NO. 3665 CADDISFLIES—FLINT (23 
directed shelf best seen in lateral aspect; bursa copulatrix well devel- 
oped with apicomesal supports, and an elongate central opening. 
Larva.—Length to 9 mm. Head brown, paler anteriorly and around 
eyes; with many short, pale, secondary setae. Mouthparts as shown; 
mandibles symmetrical. Thoracic notae brown. Foreleg short and 
broad, mid- and hindlegs longer; tibia of mid- and hindlegs with a 
row of spinelike setae anteriorly. Metasternum with lateral groups 
of 9-12 setae. Spacing humps low. Sternum of first abdominal segment 
with a pair of short 2 or 3 branched gills; second sternum with a pair 
of very short protuberances. No lateral line. Eighth segment with a 
lateral line of 12 small sclerotic points. Ninth tergite with 2 pairs of 
dark setae. Anal claw with a single large dorsal accessory tooth. 
Pura.—Length 7 mm. Mandibles and labrum as shown. Frons 
with 2 pairs of long setae; 2 setae between eye and base of mandible; 
1 pair between antennae; 4 setae on basal antennal segment. Meso- 
notum with many setae. Antennae wound around apex of abdomen 
many times. No tarsal hair fringe. Hook-plates anteriorly on segments 
3-6, posteriorly on 5; plates 3, 4, and 5A similar, 6A slightly smaller. 
Apical processes slightly sclerotized, tip curved sharply dorsad. 
Casr.—Length 15 mm. Evenly tapering and conical; made mostly 
of sand grains, sometimes with large wholly silken areas. Posterior 
end dorsally with a projecting, hoodlike silken structure, ventral part 
of hood open to interior. 
MartertaL.—Holotype, male: Dominica, Pont Casse, .4 miles east, emerged 
11 May 1964, O. S. Flint, Jr., USNM type 69909. Allotype, female: same data. 
Paratypes: same, but emerged 9 May 1964, 1719 ; same, but emerged 10 May 
1964, 167; same, but 16 May 1964, 1<7; same, but emerged 18 May 1964,1019 ; 
same, but 15 June 1964, 2719; same, but 23 June 1964, 7729; Pont Casse, 
1.3 miles east, 10 May 1964, O. S. Flint, Jr., 19; Pont Casse, 1.6 miles west, 
9 May 1964, 19 ; same, but 27 June 1964, 29. Other: Pont Casse, .4 miles east, 
8 May 1964, O. S. Flint, Jr.,. many larvae, 7c 9 9 pupae; same, but 20 May 
1964, many larvae; same, but 12 June 1964, many larvae. 
Brotocy.—This species has the most unusual biology of any species 
of Trichoptera found on Dominica. The larvae and pupae are basically 
terrestrial, although they do not show any of the morphological adapta- 
tions that would be expected for this environment. The immature 
stages were found around a single small mountain stream that is 
incised into the rock to a depth of three feet. The larvae were actively 
crawling over the rock walls and boulders above the level of the 
water up to three or four feet away. The substrate was moist, and 
sometimes with a flowing film of water, but never were the larvae 
actually submerged. The habitat was on occasion so dry that I doubt 
very much if there could have been free water between the larva and 
its case. The pupae were tightly attached to rocks in the same habitat, 
generally in clusters and in some sort of protected niche. 
Sivin2 68 ——=-6 
