V. 



U@K 



^t 



ER1STAL1S. Mud Fly. 



1. .fi 1 . tenax. 5 a in.; bronze brown, with yellow hair around 



chest ; two spots and one band on body ; wing clear. 



2. E. fiavipes. fyfa in. ; black, and strongly yellow-haired : m> 



spots on body, but the first ring yellow hairy. 



3. E. bastardi. fa in. ; black : gray hairy ; four orange spots 



on bodv. 



4. E. saxorum. }' 2 in. : shiny black ; body with steel blue 



bands and yellow rings ; wing blackish brown. 

 E. dimidiatus. yi in. ; metallic black, with gray hair ; IM,,|\ 



with yellow spots ; leg joints white. 

 E. transvcrsits. T \ in. ; black ; chest yellow hairy ; body 



with yellow spots. 

 E. tcneus. -j 7 ^ in. ; bronxe brown ; gray haired ; marks 



indistinct. 



8. E. (.}fal/ota) posiicatus. -fa in. ; chest yellow hairy ; body 



black ; yellow at first ring and thickened hind shanks. 



9. E. cuprovittatus. y& '" i bronze green ; chest with coppery 



stripes ; joints of shanks yellow. 

 E. chrysostomus. 3/s i- : chest black, with four yellow 



stripes ; body rusty yellow, with white double spots ; first 



ring black. 

 E. brousi. |4 ' n - i chest brown hair}- ; body orange and 



black. 



(43) 



IO. 



I I 



