16 PROCEEDINGS OF THE NATIONAL MUSEUM VOL. 125 
3. Head with dark muscle scars; anal claw with large ventral teeth. 
Polyplectropus 
Head uniformly pale; anal claw without ventral teeth... . . Cernotina 
PUPAE 
1. Tip of mandible hooked; apical process with 4 setae. . . . . Xiphocentron 
Tip of mandible not hooked; apical process with many setae. ..... 2 
2. Apical process with about 10 setae; gills absent. . . .. . . Cernotina 
Apical process with many more than 10 setae; gills present. . Polycentropus 
ADULTS 
1. Foreleg with preapical sputic 3.06: 0s as 6 
Foreleg without preapical spur. . . be a aol sce he 
2. Hindwing with Rz and R; fused to wing Sarin . .. . . . Polyplectropus 
Hindwing with R, separating from R3 before wing margin . . Polycentropus 
3. Anterior scutal warts of mesonotum delimited by a distinet lateral suture; 
general color black. .... ... . . Aiphocentron 
Anterior scutal warts without cree Sitpats es; eters color yellowish. 
Cernotina 
Genus Xiphocentron Brauer 
Xiphocentron Brauer, 1870, p. 66. [Type-species: Xiphocentron bilimeki Brauer, 
1870, by monotypy.] 
Species of the genus are found from southwestern United States 
south through South America. All the Antillean islands intensively 
collected for Trichoptera have proven to support one or two species. 
The immature stages were described by Edwards (1961) and Flint 
(1964b). The adults of the genus are generally diurnal and rarely 
attracted to lights, which accounts in part for their scarcity in col- 
lections. 
Key to Species 
ADULTS 
Color totally black. .... wee « te) oes OSC rm 
Color black, with a line of white meine alone he Tne ior osetia of the forewings. 
X. albolineatum 
Xiphocentron fuscum, new species 
Figures 27, 28 
The species seems to be closest to X. borinquensis Flint from Puerto 
Rico. From this it differs in the apically widened cerci, much shortened 
anterior process of the ninth sternum, and differently shaped mesal 
lobes of the ninth tergum. 
Apuut.—Length of forewing 3.4-4 mm. Color fuscus, coxae and 
femora pale brown, hairs on face ventrad of antennae pale brown. 
Apical spur of hindleg in male about 4% length of basal tarsal seg- 
ment. Male genitalia: ninth sternum with anterolateral process short 
and blunt, posterior margin truncate; ninth tergum rectangular in 
lateral aspect, posterior margin with a V-shaped mesal incision; tenth 
