Maddox, on Acari in a Nitrate Bath. 
99 
cyanide solution^ forced out larger ova or ovisacs through the 
same groove. The ova or ovisacs in some were eight in 
number; in others I could find only six. The males are 
rather smaller than the females, and have no projecting 
tubercle, groove, or pouch. In some I found a very 
Pemale. 
curious structure, visible only from the abdominal surface, 
but the exact plane of which, even by the most careful 
focussing, I could not decide on, as it was only seen when 
the two surfaces were closely pressed. It was oval in 
shape, with a slight projecting limb from the upper part of 
the oval on each side. In the centre of the ellipse was a 
well-defined line, and, abutting against this, on each side, 
short, slightly curved marks or lines, looking somewhat like 
the gizzard-teeth of some insects ; but whether it belonged 
to the digestive or genital system I could not satisfy myself. 
Many attempts were made by pressure, but yielded no good 
result, the whole breaking up into a sort of fatty sarcode. 
The outer surface of the skin is covered with minute granu- 
lations, which, seen edgeways, are resolved into very minute 
points — not cilia, being much shorter and stouter. The long 
curled hairs on the back, and the straight ones near the pos- 
terior end of the body, are finely barbed or feathered. The 
insects are provided with a pair of formidable, strong -looking 
mandibles, each composed of two claws with four or five irre- 
gular teeth, that interlock. The labia are notched at the end 
like a small reversed a set in a larger v {vide photograph 
No. 4) . The legs are furnished with sharp bristles, the ends 
of the foot padded, and on some of the feet I noticed a sort 
VOL. X. h 
