IN THE ANTENNA AND PALPI OF DIPTERA. 



39 



soleatus (Ent. Mo. Mag. 1893, p. 126), and to S-sbaped ones 

 being present on eacli alternate joint of the flagellum of Psychoda 

 revisenda (in litt., 23. ii. 1918). A pair of small bifid clisetaj is 

 present on each joint (except the last) of the flngellum in 



Text-figure 3. 



Segment of the flagellum of the auteniiic of Psi/cJioda alhipennis, showing the 

 triradiate process of one side iu plan. X 980, from a whole antenna in cedar- 

 wood oil. 



Psychoda heiigaleiisis Brun., and P. nigrijyennis Brun. (see 

 Brunetti, op. cit. p, 199), but no case of a triradiate process 

 has hitherto been recorded. Some species of Phlebotomus also 

 have pairs of shorter or longer geniculated spines on each joint 

 of the flagellum (see Brunetti, op. cit. p. 200, and Newstcad, 

 Bull. Ent. Research, v. 1914, figs. 4, 9, 10, &c.). 



CuLiciD^ (Text-fig. 4). 



In text-fig. 4, Avhich is a transverse section near the tip of the 

 antenna of Cidex pipiens, may be seen the sensilli, in this case 

 not deeply sunk as in Tipulida?, but of the basiconic type. 



Text-figure 4. 



C^. 



Nu. 



Transverse section through the middle of the antenna of Ctilex pipiens. X 



