- 220 - 



Mandibles proportionally robust; the fixed finger with about 

 12 small teeth of about equal size and closely set; the moveable 

 finger with 5 rather strong teeth of unequal size, in the distal 

 half. 



Galea. One galea has the extremity divided into t\yo small 

 teeth: the other is undivided in the tip, but has a central tooth 

 on the back; both galeas are of small size. 



Legs densely clothed with moderately long and acute hairs; 

 the femora of the two posterior pairs of legs moderately broad. 

 Coxa of I. pair with a brown point at the extcrio-anterior cor- 

 ner. Claws simple. 



Length: 3.8 mm. 



Measurements. Cephalothorax: long. 0.94; lat. 0.72. Mandibles: 

 long. 0,57. Femur: long. 1.10; lat. 0.27. Tibia: long. 1.00 (of which 

 the stalk 0.28); lat. 0.36. Hand: long. 0.86; lat. 0.50. Fingers: long. 

 0.93 mm. 



Habitat. U. S. A. Tacoma: Elbe, 1 specimen. 



The species differs from Ideoroncus mexicanas Banks, rede- 

 scribed by With, by having no eyes and by the strongly granu- 

 lated palp. 



As to Idt'O'oncus obsorrus Banks, the description of this species 

 is so incomplete, that no sure decision is possible. I have, some time 

 ago, in « The Canadian Entomologist » (May 1908, p. 163) recor- 

 ded this species from Western Canada, but this specimen is com- 

 pletely different from the animal from Tacoma, described above. 



9. — Obisiuni paryulnin Banks. 



U. S. A. New York, 3 adult specimens and 10 jun. 



I believe that these specimens belong to the named species, 

 but they are so similar to the Norwegian species Ob. brevifemo- 

 ratiim Ellingsen and to Obislum pìjgmaeìon Ellingsen from Lipan, 

 that there is great possibility for all three species being identic. 



10. — Chthonius tetrachelatus Preyssler. 



U. S. A. New York, 2 d", 2 9, 15 jun. 



The American specimens are completely like European ones. 

 I suppose that this species is what Nathan Banks has named 

 Chth. longipalpis.'H.. Hagen described in 1869 (Ree. of. Amer. 



