the rijij-cascs and early stages of sonic CassuUthv. 11 



segments is the same as in A. puncticosta. The first five 

 abdominal spikes are expanded horizontally into trans- 

 parent lanceolate membranes beset around by spikelets. 

 The remaining four are greatly reduced, but the ninth 

 still carry the larval skins. 



Food-plant — Ipomo'a Itolosericea. 



This larva differs from those of A. tceta. and A. tigrina 

 by the fact that it retains in later life only the excrementi- 

 tious filaments of the earlier stadia, there being apparently 

 an anatomical difference in structure that renders this 

 species incapable of the feat that makes some of its con- 

 geners so remarkable. 



3. Asiyidomorpha conjlnis. 



PI. IV, fig. 22fl, 22?/. 



The larva of this species is flattish, and of the same shade 

 of green as the upper surface of the leaf of its food-plant 

 {Ipomoxi holoscricea). It bears the same number of spikes 

 as its allies, and the old larval skins are retained on its 

 ninth abdominal spikes. The skins are delicate and dry 

 up and are carried out straight behind, and in no way 

 hide the insect as in other species. It generally feeds 

 upon the upper-surface of the leaves and may possibly 

 find sufficient protection in its colour. 



The pupa is green, and the first five abdominal spikes 

 Hattish, and, except in colour, differs little from A. tccta. 



It is to be noticed that this species retains the old skins 

 in a manner similar to its congeners, but that the partial 

 inability of A. tccta to make use of excrementitious 

 filaments is in A. confinis complete. 



4. Asjndoviorpha tigrina. 



PI. IV, figs. 23«— 23(/. 



The larva of this species feeds generally on the under- 

 side of the leaf. In colour it varies from a light yellow 

 to green. It is surrounded with spikes similarly to A. 

 imncticosta, and the ninth abdominal spikes are enlarged. 



The tenth abdominal segment is very mobile and 

 retractile, and the excrement passes out in long slender 

 filaments and hardens on exposure to the air. When the 

 filament has reached a certain length the tenth segment is 

 curved upwards and the filament fixed to the base of the 

 ninth abdominal spikes. 



