Antemice. 
823 
hairs. On the ventral side is a single larger sensory bristle. 
The usual delicate sense bristles are situated on a slight tubercle 
on the outer side about the middle. The exterior, distal, one is 
the longer. From the extremity between the two branches, there 
arises a very long, delicate, sensory spine. It is smooth and 
bi-articulate, and extends somewhat beyond the two proximal 
joints of the dorsal branch. 
The two branches attached to the basal joint are of nearly 
equal length, slender and somewhat tapering. The dorsal 
branch is four-jointed, with setae on the terminal joint only 
The proximal joint is very short, about one-third the length of 
the other joints, which are nearly equal in length. It has no 
accessory spines, hairs or setae. The next joint is three times 
as long, bears a delicate spine on the dorsal side, but has 
neither hairs nor setae. The next joint is like the preceding 
but without the spine. The terminal joint is slightly longer 
■than the two preceding it. It' has one spine at the end, and 
three terminal setae. These setae are moderately long, as long 
or longer than the whole length of the antennae. They are 
■two-jointed, flexible and sparsely plumose. 
The ventral branch of the antenna is three-jointed. The 
proximal joint is smooth, bearing one very long seta, sd long 
■that it reaches beyond the tips of the terminal setae. There is 
:a marked projection of the joint at the place where the seta is 
articulated to it, but there are no spines. The seta is stiff at 
the middle joint, but is so long and slender as to be very flexi¬ 
ble. It is sometimes sparsely plumose and occasionally shows 
very fine spinules. The second joint of the branch is of about 
the same character as the proximal, but shorter. The seta is 
bi-articulate and plumose. The terminal joint bears three ter¬ 
minal setae, with the characteristics already described for the 
dorsal branch. 
The spines on both branches are very delicate, irregular and 
of little importance. There may be a fringe of hairs around 
each joint, but they are difficult to distinguish even with a 
high magnifying power, and appear much like the threads at¬ 
taching infusoria or filamentous plants. 
