92 Illinois State Lahoratorij of Natural History. 



brownish, perfectly smooth, not at all canaliculate, almost 

 hemispherical. Mandibles whitish, with the usual black tips 

 to the claws ; second article with sparse blackish hairs on 

 dorsal surface. Palpi rather slender, mottled, distally whitish; 

 furnished with short blackish hairs. Patella with its inner 

 distal lateral angle prolonged into a short apophysis, and 

 having a rather thin brush of hairs on its inner lateral surface. 

 Tarsal claw denticulate. Ventrum, including coxae, grayish 

 brown, cephalic portion -.vith short dark hairs. Trochanters 

 brownish black. Legs light brown, ringed with dark brown ; 

 furnished with very minute blackish spines. 



Described from many specimens collected in Champaign, 

 Effingham, and McLean counties. 



I refer this species to the genus Liobiinitin, for the present, 

 with considerable hesitancy, as it does not strictly belong there 

 on account of the projecting inner angle of the palpal patella. 

 Its life history also is different from that of any other mem- 

 ber of the family with which I am acquainted, as it lives over 

 winter as an adult instead of depositing eggs and dying in 

 autumn, as do the other species. I have collected it repeatedly 

 under boards in fields during the months of September, 

 October, November, -January, April, and May. 



Phalangium, Linn. 1758. 



Teguments soft or subcoriaceous. Stritc of the cephalo- 

 thorax, and of the three last abdominal segments very distinct, 

 those of the five cephalic segments only slightly so. Cephalic 

 border of the cephalothorax smooth; lateral border more or less 

 toothed; dorsum nearly always furnished with small teeth. 

 Dorsum of abdomen having transverse series of small teeth or 

 hairs. Eye eminence of medium size, canaliculate, provided 

 with two series of pointed tubercles, always separated from the 

 cephalic border by a space larger than its diameter. Lateral 

 pores large, elongate-oval, sab-marginal, visible from above. 

 Anal piece (juite suiall, wider than long, of the same width, or 

 scarcely narrower than the curved borders of the eighth seg- 

 ment. Mandibles short and simple in the female, often more 

 developed and provided with tubercles in the male; first article 

 unarmed below. Palpi simple, often having the inner distal 



