NO. 3665 CADDISFLIES—FLINT 39 
Apvutr.—Length of forewing 3 mm. General color fuscus, with bright 
green linear marks on forewings, tegulae, and head; antennae alter- 
nating black and white. Male genitalia: eighth sternum produced 
into an acute angle laterally, broadly U-shaped ventrally; ninth seg- 
ment oblique, open anteroventrally, with a row of stout setae along 
posterior margin; claspers fused mesally, elongate, with a subapical 
seta dorsally, dorsally with a pointed mesal structure, partially 
enclosed by claspers that articulate basally with a linear lateral 
sclerite; tenth tergite strongly sclerotized, produced into a ventro- 
lateral point; aedeagus with a pair of small apicolateral rods, a 
central dome with basolateral rods, and a basal loop. Female geni- 
talia: eighth and ninth segments with anterolateral rods, posterior 
margin of eighth segment with a row of large setae; bursa copulatrix 
without an apical complex of supporting sclerites, but with a large 
complex basal group. 
Larva.— Unknown (from Grenada). 
Pupa.—Length 2.5 mm. Mandibles sickle shaped, inner surface 
smooth. Hook-plates present anteriorly on segments 3-7, posteriorly 
on 3-5, each with many small hooks. 
Casr.—Length 4 mm, width 2 mm. Silken, oval, domed, attached 
to substrate. Pupal case with a tight inner cocoon. 
MatreriAu.— Grenada, Beausejour River, 2 miles west of Grand Etang, 4-8 
Aug. 1963, O. S. Flint, Jr..many 7 &@ 2? 9, o& 2 metamorphotypes. 
Brotogy.—The pupae were taken on rocks in a cascade of a small 
mountain brook several feet wide by a few inches deep. The adults 
were attracted to a blacklight placed nearby. 
Genus Alisotrichia Flint 
Alisotrichia Flint, 1964b, p. 46. [Type-species: Alisotrichia hirudopsis Flint, 
1964b, by original designation.] 
Known from Puerto Rico and Jamaica previously, five species are 
assigned to the genus from Dominica. The typical males have enlarged 
basal antenal segments that cover the face, only two ocelli, and a spur 
count of 0, 2, 4. In addition to two species belonging to this typical 
group, I am assigning three species to this genus that belong to a 
rather different group. The males of this second group have unmodified 
antennal segments, three ocelli, and a spur count of 0, 3, 4. The thoracic 
structure is very similar in the two groups, however, and both have 
extremely modified genitalia. The female seventh tergum in this 
second group bears two straplike sclerites, rather than a single tri- 
angular one, but both have a simple ringlike bursa copulatrix. The 
larvae assumed to belong to this second group are very similar to the 
typical ones but also show several differences. Pending a total review 
