20 PROCEEDINGS OF THE NATIONAL MUSEUM VOL. 125 
and semimembranous; cercus developed dorsally into a long slender, 
mesally curving process that bears on outer surface near base a short 
tooth and ventrolaterally a long curving spine; mesoventrally devel- 
oped into an elongate quadrate plate; clasper with prominent dorsal 
arm, tip bifid; aedeagus semimembranous, with a heavily sclerotized 
dorsomesal rod. Female genitalia: lateral lobes of eighth sternum 
elongate and slender; dorsally with a transverse sclerite between ninth 
and tenth segments; bursa copulatrix with an elongate ventral plate 
and a ringlike sclerite between dorsolateral rods. 
Larva AND pupA.—Unknown. 
MarerraAL.—Holotype, male: Dominica, Pont Casse, 1.3 miles east, 18 May 
1964, O. S. Flint, Jr.. USNM Type 69885. Allotype, female: same data. Paratypes: 
same, but 10 May 1964, 19? ; Pont Casse, .4 miles east, 15 June 1964, O. S. Flint, 
Jr., 12; same, but 23 June 1964, 2 19; Brantridge, 30 April 1964, O. 8. Flint, 
Jr., 19 ; Cabrit Swamp, 23 Feb. 1965, W. W. Wirth, 17. 
Brotocy.—The adults have generally been taken near small streams 
at higher elevations on the island of Dominica. Presumably the larvae 
will be found in these streams. The one specimen from Cabrit Swamp 
probably represents an individual that wandered considerably from 
its breeding site. 
Cernotina cadeti, new species 
Figures 35-37 
As to be expected, this species is clearly related to the preceding. 
It may be recognized by the lack of external teeth, by the more sharply 
angulate ventral spine of the cerci, and by the more mesally displaced 
dorsal plate at the tip of the clasper. 
Apuut.—Length of forewing 3 mm. Color in alcohol, uniformly pale 
brown. Male genitalia: ninth segment considerably expanded baso- 
ventrally; tenth tergites conical, semimembranous; cercus developed 
into a long curving dorsal process and a ventrolateral spine whose tip 
is sharply angulate dorsomesad; mesoventral process elongate, rod- 
like; clasper with a dorsal arm; tip bifid, with dorsal plate displaced 
mesally; aedeagus semimembranous, with a long dorsomesal sclerite. 
Larva AND pupA.—Unknown. 
Marertau.—Holotype, male: St. Lucia, Vergallier River, near Marquis, 31 July 
1963, Flint and Cadet, USNM Type 69886. 
Brotogy.—The specimen was taken at a light near a slowly flowing 
stream about a yard wide, in which the larva probably developed. 
Genus Polyplectropus Ulmer 
Polyplectropus Ulmer, 1905, p. 103. [Type-species: Polyplectropus flavicornis 
Ulmer, 1905, by monotypy.] 
