56 The Craapedosomatidae of North Aniemca. 



" Head with rather short, dense hairs; no eyes, and no ocular depression be- 

 hind the antenna;, the surface of the epicranium being well rounded to the 

 antenna! sockets ; behind the insertion of the antennic the sides of the head 

 are much more swollea than in *S'. ladaritis.^' 



Antennre slender, with short, thick hairs ; relative length of joints, the 6th 

 being longest ; 6th, 4th, 5th, 3d, 8th, 7th. 1st, the 7th being much thicker 

 than the 8th. 



Twenty-eight segments behind the head ; they are entirely smooth, striated 

 neither longitudinally nor transversely ; a few of the anterior segments rapidly 

 decrease in diameter toward the head. The egments are but slightly convex, 

 and on each side is a shoulder, bearing three tubercles in a transverse row, 

 each giving rise to a long stiff hair one-half to two-thirds as long as the seg- 

 ment is thick ; these hairs stand up thickly all over the back, and may serve 

 at once to distinguish the species. 



No pores. 



Feet long and slender, nearly as long as the anteunte, being very slender 

 towards the claws. 



Color entirely white. 



Length of body .35 inch; thickness .04 inch." 



Habitat: Mammoth Cave, Kentucky. 



The above description is that originally given for this species. 

 The importance of several of the included statements is question- 

 able, especially since the accompanying diagrams do not agree 

 with the description. 



The antennae are said to have eight joints, while in the diagram 

 but seven appear. In giving the " relative length of joints" the 

 second is entirely omitted, so that we have no ground for sup- 

 posing that there was a small basal joint not given in the diagram 

 and are obliged to fall back on the fact that in this family the an- 

 tennae haA^e, as far as known, but seven joints. It might also be 

 noticed that if " 2d" is understood for " 3d," " 3d" for " 4th" and 

 so on, the relative length of joints will be the same as Trichopet- 

 alum, 5th, 3d, 4th, 2d, 7th, 6th, 1st. 



The drawing of the entire animal also gives thirt}'' segments 

 instead of twenty-eight, as in the description. 



At a later date Dr. Packard gives a more extended descrip- 

 tiony of this species and genus, differing, besides, from the 

 former description in some important particulars, so that it seems 

 desirable to add a transcription of it. These descriptions con- 



* Dr. I'ackard wrote this while believing the present species to be congeneric 

 with Lysiopefalum ladarmm (Saj^). 



fProe. Am. Philos. Soc, XXI, p. 177, Sept. 1883. 



