VOL. XV 



'•] PROCEEDINGS OF THE NATIONAL MUSEUM. 549 



Dorsum smootli, finely gTamilate; cloar reddish Ijrowu, witli no 

 niarkinji's, except occasionally a faint indication (shown by a sli<ihtly 

 darker shade) of the usual central dark niarkinj*-. Eye eminence rather 

 ])roniinent, slightly constricted at base, black above, canaliculate, with 

 a regular curved series of small, acute, l)lack spines over each eye. 

 Mandibles whitish, tips of claws black. l*alpi slender, light brown, 

 Avith femur and jjatella dusky ; finely pubescent, with a subobsolete 

 row of minute dark tubercles on the inner ventrolateral surface of 

 femur, and another row on the inner ventrolateral surface of tarsus; 

 joints slightly arched. Ventrum with coxae, including the membranous 

 distal lateral tips, and generally the trochanters, vermilion red. Legs 

 with proximal portions light-brown ;distally dark brown or blackish. 

 Shaft of genital organ nearly straight, slender, flattened, canali(!ulate; 

 distal portion very slightly expanded, then slightly contracted, and 

 again exi^anded into a half spoon shaped portion, and terminating in a 

 vsmall acute point. 



Female. — Differs from the male in having a larger, rounder body, 

 and in the color of the dorsum, which is brown, with a rather distinct, 

 darker central marking, and numerous whitish spots arranged more or 

 less transversely. In. some specimens the central marking is subobso- 

 lete. Apical rings of ovipositor white. 



Specimens of this handsome and abundant species have been taken 

 in the following counties of Ohio, on the dates given: Champaign, 

 August IS, 1800; Clermont, August, 1890; Delaware, September 18, 

 1800; Franklin, July 0, 1880; July 7, 8, 0, 10, 27, 31; August «, Sep- 

 tember li, 5, (5, 0, 1800; Lawrence, September 5, (I, 1800; Madison, July 

 10, 1800; Scioto, Septembr 3, 1890; Warren, July 5, August 14, 1(1, 1800. 



"This harvest spider is an out-door si)ecies, occurring abundantly in 

 fields and woods, although seldom found about barns and outhouses. 

 During the past summer (1800) I have taken great numbers in Frank- 

 lin County, Ohio, iu the grass along the banks of a small creek, 

 and among the driftwood left by the overflowing of the Olentangy 

 Eiver. The species becomes fully developed eairly in July, and the 

 males and females are about equally abundant. Both sexes Avhen dis- 

 turbed emit from the coxal region a liipiid having a peculiarly sharp, 

 l)ungent odor. 



"I placed a number of these harvest si)iders in a large glass viva- 

 rium July 10, 1800. Two days afterward a pair were observed mating. 

 They were standing on one of the vertical sides of the vivarium, facing 

 each other. The male kept waving his second pair of legs in the air; 

 his body was somewhat more elevated than that of his mate, being in- 

 clined downward and forward, wdiile that (if the latter was inclined up- 

 ward in front. Similar observations were subsequently made on many 

 other individuals. When alarmed both sexes have a habit of standing 

 on six legs, rapidly vibrating the body and moving the second legs iu 



