Plate IV. 



Fic. 



i(). Dental apparatus of Arabella iricolor, Montagu. 2i diam. 



17. Mandibles of the foregoing". 15 diam. 



22. f< tinted anterior hook of Lii iiibricoin-reis cavifrons, Gruhe. Zeiss oc. 2. ohj. 



D. + 3 in. draw-tube. 



23. Winged simple hook of the same species. Similarly magnified. 



24. Young examples of tiie same form with eyes, and the dental apparatus in 



si III. 50 diam. 



2^. Flook of Flahelli,iierii Mcyciizellcn (an var. atiiiiis sars). too diam. 



