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THE society's NOTE-BOOKS. 45 



Plates V., VL, VII. 



Figures illustrating Aiitennse of Diptera. 



Fig. 1. — Sargus, species of. 



2. — Stratiomys viridis. 



3. — Hcematopota pluvialis, ^ 



4.— Ditto, ditto, 5 



The differences of Figs. 3 and 4 appear to consist princi- 

 pally in the larger size of the latter ; the more globose outline 

 of the basal, and smaller size of the second joint, in the 

 female. 



Chrysops ccecutiens, Golden-eyed Gad-fly. 



Empis livida, Common Snipe-fly. 



Empis tesselata, another species of Snipe-fly. 



Gonipes (leptogaster) cylindricus. 



(I do not see any reason why the name of this fly should 

 have been altered to leptogaster, and prefer that adopted by 

 Westwood, which is well known and recognised. — Tuffen 

 West) 



9. — Diodria flcmpes. 



10. — Diodria (another species). 



,, 11. — Dolichopus (? species j. 



12. — Chrysotoxum (? species). 



13. — Erlstalis Q species). 



14. — Musca (? species). 



15 . — Tetanocera ferruginis. 



16. — Fam. Musddce, genus unknown. 



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 3) 



Plate VIII. 



Upper Half. Transverse Section of Cowrie Shell. 



Fig. 1. — Section through the entire shell to show the arrangement of 

 the difi"erent structures. 



,, 2. — Portion of the arch more enlarged. 



Lower Half. Figures illustrating Thrips (species unknown). 



Fig. 1. — Thrips, magnified 50 diameters. 



2. — The left anterior foot in its natural state seen from above. 



3. — Parts of the mouth, after Westwood. m. , Mandible; m.x., 

 maxilla, with its palp; I., labium, with its pair of minute 

 palpi ; m. , mentum. 



4. — Profile view of right anterior foot in its contracted condition. 



5. — The posterior limb of the right side, with the bladder-like 

 foot fully expanded. 



6. — End of Abdomen, showing a pair of minute saws. 



Figs. 2,^4, and 5 are from a Thrips infesting flowers of Datura 

 Stramonium. All drawn by Tuflen West. 



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