og lines. $ . 



Erax plantaris, Thoms. 



Described as brown. Allied to Neoaratus hercules, Wied., 

 but ivings not dilated in the middle and colour of abdomen 

 different. Antenna yellow. Abdomen yellow, at base olive. 

 Legs chestnut ; knees and tarsi black, posterior tibiae yellow. 



Length 23 mm. ^ . 



From Australia. 



Erax Salomon, Macquart. 



Seen in Paris Museum, 12. 4. 11. 



Type a male. Abdomen half gone and in a bad state. 



Face Avith a large protuberant tubercle, bearing the 

 moustache. Antennae black, the first two joints with black 

 hairs, the third reddish, small and conical, with a long 

 terminal arista almost the length of the entire antenna. 

 Legs black, tibiae testaceous ; the bristles mostly black, some 

 yellow ones on the femora. Wings dilated, neuration very 

 similar to that of Erax completus, Macq. (see Dipt. Exot. 

 i, (2) pi. ix. fig. 9), but the posterior branch of fork of third 



