VIII 



RESULTS FROM GIPSY MOTH PARASITE LABORATORY. 



Investigations into the habits of certain Sarcophagidse T. L. Patterson. . 25 



Introduction (by W. F. Fiske) 25 



General conditions 27 



Collection of gipsy-moth pnp;^ for maggots of Sarcophagidae 27 



Experiments with adult Sarcophagidre 29 



Experiments with first-stage maggots on living and dead material 30 



Relation of decomposition to oviposition 30 



Conclusion 31 



The chalcidoid genus Perilampus and its relations to the problem of parasite 



introduction Harry S. Smith . . 33 



Introductory , 33 



Biology of Perilampus hyalinus Say -. 34 



Oviposition 37 



Reproductive capacity 39 



Description of planidium "39 



Habits of planidium : .-. 41 



Life as a parasite of Varichccta 42 



As a pai"asite of Limnerium, validum Cresson 43 



As a parasite of summer-issuing Hymenoptera 44 



As a parasite of other hosts 45 



Later larval stages 45 



Pupation 47 



Food habits of the adult 48 



Longevity and oogenesis 49 



Length of life cycle and influence of temperature 49 



Effect of parasitism upon host 1 51 



Percentage of parasitism 52 



Superparasitism 53 



Perilamjius versus Perilampus 53 



Perilampus versus Dibrachys 55 



Perilampus, ' ' species A" 55 



Development of Orasema 57 



Planidium of Orasema viridis Ashmead ; . . 59 



Relationship of Eucharidae and Perilampidae 59 



Rhipiphorus and other coleopterous parasites 60 



Host relations of the genus Perilampus 61 



Rearing records of Perilampus hyalinus at the laboratory 61 



Other American rearing records of Perilavipus 62 



European rearing records of Perilampus 64 



European species of Perilarnpiis reared at the laboratory 65 



Resume of host relations of the genus 66 



The economic aspects 67 



Experimental parasitism: A study of the biology of Limnerium validum (Cres- 

 son) P. H. Timherlake. . 71 



Introduction 71 



Experiments 72 



General methods of experimentation 72 



Behavior of Limnerium validum (Cresson) in confinement 73 



Limnerium validum. as a parasite of Euproctis chrysorrhoea (Linnaeus). . 73 



First experiment 74 



Second experiment 74 



Amoebocytosis as a protective reaction of the host 75 



Adaptation of parasite to host 76 



Further experiments with Euproctis chrysorrhcea 77 



