160 Proceedings of the Biological Society of Washington. 



Geodrassus auriculoides (Barrows). 



Drassodes auriculoides Barrows, Ohio Jour. Sci., 1919, 19, p. 355, pi. 16, 

 f . 4a-4b. 



Holotype.— Coll Ohio State Univ., ( 9 )• 



Distribution. — Ohio: Rockbridge (type loc); Michigan; New York. 



SosTicus, gen. nov. 



In general structure near Drassodes but readily separable in the different 

 armature of the chelicera. Males not known. Epigyna elongate and with 

 a prominent median process projecting caudad in the depression. 



Genotype. — S. continentalis, sp. nov. 



Sosticus continentalis, sp. nov. 



Female. — Carapace and legs in tjrpe as preserved nearly chestnut, the 

 femora, patellae and tibiae more dusky. Abdomen grey. In structure 

 distinguishable from S. insularis in having the anterior median eyes smaller 

 than the laterals, in having tib. + pat. IV longer than the cephalo thorax 

 instead of only equal to it, in having a series of five median dorsal spines 

 on tibia IV instead of only two, and in the better development of the distal 

 tooth of the lower margin of furrow of chelicera. 



Length, 8.5 mm.; cephalothorax, 3.54 mm.; tib. + pat. IV, 4 mm. 



Holotype.— U. C. Z. 659 ( 9 )• 



Locality. — Iowa: Dallas Co. 



Sosticus insularis (Banks). 

 Herpyllus insularis Banks, Jour. N. Y. Ent. Soc, 1895, 3, p. 78. 



Holot-ype.—M. C. Z. 660 ( 9 )• 

 Locality.— N. Y.: Sea Cliff. 



Rachodrassus, gen. nov. 



In this genus the eye rows are unusually close together, the posterior 

 one straight. Area of median eyes wider behind than in front. Anterior 

 median eye much smaller than the laterals. Apophyses of bulb of palpus 

 of male strongly developed. 



Genotype. — R. echinus, sp. nov. 



Rachodrassus echinus, sp. nov. 



Male. — Carapace and femora of legs cloudy yellow, the sternum and dis- 

 tal joints of legs clearer yellow. Abdomen yellowish, with a spear-mark at 

 base and a number of obscure, broken chevron marks behind. Met. I and 

 II with two pairs of spines. Tib. I and II with three pairs of ventral spines. 

 Ectal apophysis of bulb of palpus with a retrorse prong; tibial apophysis 

 much shorter than tibia, distally acute. 



Length, 5 mm.; cephalothorax, 2.62 mm.; tib. + pat. IV, 3 mm. 



Length of 9 , 7.25 mm.; cephalothorax, 2.83 mm.; tib. -f- pat. IV, 3.2 mm. 



Holotype.— M. C. Z. 613 (c^). Allotype.— M. C. Z. 614 ( 9 ). 



Locality. — Ky.: near Mammoth Cave. 



