398 W, H. HARRIS ON THE DENTITION OF THE DIPTERA. 



All these particulars are conformed to by certain Diptera, and ^ 

 subject to the liraitations I have set upon their use in the 

 previous portion of my paper, I feel perfectly justified in 

 adhering to the use of the word '' teeth/' — W. H. H. 



Explanation of Plate 19. 



Teeth of Flies. 



Fig. 1. CaUiophora erythrocephala,^ x 40. 



„ 2. Polietes lardaria, x G5. 



,, 3. Mydciea urbana, x 40. 



,, 4. Spilogaster sp., x 65. 



„ 5. Morellia hortorum, x 40. 



,, 6. Musca dmnestica, x 100. 



,, 7. Hydrotaea irritans, x 40. 



„ 8, Scatophaga calida, X 40. 



,, 9. „ stercorariay x 65. 



,, 10. ,, scyhalaria ? X 65. 



,, 11. Caricea tigrina, x 65. 



,, 12. Caenosia sexnotata, x 140. 



5, 13. Schaenomyza litorella, x 140. 



,, 14. Stomoxys calcitrant, x 140. 



[In illustration of this paper Mr. Harris has very kindly 

 presented to the club a number of excellent preparations of the 

 teeth of Flies. These may be borrowed in the usual way upon 

 apphcation to the Hon. Curator. — Ed.] 



Joum. Quekett Microscopical Club, Ser. 2, Vol. VJIL, No. 52, Apnl 1903. 



