ANTTRIDA. 139 



X.— APPENDIX. 



The Parasites of Collembola. 



Minchin (Lankester's Treatise on Zoology, Part L, 

 2nd Fascicule) enumerates two species of Sporozoa as 

 being parasitic in Collembola, viz. : — Gregarina podura' 

 (Leger) from the gut of Orchesella villosa and Glugea 

 thysanurm (L. Pfr. ) from the gonads of Podura aquatica. 

 The occurrence of Sporozoa in Collembola has also been 

 referred to by Lubbock and Sommer. 



The presence of Nematodes in the gonads of Anurida 

 is recorded in this Memoir, and Sommer states that he has 

 met with them in Tomocerus (Macrotoma). 



The present writer has recorded (Ann. Mag. Nat. 

 Hist., ser. 7, Yol. XV., 1905) the habits of a marine 

 Pseudoscorpion, Ohisium maritimum, Leach, which 

 probably preys upon Anurida. 



Note ox Anurida crassicornis, IIeut. 



L. and 0. M. Peuter (86) describe this species from 

 the river Tay, near Perth, and state that it is very like 

 and allied to A. maritinia, but differs in its much shorter 

 and thicker antennae, in the structure of the head (the 

 inter-antennal lobe being pentagonal, with almost straight 

 sides and well separated from the rest of the head) and in 

 the more robust body. The description is unaccompanied 

 by any figures, and, according to Carpenter and Evans 

 (54), the types are unfortunately lost. 



The Economic Aspect of Collembola. 

 Springtails have not up to the present attracted much 

 attention from economic biologists, though occasionally 

 instances are known where they have done injury to 



