On South-American Monkeys, Bats, ée. 455 
green ; facial quadrangle a little longer than wide, the inner 
orbits convex ; labrum (except very narrow margin and two 
large spots at basal corners), clypeus (except very narrow 
anterior edge and a long black mark on each lateral margin), 
supraclypeal band, rose-thorn-shaped lateral face-marks, and 
broad stripe on scape, all very pale yellow; hair of head, 
thorax, legs, and first two abdominal segments abundant, 
long, erect, and white, with no black hairs intermixed ; flagel- 
lum entirely black ; third antennal joint long and narrow, 
suddenly enlarging, trumpet-like, at the apex; thorax dull, 
densely rugoso-punctate; tegule black. Wings clear,nervures 
black or almost so. Legs black, even to the tarsi; hair on 
inner side of tarsi shining coppery red when seen in the 
proper light; middle tarsi long and slender, twice as long as 
their tibize, but not otherwise peculiar; spurs very long; 
basal joint of hind tarsi with a prominent oblique tooth on the 
anterior margin; abdominal segments 3 to 5 with erect black 
hair, and some light hairs intermixed ; sixth with light hair, 
not conspicuous ; no hair-bands ; apical dorsal segment with 
short appressed silvery hair, narrowly truncate, with lateral 
margins showing a strong double curve; claspers very large, 
deeply bifid or bidentate, the posterior margin obtusely 
angled, the base of each posterior tooth emitting a long ecylin- 
drical light brown fleshy organ, beset with short hairs; 
ventral surface of abdomen with long white hair. 
Hab, Las Vegas, N. M., May 7, 1903 (Anna Gohrman). 
Flying around Ribes longiflorum (along with A. Portere), 
but the tongue seems too short to suck from that flower. 
It is allied to A, Hdwardsiz, Cresson. 
XLIV.— Notes on South-American Monkeys, Bats, Carnivores, 
and Rodents, with Descriptions of new Species. By 
OLDFIELD 'THOMAS. 
The Generic Names Callithrix and Hapale. 
TuE common laxity about nomenclature is nowhere more 
striking than among the Primates, and an instance of this 
occurs in connexion with the genera of Cebide usually termed 
Oallithriv and Hapale, the Titi Monkeys and Marmosets. 
Fine paper as it was, Geoffroy’s 1812 cer ae of the 
