PARASITES OF SPIDEKS AND THEIR EGGS. 



Micariii (unknown). IV/omarlms olwimi.s. I'V'H |>ara*ili'. 



llcniitrlc.< inicarivora. 



lYosthi'siniH 1'mvata. I Inn'itc-lrs prosthcHin.-r. 



Prassid (unknown). 1 Irmilcl.'s dransi. 



lapidicnlens. 1'olyspliiiu-ta liilicrofla.* l'..l\ |.:n 



hnninra. Ik'liiitrlr* teller! iluus.* 



Ilt'iiutrlrs aiam'anuu.* 

 Heinitelcs fonnoHiis.* l!o.ly 



IV/oiiiaclms lawiatus.* |i,n:i-ite. 



rorruptor.* 

 s proxinitl.-'. 

 IV/immclms xonatua.* 

 Drassid (unknown). Kii|K'lnius dmwi. 



LATERIGRADE, SALTIGRADE, CITKIUADK. 



Laterigrade cocoon. IV/omarlms fjracile. I'i'K parasite, 



h'ius (unknown). Polysphincta n. sp. I'.ody parasite. 



Sai'tis pulex. Acoloides saitidcs. lv_"_' pavasiU'. 



Phidippus moreitans. 



I'ardosa luteola. Polyspliim-ia . Body parasite. 



IX. 



It is difficult to make any correct generalizations from the data in hand 

 on this most interesting chapter in the biology of spiders, since tin- Sfx 



or even genus of the host is in so many cases unknown, even 

 Generali- 



when the parasite has been determined. But a few hints appr;ir 



from the study of the above lists and preceding facts which 

 may serve to at least open the way for others who in the future may 

 have more perfect information. 



First, it is evident that the exclusive occupation of a specific host hij n 

 specific guest is not the fixed rule. For example, the eggs of Argiope co- 

 phinaria are parasitized by one species of Pezomachus, two of Pimpla, and 

 two (though perhaps as hyperparasites) of Chrysocharis. Again, K|icira 

 diademata of Europe serves as body host for three species of Polysphincta, 

 and its eggs as host of one each of Hemiteles and Pimpla. Once more, 

 Agraca brunnea of Europe has one species of Hemiteles for a body para- 

 site (?), and for egg parasites two species of Hemiteles and three of 

 Pezomachus. Thus it would appear that the occupation of any specified 

 host is not limited to any specific guest, but has a wide possible range, 

 both as to species and genera. 



Second, the prvft'H'iur of mi// xy/cr //''' (liH'xt i* not (t/tctti/.i rniiji/ti-il In IIIK 

 specific host. Thus, Polysphincta carbonator, a European liody parasite, is 

 reported as guest upon three species of Epeira ; and Polysphincta hoops 

 upon both Theridion and Epeira. 



Third, I IK- </*/ arc not absolutely yi<//vf/<v/ !/ their hnbi1x In/<> <l/'xf!n<-t 

 (/i-niijix of body parasite.-*, on Ihc one luind, anil next f,nriix!/'-n n the other. 

 Thus, Polysphincta carbonator is a body parasite upon three Kpeiroid 

 species, but is reported as a guest upon unknown spider eggs; P. rulipe- 



