54 



THE GRANNOM 



a coronet of spines on the sixth ventral seg- 

 ment. The maxillary palpi are short, hairy, 

 and upturned, and the genitalia are shown in 



FlG. 25. Genitalia of Goera pilosa, 

 from above. 



FIG. 26. Genitalia of Silo 

 nigricornis, & , from above. 



Fig. 26. A fly very similar in general characters 

 suo paiiipes. but still smaller is Silo pallipes, which occurs 

 plentifully on the Dove and other rivers. 



Family . . SERICOSTOMATID^E 

 Genus . . Brachycentrus 

 Species . . subnubilus 

 Spurs, 2.3.3. 



PLATE XI 



The grannom (Brachycentrus subnubilus) is 

 a fly of value to the trout fisherman, partly in 

 tempting big fish to come to the surface, but 





