Manchester Memoirs, Vol. Iviii. (1914), iV^. 4- 7 



glands of the larv^ of PJir omnia Jiiarginella, obtaining 

 specimens from Gimgatenagap in Ceylon at an altitude of 

 2,165 feet. They were found on January 26th on Salacia 

 reticulata, a plant belonging to the Hippocrateaceae. They 

 state that the wax glands are situated beneath a chitinous 

 disc, placed at the extremity of the abdomen, and divided 

 into a series of twenty plates. These plates are arranged 

 in four rows — two rows to the right and two to the left of 

 the anal and genital apertures. Each plate is studded with 

 small pores, which are the orifices of the wax glands 



Text-fig. — Vertical section through a wax plate of a larva 

 of Phromnia margiiiella, showing the pores in the cuticle 

 and the elongate wax-secreting cells beneath. (After Bug- 

 nion and Popoff.) 



-secreting the long white filaments. In addition, there are 

 also three small plates on either side of the sixth abdominal 

 segment, two on either side of the fifth, and one or two on 

 either side of the fourth. There are also scattered isolated 

 pores on the dorsal side of the body, which is powdered 

 with a small amount of wax. As shown in the accom- 

 panying text-figure, the cuticle covering the wax plates is 

 very thick and traversed with vertical striae. Beneath 

 the cuticle is the hypodermal layer, chiefly evident by its 



