82 Illinois State Labomtonj of Natural History. 



without any process and without projecting angles ; maxillary 

 lobe provided at the base with two strong, conical teeth. Max- 

 illary lobe of the second pair of feet very long, nearly straight 

 from the base, not attenuated, directed mesad nearly horizon- 

 tally, 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 coxte, 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 following synopsis will aid in distinguishing our Illi- 

 nois species! 



1. L. dorsatum. Dorsum grayish or reddish brown, with 

 distinct central dark marking. Palpi long, reddish brown. 

 Body of S 5 mm. long; second legs 50 mm. Northward. 



2. L. viitatum. Much like dorsatum., but body is larger 

 and legs are much longer. Body of (? 7 mm. long; second legs 

 eO mm. 



3. L. nigropalpi. Dorsum reddish brown, with central 

 marking subobsolete. Middle joints of palpi blackish. Body 

 small; legs very long. Body of S 4 mm. long; second legs 

 100 mm. 



4. L. verrucosum. Dorsum reddish, with subobsolete 

 central marking. Palpi brownish white. Body large, with legs 

 comparatively short and thick. Body of I, G.5 mm. long; sec- 

 ond legs 50 mm. 



5. L. elcc/aiis. Dorsum blackish on margins, brownish in 

 middle, with a faint indication of a central marking, l^alpi 

 light brown. Very small, with long, slender legs. Body of $ 

 3.2 mm. long; second legs 3Smm. 



6. L. politus. Dorsum and trochanters clear reddish 

 brown, with scarcely an indication of a central niai-king. Body 

 of <l 5 mm. long; second legs 51 mm. 



7. L. {':') calcar. Dorsum reddish brown, with faint cen- 

 tral marking. Femur of palpus, with a robust spur-like pro- 

 cess on its outer ventro-lateral surface. Body of / 7.5 ram. 

 long; second legs 40 mm. 



