NO. 3665 CADDISFLIES—FLINT 37h 
Abdomen with tergites dorsally on segments 1-9, 1 small lateral 
sclerite on segments 2 and 8, 2 sclerites on segments 3-7. Anal 
proleg with basal segment terete, short; claw sharply decurved. 
Pura.—Length 3 mm. Mandible sickle shaped, broad, without 
serrations. Labrum membranous. Hook-plates anteriorly on seg- 
ments 3-7, posteriorly on 3-5; each plate with many small teeth. 
Apex of abdomen with a membranous lobe containing genitalia. 
Casze.—Length 3 mm, width 1% mm. Silken, tightly attached to 
substrate. Larval case with round anterior and posterior openings. 
Pupa enclosed in an inner silken cocoon. 
MatTeErRIAL.—Holotype, male: Dominica, Clarke Hall, 17 April 1964, O. S. 
Flint, Jr.. USNM type 69892. Allotype, female: same data. Paratypes (many 
thousands of specimens taken at the following localities, on many dates throughout 
the year, and by most collectors): Clarke Hall, Fond Figues, Layou Valley, 
Layou River Mouth, Grand Bay, Rosalie, Cabrit Swamp, Trafalgar, 2.5 and 
3.5 miles north of Pont Casse, 1.6 miles west of Pont Casse, 1.3 and 2.2 miles 
east of Pont Casse. St. Lucia, Cul de Sac River at mile post 9, 29 July 1963, 
Flint and Cadet, 5o7; Vergallier River near Marquis, 2 Aug. 1963, Flint and 
Cadet, 2°. Grenada, 2 miles west of Grand Etang, 4-8 Aug. 1963, O. S. Flint, 
Jr., many o'c'9 9; Balthazar, 7 Aug. 1963, O. S. Flint, Jr., 407%. Guadeloupe, 
Petit-Bourg, Duclos, March 1966, J. Bonfils, many 7079 ¢. Other: Dominica, 
Fond Figues, 3 May 1964, O.S. Flint, Jr., larvae, o'9 metamorphotypes; 
Roseau River, 1 mile above Roseau, 23 July 1963, O. S. Flint, Jr., larvae and 
pupae; Layou River, 23-25 July 1963, O. S. Flint, Jr., larvae, o 9 metamorpho- 
types; Springfield, 20-26 July 1963, O.S. Flint, Jr., larvae, co 9 metamorphotypes; 
R. Laurent, Bells, 21 July 1963, O. S. Flint, Jr., larvae, o& 9 metamorphotypes; 
Pont Casse, 3.5 miles north, 5 Dec. 1964, P. J. Spangler, larvae and pupae. 
Brotogy.—This is the commonest species of Trichoptera on the 
island of Dominica. It is the only species that has successfully adapted 
to breeding in the large lowland rivers. The flat cases are attached in 
ereat abundance to the large boulders in the fast-flowing sections of 
these rivers. A few adults have also been taken near the small streams 
at high elevations; however, these may well have been carried up by 
winds from the lowlands. 
The species seems less abundant on St. Lucia and Grenada. On the 
latter, Z. antilliensis seems to be replaced in the lowland rivers by 
Z. anomaloptera. 
Zumatrichia anomaloptera, new species 
FiaureEs 80-84 
On the basis of head, genitalia, and spurs, this species is a typical 
member of the genus Zumatrichia; however, it is the only species so 
far discovered that has the patch of modified setae present on the 
basal half of the forewing in the male. 
AputtT.—Length of forewing 3 mm. Color brown; basal half of 
forewing of male with a large patch of deep brown, scalelike setae. 
