546 IIAKVKi^T-SriDERS OF OHIO WEED. 



it is tlifiicult to draw the line between tliein. I have sujigested* that 

 it would be well to refer to dorsatum the forms from those localities in 

 which the average leng'tli of the second pair of legs of the males is less 

 than 70 or possibly 7.")""". A<'cording to this division most of the forms 

 from the ceutr;il and nortliern portions of the State would belong" to 

 (lorsatum. 



Liobuniim vittatum doisatuni (Say) Weed. 



(Plate Lvii, Fig. 3.) 



I'hala)i(jiiim dorsatiim Say, Jour. Phil. Acad., ii, \i. (i6. Com])!, writ., ii. p. 13. 



^yoo(l, Comni. Essex lust., vi, p. 18. 

 L'whunnm dnrsaliim (Say). Weed, Auier. Nat., xxi, p. ilH.o. ]5ull. 111. State Lab. 



Nat. Hist., HI, p. 83. 

 Liobunum rittatum dorntilnm (Say). Wood. Anicr. Nat., \x^■I, p. 7St). 



This form (lifters from L. riltaium only in its smaUcr body and shorter 

 legs. The average length of legs of seventeen specimens, taken at 

 Columbus, was as follows: Frst, 35'""'; second, 60.8"""; third, 35"""; 

 fourth, 50.2""". A vet y short-legged specimen of this form, from Dakota, 

 is shown in Fig. 3, Plate lyi. 



This is perhaps the most abundant representative of the family in 

 the central and nortliern part of the State. ''This species evidently 

 passes the Avinter in the egg state, as it has never been taken during 

 the winter or early spring months. The eggs of the nortliern form ap- 

 l)aiently do not hatch verj- early, probably not until May, and the 

 young grow slowly. Occasionally I have found a fully developed one 

 during the latter part of June, but generally they do not become ma- 

 ture until July. My collections sho^v two half-grown specimens taken 

 at Columbus, Ohio, July 30, 1888, and another collected iu the same 

 locality July 10, 1888, which is not fully developed. 



''When very young these harvest-men seem to prefer the shelter of 

 the grasses, low herbage, and rubbish i)iles, but as they grow larger they 

 are to be found in a great variety of situations. In the prairie regions 

 of central Illinois, Avhere nearly all of the country is occu])ied by corn 

 tields and osage orange hedges, the young are very common on the corn 

 ])lants, wiiere, as I have elsewhere surmised, they i)robably live upon 

 the numerous small insects drowned in the moisture contained iu the 

 bases of the unfolding leaves, as Avell as on the corn plant lice {Aphis 

 7n((ifHs), The full-grown individuals ari^ to be found nearly every- 

 Avhere, on bushes and trees in the woods, in meadows and i)astures, 

 along fences, and in sheds and outhouses. They occur abundantly 

 from July to Octolx'r. 



"The only opportunity 1 have had of studying the long-legged 

 southern form in the held was in southern Illinois during the autumn 

 of 1880. Along th(U'ockyle<lges running across the State and through 

 Union County, these h irvest-sj)ideis were exceedingly abundant, oc- . 

 curling everywhere on the rocks and ground. They were so numerous 

 that as one walked in theo])en groves on the farm of Mr. Parker Earle 

 they would run along in tlroves. 



