34 The Craspedosomatidse of North America. 



rather irregular, longitudinal, siibreticulate ridges; posterior portion an- 

 teriorly slightly rugulose, also finely reticulate, the reticulation extending over 

 the entire posterior portion of the segment; on the posterior margin is a row 

 of ridges similar to those of the first segment. Cephalad of these are also 

 irregular ridges ■which are sometimes in a somewhat definite series and occas- 

 ionally joined to those of the posterior row. Lateral carinse well developed, 

 the carinne and lateral surface evidently reticulate. Tlie three tubercles are 

 situated, one at the posterior angle of the lateral earinse, the second at the an- 

 terior origin of the carina, the third between the anterior and i^osterior sub- 

 segments and about midway between the median line and the lateral carina. 

 On posterior segments the tubercles come to be arranged in a straight line, as 

 is usual in the other species of the family. Dorsal line not evident. 



Anal segment rugulose, posteriorly nearly straight, not produced to cover 

 the anal valves. A tubercle on each side close to the median line, near the 

 middle of the segment. 



Anal valves margined, rugulose. 



Preanal scale, broadly and deeply emarginate ; on each side of the emargina- 

 tion is a long, posteriorly directed bristle. 



Length 2 mm. ; width .4 mm. 26 segments. 



Color horn-brown, the feet paler and the antennse darker than the body. 



Habitat: Beaver Creek, Jefferson Co., Tenn., Prof. J. C. 

 Branner; Little Rock, Ark., Mr. C. H. Bollman, IT. S. Nat. 

 Museum, No. 164. 



The head is proportionally smaller in this species than in the 

 others known to us. The small size, fevs^er segments and pbly- 

 desmoid characters seem to indicate a depauperate form. 



The pair of large terminal spines with papillate bases were not 

 present, but it is probable that they had been broken off. The 

 small size of the animal makes it impossible to distinguish their 

 soekets. 



By " lateral plates distinct " Mr. Bollman probably intended to 

 imply that the lateral carinai are evident. There is nothing sug- 

 gestive of the distinct pleurae of the Glomeridse, 



PSEIIDOTREMIA Cope, 1869. 

 Journ. Am. Philos. Soc, XI, p. 179. 

 Eyes moderately developed, of numerous (13-27) ocelli arranged in irregu 

 lar patches. 



Antennte very long and slender, third joint longest. 

 Mandibles with 12 pectinate lamella;. 

 Promentum present, triangular. 



Segments with swollen, shoulder-like carinae, the lateral surface longitudi- 

 nally striate, the dorsal uneven with rounded tubercles ; setse short, clavate. 



