78 PROCEEDINGS OF THE NATIONAL MUSEUM VOL. 125 
5; anterior plates with 2 obliquely placed hooks on each, posterior 
plate with large lateral and a small mesal hook. Apical process short 
and rodlike, each with 4 long setae. 
Casre.—Diameter 3-4 mm, height 1.5-2 mm. Made of sand grains 
in a rather flattened spiral. About 2% whorls; umbilicus widely open. 
Anal aperture slightly eccentric and often projecting slightly. 
MatrerIAL.—Holotype, male: Dominica, Pont Casse, .5 miles south, 22-24 July 
1963, O. 8. Flint, Jr., USNM Type 69911. Allotype, female: same data. Paratypes: 
Pont Casse, 1.6 miles west, 28 April 1964, O. S. Flint, Jr., 19 ; same, but 9 May | 
1964, 19% 29 ; same, but 27 June 1964, 19 ; Pt. Lolo, .5 miles west, 1600’, 19 Feb. | 
1965, J. F. G. and T. M. Clarke, 107%; Pont Casse, .4 miles east, 21 April 1964, | 
O. S. Flint, Jr., 1c’; same, but 27 April 1964, 19 ; same, but 6 May 1964, 19 ;) 
same, but 15 June 1964, 1c7; same, but 23 June 1964, 1c 19; Pont Casse, | 
.5 miles east, 1800’, 27 Jan. 1965, J. F. G. and T. M. Clarke, 1 19; Pont 
Casse, 1 mile east, 1600’, 29 Jan. 1965, J. F. G. and T. M. Clarke, 19; Pont 
Casse, 1.3 miles east, 10 May 1964, O. S. Flint, Jr., 20’; same, but 18 May 1964, 
1; same, but 26 May 1964, 1¢7 19; Pont Casse, 1.7 miles east, 24 March 
1965, W. W. Wirth, 3c 2? ; Pont Casse, 2 miles east, 1500’, 20 Feb. 1965, J. F. G. 
and T. M. Clarke, 19; Pont Casse, 13 Jan. 1965, J. F. G. and T. M. Clarke, 
1o;same, but 23 Nov. 1964, P. J. Spangler, 1’; Freshwater Lake, 5-8 Nov. 1966, 
A. B. Gurney, 1?. Other: Pont Casse, .4 miles east, 8 May 1964, O. 8S. Flint, Jr., 
11 larvae; same, but 20 May 1964, 10 larvae, 10 pupae; same, but 12 June 1964, 
7 larvae, 6 pupae; same, but 25 June 1964, 10 larvae, 2 pupae; Pont Casse, .5 
miles south, 22-24 July 1963, O. 8S. Flint, Jr., 1 prepupa, 2 cases; Pont Casse, 
1.6 miles west, 24 April 1964, O. S. Flint, Jr., 14 larvae. 
BroLtogy.—This species appears to be limited to the small mountain 
brooks, where on occasion it is quite plentiful. The larval population 
found in the brook at .4 miles east of Pont Casse has pale bladelike 
setae along the entire anterior margin of the pronotum, whereas the 
larvae from the other two brooks lack these setae except laterally. 
I am unable to find other differences between these populations, and 
so I am considering them to be all the same species. 
Helicopsyche species 1 
FigurE 230 
I have one female that appears to be a different species from the 
one above; however, I prefer to leave it unnamed until more examples 
are found. 
The specimen differs most noticeably in lacking the cuplike pockets 
anterolaterally on the subgenital plate. 
Avuit.—Length of forewing 5 mm. Color brown. Female genitalia: 
subgenital plate conical, lacking anterolateral modifications; cercus 
short, ventral plate rounded; bursa copulatrix with a pair of broad 
posterior supports, and an A-shaped central structure. 
Mareriau.—Dominica, Clarke Hall, 21-31 Jan. 1965, W. W. Wirth, 19. 
