i:ill 



84 JOURNAL OF ENTOMOLOGY AND ZOOLOGY 



part of the front femur adjoining the tibia is somewhat membranous 

 and is overspread with minute conic teeth; the inner edge of the 

 trochanter and femur of the front leg is armed with a single row of 

 long straw-colored hairs, and the femur is armed also with a row 

 of short spines on its inner edge; the second and third pairs of legs 

 are much alike; the inner edge of the femur is armed with a line of 

 sharply pointed spines of two kinds, one kind, apparently very rigid, 

 is dark in color and arises from well-defined sockets; these spines 

 are separated by one, two or three spines of lighter color and appar- 

 ently less rigidity, which do not arise from sockets; the spines in 

 detail are shown (Fig. 3). 



Figure 15 illustrates diagrammatically the arrangement of gills on 

 the left side of the abdomen. 



Pupa 



Length : 10-13 mm. 



Breadth: 3-3.5 mm. 



The mandibles are strongly chitinized. The antennas reach 

 to the tip of the abdomen. The dorsal plates of the abdomen 

 and armature of the dorsal surface of the 1st segment are shown 

 (Fig. 9) ; the hooks of the second series on the 5th segment are not 

 borne on a single plate, but occur as independent chitinous pieces 

 forming a line across the dorsum of the segment. Figure 10 shows 

 the hooks in detail. A few minute setae occur on each segment, these 

 are slightly longer and more numerous on the last segment; the 

 lower sides of segments 1-7 bear narrow obliquely downward-point- 

 ing lines of dark color; the last segment is shaped like an obtuse 

 arrow head. When viewed from above it bears two curved proc- 

 esses which are equal to a little more than half its length. The 

 lateral fringe is better developed than that of the larva; it begins 

 behind the middle of the 5th segment and ends on the ventral side 

 of segment eight. 



The Case, Fig. 6, is 15-18 mm. long, 3-3.5 mm. wide at its anterior 

 end and about 1.5 mm. wide at its posterior end; it is constructed 

 of minute twigs, root fibers and fragments of wood cut to the proper 

 length to give even and straight edges gradually diverging toward 



