18 PROCEEDINGS OF THE NATIONAL MUSEUM VOL. 125 
tergum sclerotized laterally, tip decurved; cercus about 10 times as 
long as broad, widened subapicaily; clasper with apical portion 
narrow and sharply curved dorsomesally, mesally with many dark 
spicules; aedeagus very long, slightly enlarged apically. Female 
genitalia: eighth segment divided dorsally with long anterolateral 
processes; ninth segment long and slender with long anterolateral 
processes; apex of tenth segment with a pair of slender papillae. 
LARVA AND PUPA.—See Xiphocentron species. 
MateEr1aL.—Holotype, male: Dominica, Brantridge, 9 May 1964, O.S. Flint, 
Jr., USNM type 69883. Allotype, female: same data. Paratypes: same data, 507; 
same, but 30 April 1964, 1267; Pont Casse, .4 miles east, 7-8 May 1964, O. 8. 
Flint, Jr., 197; Pont Casse, 2.5 miles east, 16 Jan. 1965, W. W. Wirth, 10; 
Pont Casse, 1.5 miles north, 12 Feb. 1965, W. W. Wirth, 1c. 
Brotoagy.—Apparently this species is limited to the higher eleva- 
tions on the island of Dominica. I have swept them in numbers from 
rocks in nearly dry streambeds around Pont Casse. 
Xiphocentron albolineatum, new species 
FIGURES 29, 30 
This is a species closely related to the preceding, from which it 
differs in possessing a line of white hairs along the posterior margin 
of the forewings and mesally on the head. The male genitalia differ 
most noticeably in the narrower clasper and the more elongate dorso- 
mesal lobes of the ninth tergum. 
Apuut.—Length of forewing 3-4 mm. Color fuscus, coxae and 
femora slightly paler, posterior margin of forewing, pro- and mesonota, 
and head mesally with a band of whitish hairs. Apical spur of hind 
tibia of male about 1 as long as basal tarsal segment. Male genitalia: 
ninth sternum with anterolateral process long and attenuate; ninth 
tergum rounded basally, with dorsomesal lobes slightly elongate; 
tenth tergum with tip sharply decurved; cercus slender, narrowing 
apically, about 12 times as long as broad; apex of clasper slender, 
sharply curved dorsomesad, mesal surface with elongate spiculate 
patch. Female genitalia: identical to that of preceding species. 
LARVA AND PUPA.—See Xiphocentron species. 
Mater1aL.—Holotype, male: Dominica, Pont Casse, 1.7 miles east, 12 March 
1965, W. W. Wirth, USNM type 69884. Allotype, female: near Clarke Hall, 
13 Feb. 1964, D. F. Bray. Paratypes: Pont Casse, 12 Oct. 1964, P. J. Spangler, 
19; Mannett Gutter, 7 March 1965, W. W. Wirth, 19. 
Brotoay.—This species is known only from Dominica but appears 
to be more widespread on the island than the preceding. It undoubtedly 
has a slightly different habitat preference, which unfortunately is 
unknown. 
