Tertiary Spiders and Opiliouids. 237 



reveal anything in the shape of two parallel lines. The eyes can- 

 not be made out clearly and I am iniable therefore to verify 

 Scudder's description of them. On the other hand the sternum, 



X 



Figure 10. — Palccodrassus intcrihis (Scudder). Specimen No. 8269 (80). 

 Spinnerets, x 20. 



not mentioned by Scudder, is clearly visible and has the shape of a 

 very regular oval. Legs in order 4213. Other characters as 

 well as the measurements given by Scudder are correct and there 

 is nothing I could add to them. 



FAMILY CLUBIONID.E. 



Characters of the Family: — Eyes eight, in two rows of four 

 eyes each, usually only the anterior median eyes of the diurnal 

 type. Maxillary lobes without obliquely transverse depression. 

 Tarsi with two claws and ungual tufts. Anterior spinnerets 

 approximated. Colulus wanting. 



So close is the relationship between this family and Drassidae 

 that for a long time the two were regarded as a single family. 

 Simon in his great work has placed the Chibionidae after the 

 Thomisidae with whom they certainly have a great deal of rela- 

 tionship, and before the Agelenidae. He has enclosed in the 

 family the Selenopidse and the Ctenidse. I think these two are 

 better regarded as separate families. It seems to me further that 

 the Salticidae (Attidse) show also distinct relationship with some 

 Clubionids both in structure and in habits. 



The separation of the Clubionidc-e into sub-families is based on 

 the structure of the maxillary lobes, of the lip and of the posterior 

 spinnerets and on the position of the tracheal spiracle immediately 

 in front of or considerably in advance of the spinnerets.* 



