512 BULLETIN UNITED STATES GEOLOGICAL SUKVEY. 



Of this species, the collection ouly includes two (completely bare- 

 rubbed) female examples, one from Idaho, captured Julj^ 5, the other 

 from Mauitou, Williams' Canon, Colo., captured July 17. 



24. L. indagatrix n. 



CheplialoiJiorax black, with a rather broad yellowish-brown middle 

 band on the pars thoracica and a supramarginal row of about three yel- 

 lowish brown spots on each side; legs yellowish-brown, with black 

 rings, the thighs black with yellowish-brown spots; third pair of legs 

 evidently longer than second, fourth pair not four times as long as 

 cephalothorax; abdomen blackish above and on the sides, brownish 

 beneath ; vulva dark brown, consisting of a deep, flask-like, sharp-edged 

 depression, narrow in front, with the posterior, broader and longer part 

 rounded in the sides; along its whole length, the vulva is divided into 

 two large, long fovese (open behind) by means of a narrow septum, which 

 in front has the form of a fine costa, but then becomes broader, with 

 almost parallel sides, and with a longitudinal furrow. — 5 ad. . Length 

 about 8 millim. 



Female. — CeplialotJiorax rather broad, strongly rounded at the sides, 

 shorter than patella + tibia of the fourth pair, longer than these joints of 

 the first pair, its breadth equaling the length of patella -\- tibia of the third 

 pair; seen in i^rofile, the back, between the posterior declivity and the 

 eyes, is evidently depressed toward the middle, slightly convex behind 

 this depression, straight in front of it ; the area of the posterior eyes is 

 slightly sloping, the sides of the pars cephalica are nearly periiendicular. 

 The first row of eyes is very slightly curved downward, its eyes of 

 nearly equal size ; the central ones are separated from each other by 

 an interval as great as their diameter, and greater than the interval 

 between them and the laterals. The area occupied by the four posterior 

 eyes is much broader behind than in front, a little longer than broad 

 in front ; the interval between the largest eyes is a little greater than 

 their diameter; that between them and the hindmost eyes scarcely 

 double as great as the diameter of these latter eyes. The mandibles are 

 about 2 J times as long as broad at the base; the claw-furrow has three 

 strong teeth in the posterior and two teeth in the anterior margin 

 The legs are rather short, the first pair but little longer than the third, 

 which are slightly, but evidently longer than the second pair ; the 

 length of the fourth pair is not 4 times as great as that of the cephalo- 

 thorax. The anterior tibiae have 2. 2. 2. spines below, the first pair 

 also 1., the second 1. 1. in front. The aMomen is inversely ovate; the 

 area vulvte is large and corneous, somewhat triangular ; the vulva 

 forms a deep, flask-like depression, bounded by sharp margins ; these 

 margins, however, beiug behind incrassated into two large, low tuber- 

 cles; in front, the vulva is narrow, then equably and rather strongly 

 dilated, and at last narrowed again, the anterior part being gradually 

 and slightly dilated backward, also slightly dilated at the vey apex, 



