60 Bulletin No. 159 



gradually in width to the posterior end of the body; posterior 

 margins straight, except that of the last which is angled; 

 edged with a fringe of short bristles. Legs short and stout, 

 gradually increasing in size from first to third ; femora very 

 stout and flattish. Sterna of thoracic divisions large, plate- 

 like; the sides and posterior angles of first rounded, the 

 posterior margin broadly incised; sides of second rounded, 

 posterior margin broadly and deeply excised; third narrower, 

 angled, the posterior margin still more deeply concave. 

 Body everywhere clothed with a fine felt-like pubescence. 

 Edges of segments above and at sides with series of short 

 rigid spines. At the posterior end of the body is the usual 

 pair of tapering jointed appendages, characteristic of the 

 family. Respiratory organs in the form of simple tapering 

 white filaments arising at the bases of the legs, both above 

 and beneath. 



Color brown, eyes black; obscure dusky markings on 

 first segment of the thorax; second, with three elongate 

 dusky dots; third with three similar dots, the median longest, 

 all concealed by the overlapping second tergum. 



ARACHNIDA (MITES, ETC.). 



Members of this group of animals could be found about 

 the edges of the streams at any time, but there were none 

 that attracted special attention because of any apparent 

 relation to the object of my investigations, except jiggers, 

 chigoes, or harvest mites. These microscopic mites were 

 common about the streams in the vicinity of Pineville in 

 August, and are the cause of a good deal of annoyance 

 during the summer to those who go much among blackberry 

 bushes and other shrubbery along the banks of the streams. 

 Berry pickers are especially liable to attack. But the mites 

 attack by preference the covered parts of the skin, and gen- 

 erally those regions upon which the clothing presses most 

 closely, as about the waist and under socks and stockings. 

 In the case of men I know from experience that jiggers 

 sometimes manage to get under the tongues of shoes and 

 cause red mounds on the upper surface of the feet. 



