The Phalangihuf of Illinois. 91 



surface, and a short row of similar tubercles on the apical 

 portion of its inner ventro-lateral surface. Tarsal joint densely 

 clothed with long black hairs, with a thick row of short black 

 tubercles on its inner ventro-lateral surface, terminating in a 

 short denticulate claw. Ventrum light reddish-brown. Coxaj 

 reddish, with a few short hairs ; two anterior pairs with a row 

 of subobsolete tubercles on the cephalic border. Trochanters 

 light brown, darker dorsally. Remaining joints of legs light 

 brown with darker annuli ; femora, patellae, and tibiae, with 

 rows of short spines. Shaft of penis very robust, flattened, 

 distally contracted and curved, and terminating in a short, 

 acute point. 



Described from four specimens collected iu Champaign 

 Co., Ill, 23d June and 9th August, 1887, and at Cave-in- 

 Rock, Hardin Co., 111., 27th July, 1883. 



So far as I know, the female of this rare form has never 

 been taken. 



I refer this species, provisionally, to Liobii)n!)ii, although, 

 on account of the spur-like process on the femur of the palpus, 

 it does not strictly belong there. 



L. (?) formosum, (Wood). 



Fhalanffium formosum, Wood, 1. c, p. 30. 



$, ?. Body 4-6 mm. long, 2.5-3 mm. wide. Palpi 2.6 

 mm. long. Legs: I., 10 mm.; It., 22 mm.; III., 11 mm.; IV., 

 16 mm. 



Dorsum remarkably smooth, mot- 

 tled with gray and blackish brown ; 

 wide a dark brown or black central 

 marking commences on the cephalic 

 margin and rims to the middle of 

 the fifth abdominal segment, where 

 it abruptly terminates ; it is expanded 

 on the cephalothorax, contracted on 

 the first abdominal segment, and 



then again expanded. The entire liohinum (?) formosum 

 abdomen caudad of the middle of the fifth segment usually 

 much lighter than the part cephalad. There is a peculiar 

 oblique sinus caudad of each lateral pore. Eye eminence 



