640 ENTOMOLOGICAL NEWS. [December, 



occurrence of the species north of the southern third of Trumbull County. 

 The area indicated by the accompanying map will show the extent to 

 which the latter county is covered by this brood. Excepting along the 

 borders of the area covered by the cicada the present year in Ohio, the 

 occurrence was very marked and the insects were present in very great 

 abundance, and the brood might be designated in Ohio as a very corn- 

 pact one. 



The exact area over which the species occurred the present year in 

 Ohio may be indicated as follows : Starting near Empire, Jefferson County, 

 on the Ohio River, and extending across the northeast corner of the county 

 into Carroll, thence to Minerva, in the extreme southeast corner of Stark 

 County, northward to Alliance, in the northeastern portion, near the 

 extreme northwest corner of Columbiana County east of near Deerfield, 

 in the extreme southeast portion of Portage County, thence to North 

 Jackson, Mahoning County, Lordstown, Niles and Tyrrell Hill, in Trum- 

 bull County. This line marks very nearly the extreme border of occur- 

 rence of the species, but does not mark the outline of its area of greatest 

 abundance. 



Nothing has been learned the present year that will extend our knowl- 

 edge of the habits of the species. It is both interesting and surprising 

 that it should not occur north of the area indicated, even in limited num- 

 bers. Of course, there might be an occasional stray in this area, but 

 certainly there were not enough to warrant any portion of it being in- 

 cluded in the territory covered by the brood. F. M. WEBSTER. 



CRIOCERIS ASPARAGI : THE FOUNDING OF A COLONY. 



This species is working its way slowly across Northern Ohio from east 

 to west, and I have been much interested in the details of its progress. 



Several years ago some asparagus was planted near the insectary at the 

 Agricultural Experiment Station at Wooster, with a view of determining 

 the first appearance of the insect in this section of the State. 



The first individual made its appearance on the decoy plants July 25, 

 1899. This individual was watched carefully, but no others were ob- 

 served during the remainder of the year and there were no offspring. 



From early spring of 1900 the asparagus plants were watched closely, 

 but it was July 2oth when a single adult appeared. The next day there 

 were two, and on the 23d two of each of the sexes. Pairing began at 

 once, and soon there were eggs. By September ist the plants had 

 become badly infested, both adults, eggs and larvae being all very 

 numerous. 



I take it that this is the usual method of diffusion over and occupation 

 of new territory by this species, and it would be interesting if the obser- 

 vations of others could be placed on record, not alone as regarding this 

 species, but others as well. F. M. WEBSTER. 



