168 JOURNAL OF ENTOMOLOGY AND ZOOLOGY 



Xenylla paludis n. sp. 



Description: Length — 1.3 mm. Color — Yellow with dark 

 spots. Antennae — Shorter than head. Ocelli — Ten, five on each 

 side of the head. Claws — One, unarmed, short and greatly 

 curved; tenent hairs, one. Furcula — Short, slender and weak. 

 Mucrones, one small hook. Anal horns — Two, short, little 

 longer than papillae. 



Habitat: Chino swamp, April, in rotten log. 



Family APHOEURID^ 

 These are the most primitive of the Collemhola, lacking the 

 furcula. They are slow-moving, sluggish, and are found mostly 

 in the moist soil or rotten wood. Three genera of this family 

 are represented here. 



Key to the Family APHOEURID^ 

 A. Dorsal side of the body with large tubercles; abdomen 

 ending in four rounded tubercles; postantennal organ 

 present or absent. Genus Neanura 



AA. Dorsal side of the body without large tubercles. Pseudo- 

 celli present, postantennal organ present. 

 B. Feet with two claws, anal horns none or two. 



Genus Aphorura 

 BB. Feet with one claw, anal horns two or four, post- 

 antennal organs placed in rows. Genus Tullbergia 



Genus Neanura MacGillivray 



The neanuras are sluggish insects and may easily be recog- 

 nized by the broad flat shape of the body and the large tuber- 

 cles. They are found usually in moist rotten wood. 



Only one species of this genus has been found here and it 

 is not the one that is found almost all over the world but one 

 that has been reported from the Arctic region. 



Neanura giganfea Tullherg 

 Anura gigantea Tullherg, Ofv. k. vet. Akad. fork., XXXIII, no. 

 5, p. 41. Schott, k. sven. vet. Akad. hand., XXV, no. 11, p. 

 94, 1894. 



