NO. 3665 CADDISFLIES—FLINT 69 
Biotocy.—The larvae were found in pools and other slowly flowing 
sections of two small mountain streams. On occasion they were found 
to be abundant, crawling over rocks and leaves in a favored site. 
Genus Brachysetodes Schmid 
Brachysetodes Schmid, 1955, p. 134. [Type-species: Brachysetodes trifida Schmid, 
1955, by original designation. | 
I am placing with some hesitation the following species in the 
Chilean genus Brachysetodes. Although venation is the same in the 
Dominican species and the type-species, the plan of the male genitalia 
seems quite different. Perhaps the immature stages of the Chilean 
species when they are discovered will show that the Dominican species 
is not congeneric. 
The larvae are quite similar to those of Leptocella in many charac- 
teristics; however, the brushes of hair and spines on the ventral portion 
of the anal prolegs are unique. 
Brachysetodes insularis, new species 
Figures 189-192, 202-208 
This species seems to be closest to B. bifida Schmid, from which it 
differs in the round cerci and in the shorter clasper with a differ- 
ently shaped appendage. 
Aputt.—Lengths of forewing 4-5 mm. Color brown, forewing 
golden, with interspersed brown spots roughly arranged in transverse 
rows. Male with 2 branches of M in forewing, female with 3 branches. 
Male genitalia: cercus almost spherical, with a small apicoventral 
point, cerci broadly united dorsomesally; tenth tergum elongate, with 
thin lateral expansion; clasper terete, nearly upright, apex with a 
cluster of setae, posterior face with a hooked process; aedeagus tubular, 
with an apicoventral liplike expansion. Female genitalia: cerci well 
developed, united ventromesally by a semicircular plate; bursa 
copulatrix with apical supports, and central keyhole-like opening. 
Larva.—Length to 6 mm. Sclerites pale yellow brown. Mandibles 
with 3 apical teeth; maxillary palpi short. Pronotum with many 
setae on anterior half, anterolateral angles set off by sutures. Metano- 
tum with a group of setae anterolaterally; sternum with a transverse 
row of about 20 setae. Spacing humps present, lateral ones poorly 
developed. A few single gill filaments on basal abdominal segments. 
Ninth tergum with 3 pairs of long setae. Mesal portion of anal prolegs 
with a linear brush of hairs margined laterally by spinelike setae, 
another row of spines mesad of claw. 
