Febnian^, '15] 



CHAPMAX AND GLASER: WILT DISEASE 



141 



Group A contains, with the exception of the silkworm, the insects 

 we have studied. Six families and ten species are represented. 



Group B contains a list of insects reported to have polyhedral-sick- 

 ness by the European investigators, Prowazek, Escherich, Wahl, BoUe, 

 Bohm, etc. 



Group C is made up of insects found in the United States that have 

 a disease or diseases similar to "^dlt in many of its clinical aspects. 

 With the exception of Colias philodice none of this group have been 

 examined bv us. 



List of Species, with Their Distribution 



I. Satumidae. 



1. Hemileuca' olivia Ckll. 

 II. Noctuidse. 



2. Leucania unipuncta Haw. 



3. Laphyg77iafrugiperdaS.&A. 



HI. Dioptidae. 



4. Phryganidia californica Pack 



ard. 



Group A 



IV. Lymantriidse. 



o. Porthetria dispar L. 



6. Lymantria monacha L. 



7. Orgyia leucostigtna A. &. S. 



V. Lasiocampidse. 



8. Malacosoma americanum 

 Fabr. 



9. Malacosoma disstria Hiibiier. 



VI. Bombycidse. 



10. Bombyx mori L. 



I. Sphingidae. 



11. Deilephila sp. 



12. Smerinthu^ atlanticus Auct 

 11. Satumidae. 



13. Antherea pernyi Guer. 



14. Antherea yama Guer. 



15. Antherea mylitta Drur. 



16. Philosamia cynthia Drur. 



17. Saturnia pavonia major O. 



III. Noctuidae. 



18. Prodenia litosia 



IV. Lymantriidae. 



19. Orgyia antiqua L. 



Group B 



V. Notodontidae. 



20. Harpyia bifida Hubn. 

 VI. Geometridae. 



21. Bupalus piniarius L. 

 VII. Tortricidae. 



22. Conchylis amhiguella Hubn. 

 VIII. Tenthredinidae. 



23. Lophyrus rufus Ratz. 

 IX. Muscidae. 



24. Calliphora vomitoria L. 

 X. Dermestidae. 



25. Dermestes lardarius L. 



26. Anthrenus musceorum L. 



Group C 



I. Pieridae. 31. Heliothis obsoleta Fab. 



27. Colias philodice Godart. 32. Autographa gamma californica 



28. Eurymus eurytheme Boisd. Speyer. 



II. Arctiidae. 33. Autographa hrassicce Rileyi 



29. Hyphantria cunea Drury. IV. jSTotodontidae. 



III. Noctuidae. 34. H eterocampa guttivitta Wlk. 

 30. Alabama argillacea Hubn. 



1 January 23, 1915. Polyhedra were found in a caterpillar of Autographa brassicce 

 Riley during the past week. 



