147 



and winter. European observers seem to find it rather infrequently. 

 The species appears to be a comparatively harmless one. It is probably 

 the young of this species which Wedl found associated with Twnia 

 evpansa, and B-ArQGd Triohosoma papillosum. Wedl characterized it as 

 having a double uterus and the mouth furnished with four papillse. 

 Neither of these characters is inconsistent with Strongylus filicoUis, 

 while the fact that Wedl's species, with a double uterus, was classifled 

 iu a genua whicli has a single uterus and spicule indicates an error. 



