April, '09] JOURNAL OF ECONOMIC ENTOMOLOGY 127 



honeycombed appearance and short spicnles. The chorion has a 

 sculpturing that is similar to niveus. The average length of twenty- 

 five eggs that were measured was 2,924 microns and the average width 

 on the broadest portions was 580 microns. The length of the egg caps 

 averaged about 342 microns and the width 447 microns. The eggs 

 of this species differ from those of niveus in that they are more slender 

 and are of a deeper yellow in color, and have shorter spicules on the 

 egg caps. Injuries to raspberry canes by nigricovnis are common. 



President Forbes : Discussion of this paper is now in order. 



I\Ir. Hopkins : ]\Ir. President, I am especially interested in this 

 paper and am glad to know the species concerned, because it has always 

 been a mystery to me as to what species caused the damage. My ob- 

 servations, however, are that the eggs were deposited almost invariably 

 in pairs and that in a great many cases the canker did not follow the 

 puncture. (Mr. Hopkins then exhibited a plate which he had pub- 

 lished in Bulletin 50, West Virginia Agricultural Experiment Sta- 

 tion, illustrating the work of tree crickets.) 



Mr. Parrott : I do not want to leave the impression that the cank- 

 erous condition was common with all the punctures. This was not 

 the case. It was present, however, with many of the punctures. 



Mr. Slingerland: We have one of our graduate students at 

 Cornell working on this problem and his results are similar to those 

 of Professor Parrott. 



President Forbes: Any further discussion? The next paper on 

 the program will be read by Mr. H. E. Summers. 



THE DISTRIBUTION OF SAN JOSE SCALE IN IOWA 



By H. E. SuMMEKS, Ames, loica 



As the line marking the northwestern limit of injury by the San 

 Jose scale in the Mississippi Valley passes thru Iowa, the localities in 

 which it has establisht itself in the state seem worthy of record. It 

 has so far been found doing injury only in five counties, namely: 

 Decatur, Lee, Louisa, Mahaska and Linn. Only one center of distri- 

 bution has been found in each of these localities. Four of these coun- 

 ties are south of the 42d parallel ; only Linn County being north of it. 

 Four of the outbreaks were in orchards, in all of which some trees 

 were killed. The fifth case was in a nursery in which an isolated 

 block of transplanted trees had been standing for several years, and 

 were found generally infested. Some trees were dying. This block 



