91 



Tlie attack of this not yet comiiioii curculio occurred near Dayton, 

 Ohio, in a small bed of young- cabbage plants that had been started for 

 late planting'. The ground was a low. marshy field, bordered by a pas- 

 ture of native grasses and other indigenous vegetatiou. in which the 

 pest doubtless breeds. The adult appeared July 18, at which time 

 larvcie were still to be found in the plants. 



Monarthrum fascia turn Say was sent rae in May from Noble County, 

 where it was working with ScoJytus riif/idosus on peach. The .Monar- 

 thrum seemed to bore directly into the wood to a considerable distance 

 and then work as duectly around the tree, so that its burrow consti- 

 tuted a complete ring, and this, too, in the green wood. The Scolytus 

 was exceedingly abundant last year, and there was much complaint of 

 its ravages, superinduced, I presume, by the unusually dry weather, 

 which really weakened the trees without its being noticeable. 



The woolly aphis {Schizoueura lanUjera) is certaiidy becoming more 

 al)undant and working more and more injury to young nursery stock. 

 It has come to me more frequently during the last year than ever before, 

 both from Ohio and Indiana. I have of late been calling attention to 

 the fact that .Vnstralian nurserymen use Northern Spy and Majestine 

 stock upon which to top work other varieties, claiming that these two 

 are proof against this pest, which is there termed the American bhght. 



The time available for the reading of pai>ers having expired, the fol- 

 lowing three papers the authors of which were absent, were ordered 

 read by title and referred to the committee on publications. (That com- 

 mittee, consisting of the president and secretary, has decided to include 

 them in the proceedings.) 



ON THE NATURAL CONDITIONS WHICH AFFECT THE DISTRIBU- 

 TION AND ABUNDANCE OF COCCIDiE. 



I5y T. D. A. COCKF.RELL, Las Cniccs. X. Mex. 



While the danger to horticultural interests from the general spread 

 of Coccidic is sufficiently patent, any one who has given much atten- 

 tion to these insects must have been struck by the difficulty of predict- 

 ing how a particular species will act in any given case. 



For example. Aspidiotus aurantii is very well known as a pest of 

 citrus trees in Oalifornia and the eastern ^lediterranean region. One 

 would have predicted that its introduction into Jamaica — a great 

 orange country — would have been disastrous: but as a nnitter of fact 

 it is already not rare in that island, where it is never observed on 

 citrus. 



Its place on the citrus trees is taken by the similar-looking but 

 structurally (piite distinct .4. articulatus. 



Again. Parlatoria pvr<jan<Jei is known as a citrus scale in the south- 

 ern Fnited States. In Jamaica and Antigua it occurs, but oidy on 

 Croton, never on Citrus. But here conies in an important fact — the 



