378 



dostigmatic organ slender, pectinate, and clavate. The general 

 shape of the cephalothorax is that of an isosceles triangle with 

 its base corresponding to that of the cephalothorax. 



Abdomen oval, with about twelve short, slightly curved 

 bristles; progaster curved down convexly to meet the cephalo- 

 thorax. Ventral plate large; anal covers large, almost attain- 

 ing the posterior margin of the abdomen, and about twice 

 their length from the genital covers, which are about three 

 fourths as long as the anal covers and situated very near the 

 anterior margin of the ventral plate. 



First pair of legs almost as long as the body, and each 

 succeeding pair slightly longer than the preceding one. Tarsus 

 of the first pair of legs somewhat globose at the distal end; 

 coxae of the third pair globular, each bearing a large bristle 

 on its anterior end; tibiae of fourth pair each bearing on the 

 anterior distal margin a large bristle as long as the tibia itself. 



Length, 0.50 mm.; breadth, 0.28 mm. 



Collected by the writer at Urbana, 111. Many specimens. 

 I find that my examples of this species agree with a European 

 specimen of nitens sent to me by Mr. Michael. 



Genus Hermannia Nicolet. 



Without lamellae; legs short and stout; ungues monodactyle; 

 dorsum of abdomen convex; genital and anal covers separate 

 and placed in a ventral plate. 



One species — b /striata. 



Hermannia bistriata Nicolet. 



1840. Nothrus palliatus, C. L. Koch, Crust. Myr. Arach., Heft 30, Tab. 4 



(Nymph). 

 1880. Hermannia bistriata, Michael, Jour. Roy. Micr. Soc, Vol. III., p. 42. 

 1885. Nothrus bistriatus, Berlese, Acari, Myr., Scorp., Fasc. XVII., Nr. 9. 

 1888. Jfermanniu bistriata, Michael, Brit, Orib., Vol. 11., p. 462, PL XLII., 



Fig. 8-14. 

 1898. Hermannia bistriata, Michael, Das Tier., Lief. 3, p. 63. 



Dark chestnut-brown; integument rough, and in some 

 places slightly pitted. 



Cephalothorax fully half as long as the abdomen, with two 

 chitinous ridges on the dorsal surface, which, beginning at the 



