106 



36. Phytoptus abnormis, Garman — Tilia Americana L. 



37. Phytoptus acericola, Garman — Acer saccharinum L. 



38. Pliytoptus quadripes, Shimer — Acer saccharinum L. 



39. Pliytoptus ulmi, Garman — Ulmus Americana L. 



40. Erineum anomahim — Juglans nigra L. 



From the above hsts it Avill be seen that Ave have representatives from 

 every order of insects which produce galls, except Coleoptera. 



Doubtless the number of gall-producing insects in Indiana will far 

 exceed 300 species. I should be very glad if nieml)ers of the Academy 

 will send specimens to me. Specimens may be sent either fresh or dry 

 or in formalin. Always send enough of the host plant to enable deter- 

 mination. 



KoTES ON Deformed Embryos. 



Mel T. Cook. 



It is well known that extremes of temperatui-e will produce malformed 

 embryos, but it is also probable that malformations may result from 

 other causes. 



Last spring the students in my class in embryology found a very large 

 numljer of deformed chick eml)ryos. The most common malformation 

 was two or more blastoderms, but in many cases the embryos did not 



\ ' ~"^- 







develop beyond the formation of the primitive streak. The farthest 

 developed and most remarkable deformity was in the case of two embryos 

 so placed that anterior ends were .ioined and the posterior ends extending 

 in opposite directions. Judging from the mesoblastic somites, the era- 



