I. TRÄGÅRDH, LEPIDOPTEROUS LEAF-MINERS 



23 



the leaf which is above the labrum to flow into the mouth- 

 cavity. 



2) The function of the 2nd class of structures seems also 

 to be to faciliate the passage of the food into the mouth- 

 cavity. These structures are of two kinds: one for the ab- 

 sorbtion of fluids; and the other for solid food. 



Fig. 35. Tischeria ekebladella. Labrum, ventral aspect. X 435. 



Fig. 36. Same with top of hypopharynx and maxillse, dorsal aspect. X 435. 



To the former we must refer the filiform appendages on 

 the hypopharynx and upper side of the maxillae in Eriocrania 

 (figs. 46—48) as well as the tufts of hairs on the labrum, 

 hypopharynx and palpiger of Tischeria (figs. 50—52). Their 

 structure suggests that their function is to faciliate the en- 

 trance of liquid food into the mouth cavity by the aid of 

 capillary attraction. 



The other structures consist 1) of the fringes and filaments 

 at the median side of the mandibles of Tischeria (fig. 39) 



