48 



MR. K. M. SMITH ON CERTAIN SENSE-ORGANS 



Text-figure 17. 



Part of a transverse section througli the palp of Thereva sp. X 980. 



Wesclie (5) describes a large sense-organ on t\\e palpi of an 

 Empid, Ocidromia glahricula. This species I have not examined. 



DoLiCHOPODiDiE (Text-fig. 18), Species studied determined by 



C. G. Lamb. 



Text-fisuie 18. 



Part of a transverse section througli the antenna of Pcecilohotln-us nohilitatus. 



X980. 



