218 LIST OF DIPTERA. 



Zweif. i. 211, h, 1. 14, /. 30. Leptis Ibis, Fair. Syst. And. 

 70, 5. Schaff. Icon. t. 107,/. 5, 6. Atherix maculatus, Latr. 

 Gen. Crust, iv. 289. Meig. Klass. Zweif. i. 294, 1. Sylvicola 

 melancholia, Harris, Ex. 103, pi. 31, 2, /. 1. 



a. England. 



b. France. 



Atherix variegata, Barnstoris MSS. Fusca, capite pectore iho- 

 racisque vittis duabus cinereis, abdomine nigro fulvo fasciato, 

 antennis nigris, pedibus fulvis, femoribus piceis, alis cinereis 

 fusco variis. Fern. — Humer is fulvis, abdomine cinereo fasciato, 

 femoribus fulvis. 



Most closely allied to A. Ibis, but differs slightly in the colour 

 of the abdomen and of the wings. Head hoary and clothed with 

 black hairs, which are most thick beneath ; its appendages also 

 black: chest brown and clothed with black hairs, adorned with two 

 hoary stripes ; its sides and the breast also gray and clothed with 

 hoary hairs : abdomen black and clothed with black hairs ; hind 

 borders of the segments tawny, and, with the exception of the first 

 segment, clothed with pale hairs ; borders of the tirst segment all 

 tawny, with the exception of the fore border and a notch in the mid- 

 dle (in A. Ibis it is all tawny excepting a triangular spot on the 

 middle of the disk) ; second segment also tawny, excepting a trian- 

 gular spot whose fore angle comes near to the hind angle of the 

 notch in the preceding segment ; in the third and fourth segments 

 the hind border only is tawny; fifth and sixth segments black ; se- 

 venth segment tawny : on the under-side all the segments are tawny, 

 with black hind borders : legs tawny, clothed with short black hairs ; 

 hips and thighs mostly piceous, clothed with pale hairs ; feet darker 

 towards the tips : wings gray, varied with brown, especially at the 

 base and along the fore border ; they have not the slight tawny tint 

 that prevails along the fore borders of the wings of A. Ibis, and dif- 

 fer especially from that species in the absence of the yellow brand 

 which characterizes the latter ; poisers tawny, with piceous knobs. 

 Var. (3. — Only the second, third and fourth segments of the abdomen 

 have tawny hind borders, and these bands are slightly narrower in 

 the middle of the disks. Fern. — Head hoary in front and around 

 the eyes: shoulders tawny: abdomen black; hind borders of the 

 segments gray (in A. Ibis they are broader and have a tawny tinge) : 

 legs dark tawny and clothed with short black hairs ; hips and tro- 

 chanters gray ; feet darker towards the tips. Length of the body 

 3 — 4 lines ; of the wings 8 — 10 lines. 



a. St. Martin's Falls, Albany River, Hudson's Bay. Presented by 

 G. Barnston, Esq. 



