56 PROCEEDINGS OF THE NATIONAL MUSEUM VOL. 125 
Brotocy.—The species has been taken on the island of Dominica 
only near a large lowland swamp with slowly flowing streams. It has 
been found, however, near fast waters on other islands. 
Oxyethira tega Flint 
Ficures 142-143, 145-146 
Oxyethira tega Flint, 1968a, p. 44. 
This species recently described from Jamaica is here recorded from 
Dominica. The species is easily distinguished from the preceding by 
the shape of the eighth segment, claspers, and aedeagus. 
Apvutt.—Length of forewing 2—2.5 mm. Color pale brown, with 
darker flecks. Male genitalia: eighth segment with a pair of flat 
dorsomesal lobes, and an erect dorsolateral lobe; anterior margin of 
ninth segment developed into a rounded lobe; claspers forming a 
ribbon-like band along ventral margin of ninth segment; subgenital 
plate developed into a triangular plate beneath aedeagus in ventral 
aspect, with lateral processes surrounding aedeagus, and developed 
into dorsal points; two pairs of membranous rods above clasper; 
aedeagus with apical half divided into 2 processes, 1 of which bears 
an internal tubule. Female genitalia: eighth sternum slightly bilobate; 
ninth sternum sclerotized laterally; bursa copulatrix shield shaped 
with a central opening, and a pair of apicolateral earlike flaps. 
LARVA, PUPA, CASE.— Unknown. 
Marerrau.—Dominica, Freshwater Lake, 21 Jan. 1965, W. W. Wirth, 1c; 
same, but 22 Feb. 1964, D. F. Bray, 5oc' 79; Sylvania, 23 Jan. 1965, W. W. 
Wirth, 3o° 39; Clarke Hall, 21-31 Jan. 1965, W. W. Wirth, 1; same, but 
1-10 Feb. 1965, 19 ; same, but 11-20 Feb. 1965, 2c° 49 ; same, but 21-28 Feb. 
1965, 1c’; same, but 1-10 March 1965, 1°; same, but 21-31 March 1965,29719 ; 
same, but 21-29 April 1964, O. S. Flint, Jr., 19; same, but 15-30 June 1964, 
49° 49; Mannett Gutter, 10 March 1965, W. W. Wirth, 19 ; Grand Bay, 13 
April 1964, O. S. Flint, Jr., 1o7; Fond Figures, 13 March 1965, W. W. Wirth, 
380° 29. 
Brotocy.—The adults have been taken at light both near the 
larger lowland rivers, and a highland lake. 
Genus Hydroptila Dalman 
Hydroptila Dalman, 1819, p. 125. [Type-species: Hydroptila tineoides Dalman, 
1819, by monotypy.] 
The genus Hydroptila has been found in all the faunal realms of 
the world. One or two species have been encountered on each of the 
Antillean islands that have been collected in depth. 
The immature stages have been described in detail by Nielsen 
(1948). They inhabit in the final instar a “purse-case” made of silk, 
often incorporating sand and plant matter. 
