LIST OF DIPTERA. 265 



Anthrax Demogorgon, n. s. Nigra, pilis rufis hirta, capitis vertice 

 scutelloque ferrugineis, abdominis lateribus nigro ciliatis, anten- 

 nis nigris, pedibus ferrugineis, tarsis piceis, alis nigro-fuscis 

 maculis una magna fulva tribusque limpidis guttisque duabus 

 limpidis, apice subcinereis fusco bivittatis. 



Body black : head clothed with black hairs, ferruginous between 

 the eyes, tawny in front : mouth tawny ; feelers and sucker black : 

 eyes dark red : chest and breast, and especially the latter, clothed 

 with red hairs ; scutcheon ferruginous, excepting the fore border : 

 abdomen dull black, piceous beneath, clothed with red hairs, and 

 having a fringe of black hairs on each side : legs dark ferruginous, 

 beset with black bristles ; feet piceous : wings blackish brown, 

 having near the fore border in middle of the length a large ferrugi- 

 nous spot, which also stretches along the borders of the veins ; be- 

 neath this there are three colourless spots, which occupy as many 

 areolets, — the first nearest to the hind border is small, the second is 

 larger, the third is triangular and larger; beyond the latter and 

 nearer to the hind border there are two very small, and sometimes 

 almost obsolete, colourless spots ; the tips of the wings are pale 

 gray, excepting two stripes which follow the curves of the veins and 

 are joined together at each end ; wing-ribs and veins piceous ; 

 poisers tawny, their knobs piceous above. Length of the body 6 

 lines ; of the wings 16 lines. 



a. Florida. Presented by E. Doubleday, Esq. 



The fork on the base of the fourth areolet on the hind border, 

 reckoning from the base of the wing, is longer than that of A. Hal- 

 cyon. 



Group XVII. 



Anthrax bipunctata, Fabr. Syst. Antl. 118, 4. Wied. Dipt. Exot. 

 i. 138, 28. Auss. Zweif. i. 286, 42. 



Group XVIII. 



Anthrax melaleuca, Wied. Auss. Zweif. i. 299, 61. 

 a. Brazil? 



Anthrax hyalacra, Wied. Auss. Zweif. i. 315, 84. 

 a. Brazil? 



