Sept., igog.l EwiNG t New AMERICAN OrIP-ATOIDEA. 129 



All the segments of the legs with a swollen portion ; second pair of legs subequal to 

 the preceding or succeeding pair ; no prominent tubercle on distal end of tibia 

 of leg I. (Subdiv. (i).) £>. mic/iae/i sp. nov. 



Damaeus magnisetosus, new species. (Plate V, Figs. 25 and 26.) 



Chestnut brown. 



Cephalothorax large, fully two thirds as long as the abdomen and about three 

 fourths as wide as the same. Pseudosligma cup-shaped, projecting ; pseudostig- 

 matic organ very large and long, fully one half as long as leg II, head clavate and 

 pectinate. Anterolateral hairs stout and very curved. There are prominent tecto- 

 pedi'a for the first two pairs of legs. 



Abdomen as broad as long ; dorsum with a few short, stout, curved bristles. 

 Genital covers as broad as anal covers but not so long, separated from the anal covers 

 by a very narrow chitinous band ; anal covers situated about one third their length 

 from the posterior margin of ventral plate. Ventral plate circular, as broad as long. 



First pair of legs as long as the body ; second pair about three fourths as long as 

 the first pair ; third pair equal to the first, and the last pair of legs the longest of all. 

 Tarsus of leg I shorter than the tibia. The tibia of leg I is peculiar in this species in 

 that it possesses a large process or tubercle at its dorsal distal aspect from which 

 arises a large, long tactile hair. Ungues tridactyle, situated on very long and slen- 

 der tarsal pedicels ; dactyles unequal. 



Length, 0.53 mm.; breadth, 0.35 mm. 



In moss. Collected by C. A. Hart at Pulaski, 111., and by the 

 writer at Areola, 111. 



This species is remarkable in possessing stich large pseudostigmatic 

 organs and the bristle bearing tubercle on the tibia of legs I, also in 

 length of the second pair of legs which are much shorter than the 

 other pairs. 



Damaeus michaeli, new species. (Plate V, Fig. 27.) 



Chestnut brown ; integument brittle, surface almost smooth. 



There is a deep constriction between the cephalothorax and the abdomen ; 

 pseudostigmata funnel-shaped ; pseudostigmatic organ longer than the cephalothorax, 

 pectinate and flagelliform, projecting almost at right angles to the margin of the 

 body ; two pairs of curved rostral hairs. 



Abdomen globular with a curved row of large, curving, pectinate bristles on the 

 posterior margin. Anal and genital covers subequal, separated by about one half 

 their length. 



Legs stout ; femora with narrow peduncle and large clavate head ; each segment 

 bears several stout, curved, pectinate bristles. Portions of cast skin generally carried 

 on the dorsum of the abdomen. 



Length, 0.54 mm.; breadth, 0.32 mm. 



In moss and under bark of logs. Collected by myself, Homer, 

 Illinois. Many specimens. 



