22 
ATT l D/E OF THE EXITED STATES. 
IN8S 
XVII. Attus johnsonii, new. 
(Plate II, Figures 17 to 17a.) 
MALE- Length, 10 nun.; width of abdomen, 3.2 nun.: length of eeph.th., 5.1 mm.; width 
of ueph.th., 8.3 mm. 
Legs. 
Fen). 
Pat. 
Tib. 
Metat. 
Tar. 
Total 
1. 
2.J) 
2.1 
2.7 
1.8 
1.1 
10.6 
2. 
2.7 
1.7 
1.7 
1.5 
1. 
8.6 
3. 
2.7 
1.6 
1.6 
1.9 
1.1 
8.9 
*1. 
3.6 
1.8 
2.2 
2. 
1.3 
10.9 
The cephalothorax is moderately high ; the thoracic part is longer 
than the cephalic. In color it is jet black, with some long black hairs 
in the eye region. 
The quadrangle of the eyes is wider than long, and wider behind. 
The dorsal is as large as the lateral eye. and in a line with it. The 
small median eye is just above their upper borders, and is nearer the 
lateral eye. The anterior row of eyes is curved, a straight line from 
the top of the middle eyes cutting the lateral eyes above the centre. 
The lateral are half as large as the middle eyes, from which they are 
separated by nearly their diameter. The middle eyes are well sep- 
arated. The elypeus is one-half as wide as the middle eyes, vertical, 
dark brown, with a short fringe of white hairs at the edge. 
The palpus has the bulb greatly enlarged behind. The hook is 
small. 
The falces are stout, vertical, dark colored, but somewhat iridescent. 
The maxilla- are stout, thick, truncated, brown, with the inner edge 
which slopes to the lip, pale. The lip is half as long, rounded, brown. 
The sternum is black with white hairs. The anterior thighs are 
separated by the width of the lip at the base. 
The relative length of the legs is 4. 1, 3, ■>. The first pair is the 
stoutest. In color they are dark rufous, barred with black. The tibia 
and patella of tjie first leg are equal in length. There are femoral, 
tibial and metatarsal spines on the four pairs, those on the metatarsi 
of the fourth being found only at the extremity. 
The abdomen is bright red, with a tinge of yellow. The hairs are 
easily rubbed off, showing the integument to be jet, black. 
The venter is dark brown with white hairs. 
FEMALE Length. 8.5 mm. : width of abdomen, 3.3 mm.: length of ueph.th., 8.5 inm. ; 
width of ueph.th., 3.8 mm. 
The palpus is reddish, with white hairs. 
The relative length of the legs is 4, 1. 2, :S. The tibia of the first is 
longer than the patella. 
The abdomen has a whitish band at base, and a central longitudinal 
black band from the middle of the dorsum to the apex, in which are 
two opposed pairs of white dots. 
The epigynum presents a plate which is curved in front, and 
narrow behind, with a large opening at the posterior edge. 
