A Monograph of Scytonotus. 23*7 



accord with an}' of the described genera, and future investigation 

 may result in the erection of a new genus for its reception. 



Scytonotus caveriiarus Bollman. 

 Entomologica Americana, Vol. Ill, p. 45. 



"Allied to nodulosus Koch. Pure white throughout. Slender, 

 somewhat depressed, accuminate anteriorly. Antennte exceed- 

 ing the width of body, clavate. First dorsal plate elliptical, 

 angles sharp; scales arranged in five transverse series, anterior 

 row sharp, setigerous, all covered with fine granulations. Other 

 dorsal plates with all the lateral sides sharply and deeply four or 

 fiA'e toothed, scales arranged in four rows, the posterior row more 

 or less setigerous, on posterior segments the anterior row is not 

 very distinct. Repugnatorial pore scale large and swollen. 

 Legs moderately long and slender. 



" Length of body, 11 mm.; width, L5 mm. 



" Habitat: Mayfield's Cave, Bloomington, Indiana. 



•' This species is described from one female found in motion on 

 the floor of the above cave in October. 1886. As already stated, 

 this species is more nearly related to nodulosus^ but as granula- 

 tus is the only species so far found in the vicinity of Blooming- 

 ton, I suppose it is descended from granidatus.'''' 



The above original and only description of this species makes 

 its generic assignment a matter of doubt. Nodulosus, as has 

 been shown, is not con-generic with granulatiis. That Mr. Boll- 

 man's species is at once more nearly related to nodulosus, but 

 descended from granulatus necessarily involves the further infer- 

 ence that nodulosus and related species are likewise descended 

 from granulatus, for which supposition there seems not to be suf- 

 ficient ground. There is also nothing to indicate that Mr. Boll- 

 man counted the segments, and his animal may be a species of 

 Brachydesmus, the European species of which are largely caver- 

 nicolous. 



Scytonotus setiger (Wood) Bollman. 



Trans. Am. Philos. Soc. (t8G5) p. 214. 

 Proc. U. S. Nat. Mus. (1888) p. 840. 



Mr. Bollman referred this species to Scytonotus probably be- 

 cause he recognized in it a congener of S. nodulosus Koch. 



