( Ixii ) 



will be seen to be longitudinally striped darker and lighter 

 all round, the stripes being of even width. In the freshly- 

 obtained cases this is very apparent, but in course of time a 

 uniform tone is assumed from the exposure to weather, and 

 also from the action of the water, when they are covered by 

 the tide. 



*' C mseniacella. — This species was found in large quantities 

 by sweeping Atrvplex portulacoides, Sueda ynaritwia, etc. Pre- 

 sumably its case should be of a dirty whitish colour, but as its 

 food-plants ai'e covered by the extremely muddy water of the 

 Thames, it becomes of all shades of dirty brown. In many 

 cases this case appears irregularly streaked, especially on the 

 under-side, where the additions to the width are usually 

 inserted, and the newer portions contrast in shade of brown, 

 and quantity of attached particles of mud. 



" C. argtntula. — This species is found commonly on Yarrow- 

 seed heads. Those exhibited were found in the S. Essex 

 marshes. I have also found cases at Hayes this autvimn. 

 The ground-colour of them is white, but they so soon get 

 covered by the dusty debris of the flowers, pollen, dried frass, 

 etc., and they bury themselves so considerably that they are 

 most inconspicuous. The larva occupies a seed-head for some 

 time before making a case, which at first is very flimsy and 

 easily crumpled. When an older case is detached from a seed- 

 head there generally comes away with it a silky continuation 

 made from its mouth into the interior of the flower-head, 

 apparently the lining of a tunnel formed between the various 

 seeds of the separate flowers in the head. 



" C. laripennella. — This species is found upon Chenopodium. 

 The cases shown were of the immature form, very flimsy, 

 composed of small pieces of the green seeds upon a thin 

 silken base, very stumpy and wide open at both ends at first. 

 After a while the anal end is drawn together in an irregular 

 kind of opening without definite valves. At a later stage the 

 case of this species has a much more substantial consistency 

 and a more definite form. 



" C. cesjntitiella. — One of our commonest species ; a rush 

 feeder. Those shown came from the Thames marshes, and 

 were under water at each high tide. In meadows, hillsides, 



