140 Mr. F. Walker's Characters of undescrihed Diptera 



Blackish piceous, partly ferruginous, with black hairs ; anterior 

 legs tawny ; hind legs thickly and deeply fringed with black hairs ; 

 wings lurid ; veins of the same colour. 



Length of the body 6 lines ; of the wings 14 lines. 



Valley of the Amazon. 



Group 10. Dipt. Saund. 167. 

 Anthrax lineata. 



Nigra, thoracis lateribus testaceo-pilosis, abdomine fasciis qua- 

 tuor pallide auratis, apice albo, alis limpidis, basi strigaque 

 subcostali fuscis. 



Black ; thorax with testaceous hairs along each side ; abdomen 

 with four pale gilded bands, first band near the base, second be- 

 yond the middle, hardly interrupted ; third and fourth slight, sub- 

 apical, tip with white hairs ; wings limpid, brown at the base, and 

 with a brown subcostal streak. 



Length of the body 3 lines ; of the wings 7 lines. 



Valley of the Amazon. 



Anthrax solita. 



Nigra, capite argenteo, thoracis lateribus fulvo-pubescentibus, 



abdominis segmentis tomento fulvo marginatis, alis limpidis, 



basi costaque interiore fuscis, venis nigris, halteribus tes- 



taceis. 



Black ; head silvery ; thorax with tawny pubescence on the 



borders, and on the margin of the scutellum ; hind borders of the 



abdominal segments with tawny tomentum ; wings limpid, brown 



at the base and along a short space of the costa ; veins black ; 



halteres testaceous. 



Length of the body 3| lines ; of the wings 8 lines. 

 Valley of the Amazon. 



Group 14. Dipt. Saund. 168. 

 Anthrax inexacta. 



Nigra, angusta, pedibus gracilibus, alis longiusculis sat an- 



gustis, bistriente basali oblique nigro-fusca, extus subcinera- 



scentibus. 



Black, narrow ; legs slender ; wings rather long and narrow, 



blackish brown on nearly two-thirds of the surface, the outline 



of the brown part extending from seven-eighths of the length of 



