76 PROCEEDINGS OF THE NATIONAL MUSEUM VOL, 125 
P. pulchrus except for hook-plates, which generally bear one more 
hook per plate. 
Case.—Length 15-20 mm, width 7-9 mm. Constructed of nearly 
circular pieces of leaf or wood, placed in dorsal and ventral rows. 
MarterraL.—Holotype, male: Dominica, 1.6 miles west of Pont Casse, 9 May 
1964, O. S. Flint, Jr.,. USNM Type 69910. Allotype, female: same, but emerged 
6 May 1964. Paratypes: same, but 24 April 1964, 27; same, but 28 April 1964, 
2c 19; same, but emerged 2 May 1964, 1? ; same, but emerged 4 May 1964, 
10°; same, but emerged 6 May 1964, 19 ; same, but emerged 7 May 1964, 19; 
same, but 9 May 1964, 40’; same, but emerged 9 May 1964, 1c 19; same, 
but emerged 17 May 1964, 1c; same, but 16 June 1964, 2c? 29; same, but 
27 June 1964, 16; Pont Casse, .4 miles east, 6 May 1964, O. 8. Flint, Jr., 19; 
same, but 15 June 1964, 1c 19; Pont Casse, 1.3 miles east, 18 May 1964, O. S. 
Flint, Jr., 1c 19; Pont Casse, 3 miles east, 15 Oct. 1966, E. L. Todd, 10; 
Pont Casse, 2 miles northwest, 3 May 1965, D. R. Davis, 1c; Pont Casse, .5 
miles south, 22-24 July 1963, O. S. Flint, Jr., 3o° 29; same, but 8 April 1964, 
1o;same, but 11 April 1964, 1 9 ; Pont Casse, 12-14 Oct. 1964, P. J. Spangler, 19. 
Other: Pont Casse, 1.6 miles west, 24 April 1964, O. 8. Flint, Jr., many larvae, 
pupae, and metamorphotypes; same, but 29 April 1964, many larvae, pupae, and 
metamorphotypes; Pont Casse, 2.2 miles east, 15 June 1964, O. S. Flint, Jr., 
1 pupa; Pont Casse, .5 miles south, 22-24 July 1963, O. S. Flint, Jr., 2 larvae, 
2 pupae, 2 metamorphotypes; same, but 15 June 1964, 1 pupa; Brantridge, 
9 May 1964, O.S. Flint, Jr., 3 larvae; Espagnole River east of Syndicate Estate, 
cascades on Mt. Diablotin, sta. 41, 26 Jan. 1964, H. H. Hobbs, Jr., 1 metamor- 
photype; Pont Casse, 3 miles north, 6 Oct. 1964, P. J. Spangler, 1 larva; Pont 
Casse, 2 miles northwest, 5 Oct. 1964, P. J. Spangler, 2 larvae. 
BroLtocy.—This species appears to be another of the species that 
breeds in the small streams at higher elevations in the mountains of 
Dominica. The larvae are generally found in the organic matter in 
the larger pools although they may be found in the cascades as well. 
The pupae especially are found in the cascades, attached to the 
underside of some of the larger stones. 
Family HELICOPSYCHIDAE 
The family Helicopsychidae, which are known as the snail-case 
makers, are the most diverse in the tropics although a few species 
range well into the temperate regions. 
The snaillike cases constructed by the larvae are very distinctive. 
A number of these cases were described by the very early malacologists 
as Mollusca. They are found in flowing water, generally attached to 
large stones and boulders. 
Genus Helicopsyche Siebold 
Helicopsyche Siebold, 1856, p. 38. [Type-species: Helicopsyche shuttleworthi 
Siebold, 1856, designated by Flint, 1964b.] 
This genus, which is primarily tropical, is found over the whole 
world with the exception of the northwestern Paleartic Region. All 
