64 PROCEEDINGS OF THE NATIONAL MUSEUM VOL. 125 
tergum with a dark, trianguloid mark mesally. Male genitalia: 
ninth segment produced and rounded anteroventrally, with a dumbell- 
shaped dorsal lobe; apex of lightly sclerotized dorsal lobe with a 
V-shaped mesal excision; dorsolateral spine long, and slender; clasper, 
with broad, dorsal and ventral lobes; aedeagus with 2 subapical spines 
a central tubule, and enlarged base. 
LARVA, PUPA, CASE.— Unknown. 
MateErIAL.—Holotype, male: Dominica, Boiling Lake, 19 Nov. 1964, P. J. 
Spangler, USNM Type 69906. Paratype: Guadeloupe, altitude 3000 ft., 30 July, 
A. Busck, 1c. 
Briotocy.—The immature stages and breeding sites are unknown. 
Ochrotrichia (M.) exclamationis, new species 
Figures 178-181 
This species is not clearly related to any other in the subgenus. The 
long subapical spine of the aedeagus, the short clasper, and the pouches 
and hair tufts of the abdomen are all extremely distinctive. 
Apuutr.—Length of forewing 2 mm. Color fuscus, forewing irregu- 
larly mottled with silvery patches of hair. A pair of elongate internal 
tubes arising ventrally between fourth and fifth segments, extending 
the length of fifth segment; a pair of black, scale-filled sacs postero- 
ventrally on fourth segment; a pair of large, dorsal hair tufts basally 
on fourth segment. Male genitalia: ninth segment with anteroventral 
margin extended and rounded; dorsal lobe short, rounded, lightly 
sclerotized; dorsal lobe rounded, short, and indistinct; dorsolateral 
spine broad, curved ventrad; clasper short and broad, with a small 
mesal spine along posterior margin; aedeagus with a long ribbon-like 
subapical spine, a twisted, lightly sclerotized process on right, an 
internal tubule, and expanded base. 
LARVA, PUPA, CASE.— Unknown. 
MarrriAL.—Holotype, male: Dominica, Clarke Hall, cocoa trail, 16 Feb. 1965, 
W. W. Wirth, USNM Type 69907. 
BroLtogy.—The biology is totally unknown. 
Ochrotrichia (M.) species 1 
Ficures 182-183 
There are two females of the subgenus Metrichia in the collections. 
On the basis of coloration, they are probably not the female of 0. 
exclamationis, but there is no way to assign these to either O. campana 
or O. similis. 
Aputt.—Length of forewing 2-2.5 mm. Color black, antennae and 
legs paler. Female genitalia: eighth sternum with a thin apical collar 
