PLATE XX. 



Stiroma albomarginata. (Page 68.) 



Fig. 1. — Brachelytrous male. 



Fig. 1 a. — Brachelytrous female. 



Fig. 1 h. — Frons, showing the position of the forking 

 of the middle keel or carina. 



Fig. 1 c. — Profile of the head, showing the insertion 

 of the antenna. 



Fig. 1 d. — Pygofer of the same insect, showing the 

 anal tube and styles. 



Fig. le. — Part of the mider side of the female, 

 showing, at s, the saw, disengaged from its groove 

 between the large valves below. 



Fig. 2. — Larval form ? {Achrotile albosignata of 

 Fieber ?) For details see Plate XXL, figs. 2 and 2 a. 



Stiroma pteridis. (Page 71.) 



Fig. 3. — Brachelytrous male. 



Fig. 3 a. — Brachelytrous female. 



Fig. 3 b. — Frons and antennae of the female. 



Fig. 3 c. — End of the male pygofer, with its styles 

 and other details, x. The black cauda. Both this 

 figure and fig. 1 d are drawn inverted, and thus they 

 differ in position from the other figures of pygofers. 



