W, WESCHE OX SOME NEW SENSE-ORGANS IN DIPTERA. 103 



(4) Organs are described on G. eqici, S. chameleon, and 2?. hortu- 

 lanus, which are thought to be typical olfactory organs. 



(5) Three new organs, probably sense-organs, are described 

 whose function is not known. 



EXPLAXATIOX OF PLATES 6 AND 7. 



Plate C. 



TASTE HAIRS AXD OTHER SEXSE-ORGAXS OF IXSECTS. 



Fig. 1. Taste hairs on the ligula of Vespa vubjaris. 



,, 2. Taste hairs on the maxilla of Yespa vulgaris (Will's 

 taste cups). 



,, 3. Taste hairs on the ligula of V. crabro. 



,, 4. Taste hairs on the maxilla of V. crabro. 



„ 5. Taste hairs on the maxilla of V. crabro. 



., 6. Long taste hair on the tip of the maxillary palpus of 

 the honey bee (Aj)is melijica). 



,, 7. Short taste hairs on the same part. 



,, 8. Short taste hairs on the maxillary palpus of the cock- 

 roach [Blatta orientalis). Similar structures are found 

 on the labial palpi. 



„ 9. Long taste hairs on the paraglossa of Blatta orientalis. 



,, 10. Long taste hairs on the labium of Panorpa communis. 



„ 11. Taste hairs on the paraglossa of Phora incrassata. 



„ 12. Taste hairs on the paraglossa of CaUiphora erythrocepkala. 



,, 13. Right fore-tibia of Chersodromia cursitans, <$ . The sense- 

 organ is on the inner or left side. 



„ 14. A portion of the left fore-tibia of H. femoratus, ? , 

 showing the sense-organ. 

 - ,, 15. Left middle femur, trochanter, and coxa of Aphrosyhis 

 raptor, showing the right or inner side ; a indicates 

 the position of the sense-organ (Structure A). 



,, 16. Right fore-tibia of C. cursitans, £, showing the left side. 



,, 17. Upper part of left fore-tibia of II. femoratus, $, seen at 

 another ansrle. 



„ 18. Right middle trochanter of A. raptor. The right or 

 outer side is seen, bearing the second sense-organ 

 (Structure B). 



., 1 ?. The sense-organ shown in Fig. 15, enlarged (Structure A). 



