124 MAINE AGRICULTURAL EXPERIMENT STATION. 



never be troubled with them in such numbers again. We will 

 be pleased to investigate farther should they continue to trouble 

 you." 



DESCRIPTION OF CASES AND LARV.S;. 



Cases about three-fourths of an inch long and one-fourth 

 wide. Of the log-house pattern. They seem to be built of frag- 

 ments of water-lily stems. One of them ornamented with the 

 case of a smaller species. Fig. 7 shows six of these cases, 

 natural size. 



Larvae about three-fourths of an inch long. The portion 

 within the case pale brown ; the protruding thoracic segments 

 and head much darker. The portion within the case provided 

 with blunt hairs. The first abdominal segment enlarged and 

 produced into tubercles above at the sides and below, to attach 

 the larvae to the case. Fig. 6 shows the larva enlarged two 

 times. 



i 



