288 CLARENCE M. WEED. 



ments scarcely or not at all distinct (especially in the % ). Anterior 

 and lateral borders of the cephalothorax smooth. Eye eminence 

 relatively small ; smooth, or rarely provided with small, sligiitly dis- 

 tinct tubercles ; widely separated from the cephalic border. Lateral 

 pores small, oval and marginal. Anal piece large, transverse-oval 

 or semi-circular, much wider than long, and much wider than the 

 reflected borders of the eighth segment. Mandibles short, similar in 

 the two sexes ; first joint furnished at the base below with an acute 

 tooth. Palpi simple; femur, patella and tibia without any process 

 and without projecting angles ; n)axillary lobe provided at the base 

 with two strong, conical teeth. Maxillar}^ lobe of the second pair 

 of feet very long, nearly straight from the base, not attenuated, di- 

 rected mesad nearly horizontally, and united on the ventro-meson 

 to the lobe from the opposite side without forming a sensible angle ; 

 the two together lightly arched on the cephalic border, and forming 

 an even curve. Sternal piece large, slightly contracted between 

 the fourth pair of coxa, gradually enlarging and obtusely truncate 

 cephalad. Feet very long and slender ; tibia of the second pair 

 with a few false articulations. Palpal claw denticulate. 



The males of the four species so far found in South Dakota may be 

 determined by the following key : 



A distinct spur on femur of palpus calcar. 



No spur on palpus 1. 



1. — A distinct black dorsal stripe vittatiiiii. 



No distinct black dorsal stripe 2. 



2. — Dorsum light brown ; legs very long; no quadrangular reticulated patch 



on abdomen loiigipeiii al<lrielii. 



Dorsum mostly blackish ; legs moderately long; a quadrangular reticu- 

 lated patch on abdomen bivolor. 



Liiohiiiiiilll Tittatiiin niiiioi* new subspecies (Trans. Am. Ent. Soc. xix, 

 plate 12 i. 



Liobunum vittatum dorsatnm Weed, Am. Nat. xxvi, p. 786. 



Hale. — Body 6 mm. long ; 4 mm. wide ; palpi, 6 mm. long. Legs : first, 20 ram. ; 

 second, 37 mm. ; third, 21 mm. ; fourth, 30 mm. Femur of first leg 5 mm. ; dor- 

 sum granulate, in fully colored adults of a deep reddish brown color, with a very 

 distinct black stripe, which begins at the eye eminence expands for a short dis- 

 tance, then contracts until it reaches the cephalic portion of the abdomen, ■whence 

 it runs with parallel sides a short distance, then very slightly expands until it 

 reaches the caudil third of the abdomen, where it contracts and runs as a stripe 

 to the posterior extremity. Eye eminence of about equal height, length and 

 breadth, sloping slightly backward, black above, lightly canaliculate, with a few 

 (two to five or six) sub-obsolete, acute black tubercles; mandibles light brown, 

 tips of claws black; dorsal surface of second joint sparsely covered with short 



