62 AMERICAN SPIDEKS AND THEIR SPINNINGWORK. 



directly upon various surfaces without tented enclosures, or like special pro- 

 tection, would be most exposed to hymenopterous assault. In point of 

 fact, these genera are numerously represented in the lists of parasitized 

 spider eggs; but until more facts are in hand it is impossible to say 

 whether the proportion is greater or less than, for example, with the Orb- 

 weavers and Lineweavers, whose methods of protection are in this respect 

 so different. 



Sixth, t^ie personal carriage of the cocoon by I/ycosids would seem to be an 

 impoi'tant factor in preserving the eggs. At least I have not found a single 



reported case of parasitization in cocoons of species having this 

 Carriae-e ^^^^^*'> which might be owing to poverty of observation rather 



than of existing facts. Some of the reported parasitized cocoons 

 we know to be personally guarded by the mother, as in the case of Salti- 

 grades, who usually stay within their silken cells with their eggs, and, for 

 awhile after hatching, with the young also. Occasional excursions for 

 food, however, might afford the required opportunity to the mother parasite. 



