Dec, I91S-] Lloyd: New York Trichoptera. 207 



white and revealing a sparse armature of very minute spines. The 

 distribution of this rust-like coating is nearly uniform in different 

 individuals and it seems apparent that it is a secretion from the skin. 



Head. — Marked above as in pi. 15, fig. 8; the sides are light brown 

 without sharply defined marks but, on caudal portion, bearing many 

 small inconspicuous spots where the muscles are attached; the ventral 

 side is uniformly light brown, except the extreme caudal portion 

 which is crossed by the area of dark spots extending downward from 

 the sides; the antennae are jet black, except an area at the base, which 

 is brown; the labrum, pi. 16, fig. 10, is light brown bordered with dark 

 brown; the mandibles are jet black, truncate, with fine teeth and a 

 rather sparse brush of light colored hairs on the edge of the groove; 

 of these hairs the most cephalic are shorter and thicker. 



Thorax. — The dorsal markings are shown in pi. 15, fig. 8. The 

 prothorax bears minute forward-pointing spines on its cephalic dorsal 

 margin ; its setae are long, some equal to the length of the segment ; a 

 raised, black, collar-like ridge extends from the base of the legs over 

 the dorsum of the caudal margin of the segment, except at the 

 median area, where it is broken ; the ventral surface is white, except 

 a brown mark which bears two darker marks near its caudal mar- 

 gin; and a small darker spot behind each leg; the fleshy horn is 

 curved and well developed. The mesothorax is white beneath with 

 four dark spots near the caudal margin. The metathorax is white 

 on the under side with two broken dark marks. 



Legs. — Brown with darker margin and armed with numerous long 

 black setae. 



Abdomen. — The humps are well developed, the dorsal hump bears 

 a pointed, finger-like process and the lateral humps are rounded; 

 groups of setje occur at the sides of the humps ; about six large setae 

 and several small ones occur on the ventral surface of the first seg- 

 ment; other segments do not bear large setae on their ventral sur- 

 faces; segments two to seven bear single small setae on each side of 

 the median line above; segment eight bears a row of about ten setae 

 across its ventral margin ; segment nine has an oval chitinous plate 

 on the dorsum which bears four large and many small setae ; each 

 drag-hook has three small teeth at its base and is preceded by a chiti- 

 ous plate bearing about ten setee; a row of three large setae occurs 

 inside of each drag-hook and behind the chitinous plate ; the lateral 



