28 PROCEEDINGS OF THE NATIONAL MUSEUM VOL. 125 
Biotocy.—The species is most abundant around the small, tum- 
bling mountain brooks; however, the collection of larvae in the Roseau 
River suggests that they breed sparingly in the large lowland rivers 
as well. 
Smicridea simmonsi, new species 
Figures 57-60 
This species appears to be most closely related on the basis of male 
genitalia to S. grenadensis, although in coloration it is apparently 
the same as S. cariba. From S. grenadensis it may be separated by 
the more evenly rounded apices of the tenth tergites, by the straight 
lateral process of the aedeagus, and by the very long apical segment 
of the clasper, 
Aputt.—Length of body 4.5 mm, forewing probably about 5 mm. 
Wing dark with a transverse white band at region of anastamosis, 
apparently some white obliquely along the base of Cu. Sixth and 
seventh abdominal segments of male with internal reticulate sacs. 
Male genitalia: ninth segment with a pronounced dorsolateral angle; 
tenth tergite short, broad, apex rounded; basal segment of clasper 
short, apical segment subequal in length; aedeagus with well-developed 
ventral scoop, lateral spine straight, no lateral plate, dorsal hood 
semimembranous, membranous portion with about 6 pairs of long 
spines, apex with a crenulate crecentic hood above an elongate 
U-shaped sclerite. 
Larva.—Length to 7 mm. No differences found from the larva 
of cariba. 
Pupa.—Length 4.5 mm. As in S. cariba, except hook-plate 3P 
almost twice as wide as long and with 5 hooks. 
Marteriau.—Holotype, pharate male: St. Lucia, Vergallier River, near Marquis, 
31 July 1963, Flint and Cadet, USNM Type 69889. Other: same data, 22 larvae, 
1 pupa; Grand Riviere du Mabouya, 29 July 1963, Flint and Cadet, 1 larva; 
Cul de Sac River at mile post 9, 29 July 1963, Flint and Cadet, 2 larvae, 1 pre- 
pupa, 1 pupa; R. Galet, south of Dennery, 1 Aug. 1963, Flint and Cadet, 32 
larvae, 1 prepupa, 3 pupae. 
Brotocy.—The larvae of this species are most abundant in the 
small clear streams on the island of St. Lucia, but they are also 
found in the larger rivers in smaller numbers. 
Smicridea grenadensis, new species 
Fiaures 61-65 
This species, known only from Grenada, is most closely related 
to S. simmonsi of St. Lucia; however, it is nearly unicolorous, and 
and in the male the tenth tergite bears a distinct anteapical bulge, 
