142 Mr. F. Walker's Characters of un described Dlpiera 



Anthrax argent'ilatus. 



Nigra, thoracis marginibus fulvo-pilosis, abdomine fulvo, lateri- 

 bus argenteo-tomentosis, alis basi costaque fuscis. 



Black ; thorax with tawny hairs in front and along each side ; 

 abdomen tawny, with silvery tomentum along each side, except at 

 the base and towards the tip ; wings wholly brown for near one- 

 fourth of the length from the base, and brown along the costa for 

 three-fourths of the length ; the outline of the brown part very 

 oblique and slightly concave. 



Length of the body 4 lines ; of the wings 10 lines. 



Port Natal. 



MADAGASCAR. 



Two groups and three species. 



ISLE OF FRANCE. 



One group and two species. 



DESERTS OF TARTARY, AND SOUTHERN COASTS OF THE CASPIAN SEA. 



One group and five species. 



PERSIA. 



One group and two species. 



ARABIA AND MESOPOTAMIA. 



(Exclusive of several species inhabiting the borders of the Red 

 Sea, and described in Klug's " Symbolae Physicae.") 

 Three groups and six species. 



SOUTH ASIA. 



Seven groups and forty-three species. 



The largest species of this region much resemble those of South 

 America, but those of Australia, as is usual in other genera, are 

 very different in structure. 



Group 7. Dipt. Saund. 165. 

 Anthrax latifascia. 



Nigra, thoracis margine antico lateribusque fulvo-pilosis, abdo- 

 mine fascid lata subauratd, apice argenteo, alis subcinereis, 

 basi costaque fuscis. 



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