Vorhies—Studies on the Trichoptera of Wisconsin. 703 
to the lower part of the foregoing parts of the inferior appen¬ 
dage. 
Larva. —Length, 10-11 mm. Width, 1.5 mm. Abdomen 
green in life. Head, thorax, and legs light straw yellow\ The 
head is conspicuously spotted with dark brown; four rows of 
spots occupy the j>osterior median portion; anterior to these, 
lie three others, the middle one a little in front of the other two, 
and just anterior to the latter a very small fourth one; the outer 
two form the posterior ends of two semicircles, each of which is 
composed of four spots, the convexity of the curve outward; the 
two small spots forming the anterior ends of these semicircles 
have a similar pair anterior to them, the four forming a square; 
anterior to these, and a little wider apart, are two pairs of 
slightly elongated spots. On either side of the head, back of 
the eye, is a triple row of 4-5 spots each, two of which may be 
seen in dorsal view, and beneath these are two more small spots. 
Extending caudad from the base of the first maxilla is a.brown¬ 
ish blotch, followed by five or six brown spots. Mandibles 
stout, the distal portions brown. Antennae rather long, straw 
yellow. Clypeus small, and not readily distinguishable. The 
prothorax has a distinct elongated spot on each side near the 
border, a lighter curved pair near the median line on the pos¬ 
terior edge, and six more light ones lying along this edge may 
be seen in dorsal view; one or two small ones may be seen 
farther down if the larva be turned somewhat; the outer part 
of the posterior edge is bordered with dark brown. The meso- 
thorax is but little chitinized and only a few pale spots are vis¬ 
ible. The third pair of legs are swimming legs, the larva being 
an active swimmer. The lateral line is present, but is composed 
of almost microscopic white hairs. Gills simple; those given in 
the diagram (Fig. 12) as being above the lateral line are so 
