1908.] NATURAL SCIENCES OF PHILADELPHIA. 167 



a fine serrulate line or serrula ; siipero-internal border with a dense pilose 

 band or scopula. 



Sternum longer than wide; large, subcordiform, being truncated in 

 front, rounded at the sides and attenuate to a point caudally. 



Legs long or moderately long, the fourth longest, then the first, the 

 third shortest in the great majority of cases ; but there are exceptions in 

 which the third legs are longer than the second, and others in which the 

 second are longer than the first. The femora, tibiae and metatarsi and 

 usually also some or all of the patellae armed Avith spines ; the anterior 

 tibise with three pairs of spines beneath, less commonly with two 

 (Pirata), and sometimes with as many as five (SosUaus); these and 

 other spines of the anterior legs often much reduced and sometimes 

 absent. 



In some small species the tarsi are beneath, all simply and rather 

 sparsely setose, but in most they are at least in part more or less 

 provided with scopula composed uniformly of fine, flat lanceolate 

 and slenderh^ pointed hairs, never of distally enlarged hairs; in the 

 smaller species these scopulsB may be present only along the sides of the 

 ventral faces of the anterior tarsi ; but in the larger species {Sosippus 

 and most Lycosas) the entire ventral surface of the anterior tarsi is 

 densely scopulate, and the metatarsi are usually similarly or less 

 densely scopulate, and the tibiae are also sometimes scopulate distally; 

 in these larger forms the posterior tarsi are scopulate, but have their 

 scopulae divided by a median line or band of setae; never with dense 

 fasciculae at base of claws. Tarsi bearing three claws, of which the 

 superior are strong and broad basally, and bear a series of teeth from 

 five to seven, rarely more, in mmiber, these being mostly confined to 

 the basal half of the claws; the unpaired claw small, bent abruptly 

 downward, almost always naked, rarely with a single tooth. Trochan- 

 ters invariably notched or excavated at distal end beneath. 



Superior lorum of the pedicel of the abdomen composed of two prin- 

 cipal, very unequal pieces, of which the smaller posterior one is trun- 

 cated or somewhat concave behind, and in front is notched or exca- 

 vated for the reception of the angularly or roundly attenuated posterior 

 part of the longer anterior piece; at each side of the principal plates is 

 a slender, anteriorly attenuated piece. 



Spinnerets six in number; the anterior ones short and relatively 

 stout, contiguous or subcontiguous ; the posterior more or less sepa- 

 rated from each other, mostly more slender than the anterior and either 

 of the same length or longer, composed of two articles, of which the 

 second is short and rounded and usually subject to retraction within 



