: SERICOSTOMATID&. 
plates on the metanotum, but has three pairs on the mesonotum. 
Thus G. calcarata seems to fall in neither of these genera. The 
adult, however, seems to agree best with the genus Gera. 
xe 
XD 
rasa 
Os 
aes 
= EES mez 
GOERA CALCARATA. 
129. Larva. Head and thorax. 131. Larva. Frons. 
130. Larva. Labrum. 132. Case. 
The Abdomen.—On the first segment the dorsal hump is well 
developed ; the lateral humps are present, but flattened. Branched 
gills and the lateral fringe are present. The drag-hooks are stout 
and bear but a single spur. 
DESCRIPTION OF THE CaseE.—The case, figure 132, has the 
form of a tube of fine sand grains. The tube is very slightly bent 
and is slightly flattened on the ventral side. Fastened to each side 
of the tube are heavy ballast stones—usually two to each side. 
Before pupation the larva places a stone over the opening at 
each end of the tube. Across the face of each stone a solid sheet 
of silk is spun. In the crevices between the stone and the tube 
a series of elongate respiratory openings are left. The case is 
fastened to its support by a stalk of silk at each end. 
The preparation for pupation, like the form of the case, is 
very similar to those of Neophylax. 
6 81 
