384 



SwAiNE (J. M.). New Species of the Family Ipidae (Coleoptera). 

 Part iii. — Canadian Entomologist, London, Out., xlviii, no. 6, 

 June 1916, pp. 181-192, 1 plate. 



This systematic paper describes the following new Scolytidae : — 

 Pityokteines jasperi from Alberta ; P. elegans from Oregon and 

 California, some individuals being taken on Pinus monticola ; Ortho- 

 tomicus lasiocarpi, abundant on Abies lasiocarpa in British Columbia 

 and on Larix americana in Alberta ; O. ornatus from Arizona, Oregon 

 and California on Pinus ponderosa and Pinus jeffreyi ; Ips chagnoni, 

 abundant in Ontario and Quebec, chiefly on Picea canadensis and 

 Pinus strohus, and extending southwards into New York State ; 

 Ips vancouveri, the type of which was taken on Pinus monticola, on 

 Sitka spruce and western white pine in Vancouver Island and the coast 

 of British Columbia and probably in the interior ; Leperisinus cali- 

 fornicus, which is alhed to L. aculeatus, Say, was taken in CaUfornia 

 from living ohve trees to which serious damage was being done. 



Pests and Diseases of Cotton and their Control. — Agric. News, 

 Barbados, xv, no. 368, 3rd June 1916, pp. 182-183. 



The third day's proceedings of the West Indian Cotton Conference, 

 held in March 1916 in St. Kitts, included a discussion on the pests and 

 diseases of cotton. Importations from the United States might 

 introduce the Mexican cotton boll weevil [Anthonomus grandis] 

 into the West Indian Islands, though its importance there might 

 perhaps not be so great as in the Southern States. The internal boll 

 disease does not occur unless cotton-stainers [Lhjsdercus] or other bugs 

 are present. In Barbados, where the stainers do not occur, the 

 disease is associated with the green bug [Nezara]. Sudden invasions 

 of the stainers in Antigua were said to have come from Thespesia 

 popidnea growing on the seashore. In Montserrat the same tree 

 served as a food-supply, while at Nevis, after the cotton crop was 

 gathered, stainers were seen on the physic nut tree [Jatropha curcas]. 

 The control of cotton-stainers should therefore include the destruction 

 of old cotton bushes and of the wild plants on which they feed in the 

 absence of cotton. 



The dispersal of leaf-blister mite of cotton. — Agric. Neivs, Barbados, 

 XV, no. 368, 3rd June 1916, p. 186. 

 In the West Indies the leaf -blister mite [Eriophyes gossypii] has been 

 known as a pest of cotton since July 1903, when it made its first appear- 

 ance in Montserrat. There seems to be no doubt that this mite lived 

 upon some wild plant before the revival of the cotton industry, but 

 this has not been proved by the discovery of such a plant. It appeared 

 in all the islands of the Lesser Antilles very shortly after its first 

 discovery, except in Barbados, where it was only discovered as late as 

 1912, though it had apparently existed there for some years previously. 

 It has been supposed that birds, insects, and even the wind may be 

 responsible for its distribution, and it has also been believed that 

 transportation from place to place may have been effected on cotton 

 seed. In 1914 microscopic observation showed that the full-grown 

 mites had a tendency to ascend to the tips of leaf-hairs and assume 



