° MALLOPHAGA FROM BIRDS OF FORMOSA. 187 
bounding the antennal region pitchy inward, fading into brown outwardly ; 
occipital margin edged with pitchy brown; two small triangular, brownish 
spots on the lateral margin of the front, outside of mandibles, which latter 
are pitchy brown, visible through the head. 
Prothorax almost hexagonal in shape, with lateral angles much extended, 
bearing two spines and a short hair; posterior lateral margins slightly convex 
and bare; posterior margin convex, with three hairs on each side; transverse 
chitin bar clear, distinct ; longitudinal bars brownish. Metathorax long, with 
slight lateral emarginations; indistinct sutural line separating mesothorax ; 
lateral margins bare, strongly diverging posteriorly ; posterior angles bearing 
three spines; posterior margine convex, furnished on each lateral part, a third 
of the whole in length, with a submarginal series of six or seven unequal 
hairs. Legs almost concolourous with thorax. 
Abdomen broadly elliptical; widening posteriorly to the segment IT, 
then tapering gradually to the end; lateral margins of segments almost equal 
in length, except three segments, one, two and nine, which are longer ; 
posterior angles projecting, bearing three spines and a long hair on segments 
I-VI; three spines and two long hairs on segment vir and a spine and 
three long hairs on segment vii; the last segment strongly rounded, with 
two long and two short hairs on each side and a fringe of fine hairs on the 
posterior margin. Posterior border of the first segment convex; of the 
second segment deeply concave; of third and fourth segments weakly con- 
cave and of the remaining segments almost truncate; posterior margin of 
the dorsal surface of each abdominal segment with a row of hairs of different 
length, interrupted at middle. Ground colour of abdomen paler than head 
and thorax ; broad smoky brown lateral bands with the distinct sutures, ending 
at the eighth segment; no transverse bands on dorsal surface, but those of - 
ventral surface showing through; ventral transverse bands of segments I-11 
indistinct ; those of segments vit and IX continuous, forming a blotch. 
Gen. LEMOBOTHRIUM Nitzsch. 
21. Leemobothrium loomisi Kellogg & Chapman. 
Kellogg and Chapman, Journ. New York Ent. Soc. x, 1902, p. 23, pl. 
im, fig. 3. 5 
