30 PEGKHAM. [Vol. 3. 



light-colored iridescent scales, as in exlensus and flavens. On 

 the back are two pairs of dark dots. 



We have a single male from Panama, sent to us by Count 

 Keyserling. 



HELORUS EXTENSUS, SP. NOV. 



Plate II, figs., 2-2b. 



S . Length, 8.4. Length of cephalothorax, 3.5 ; width of 

 cephalothorax, 3. A smaller male is only 6 mm. 

 long. 

 Legs, 1342 ; the first pair plainly longest and a little 

 stoutest. The coxse and trochanters are somewhat 

 elongated, so as to be visible from above. 



The cephalothorax has a very round look. The sides are 

 rounded out from above, below, so that the third row of eyes is 

 a little narrower than the cephalothorax at that place. The 

 cephalic part is plainly wider than the thoracic, the widest 

 point being at the dorsal eyes. It is inclined forward and is 

 very convex, while the thoracic falls in a steep flat slope from 

 the dorsal eyes to the posterior margin. The quadrangle of 

 the eyes is one-fourth wider than long and occupies about three- 

 fifths of the cephalothorax. The lateral eyes of the first row 

 are plainly more than half as large as the middle eyes and are 

 a little separated from them. This row is a little curved up- 

 ward. The dorsal eyes are large, equalling the lateral in size. 

 The clypeus is one-third as high as the middle eyes. The 

 falces vary considerably in length in different individuals. 

 They have a vertical part near the head, and then stretch out 

 horizontally, bearing a long fang. At the lower edge of the 

 vertical part are some small teeth. The horizontal part has, 

 underneath, a small tooth in the first third and a larger one 

 near the end. The palpus has the tarsus only half as long as 

 the patella and tibia together, and has a curious, elbow-like 

 bend in the femur. The whole palpus is very long. The 

 cephalothorax and abdomen do not come together, the pedicle 

 which joins them being visible from above. 



