10-4 W. WESCHB ON SO.ME NEW SENSE-ORGANS IN DIPTERA. 



Fig. 20. Left fore-tibia of G. cursitans, $ , showing a longer tube 

 than that in Fig. 13. 

 „ 21. Left fore-tibia of Ocidromia glabricula, <$, showing the 



right or inner side. 

 „ 22. Right fore-tibia of Hyhos femoratus, J 1 , showing another 

 view of the situation of the ciliated sense-organ. 



Plate 7. 



OLFACTORY ORGANS OF DIPTERA. 



Fig. 1. Diagram of the structure on the third joint of the 

 antenna of Stratiomys chameleon, L. 

 „ 2. One of the larger pits. 



„ 3. One of the larger pits which has lost some of the pegs or 

 styles. 



4. Diagram of the structure of one of the larger pits on the 

 third joint of the antenna of Gastropldlus equi, F. 



5. Sense-organ at the base of the arista of G. equi. 



6. Appearance of the pits on the third joint of the antenna 

 of G. equi, as they generally appear. 



7. Diagram giving the supposed appearance of the structure 

 shown in Fig. 4, when seen in section. 



8. Olfactory organ on the second joint of the palpus of Bibio 

 hortidanvs. 



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 11 



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Jonrn. Quekett Microscopical Club, So: 2, Vol. IX., Ko. 55, November, 1904. 



