ECONOMIC ZOOLOGY ENTOMOLOGY. 753 



The report of the traveling entomologist considers details relating to the 

 work of collecting white-grub parasites {Tiphia inornata and tachinid species). 

 In collecting material the author has found that the females of Lachnosterna 

 iniplicata, the most common species in Illinois, feed largely on the leaves of 

 Cottonwood and willow. Since they do not fly far after feeding before oviposit- 

 ing, large niimbei's of larv?e are most often found in fields near such trees. 



An account is also presented of a trip to Cuba and Jamaica made during the 

 winter of 1914 for the purpose of investigating sugar-cane insects and their 

 enemies, especially the sugar-cane borer (Diatra'a saccharalis) and the root 

 borer {Prwpocles vittatus). The author found the sugar-cane borer apparently 

 less common in Cuba than in Porto Rico and Louisiana. A tachinid fly {Tachi- 

 noplujto [Hypostemi] sp.) was found to be the most important larval parasite 

 of D. saccharalis in Cuba. It was found abundant in nearly every field in 

 which the borer was present, and it is estimated that 25 per cent of the borer 

 larvaj in Cuba, half grown or larger, are parasitized by this tachinid. A 

 similar species occurs in Jamaica. Several predaceous larvse of an elaterid 

 beetle were found in the borer tunnels at Chaparra. Other important insect 

 enemies of cane observed in Cuba are the mealy bug {Pseudococcus sp.), Sole- 

 nopsis geminata, the weevil stalk borer (Aletamasius sericeus), the West Indian 

 sugar-cane leafhopper (Delphas saccharivora) , and the root borer Diaprepes 

 abbreviatus. 



In Jamaica it was found that the root borer P. vittatus, previously an impor- 

 tant sugar-cane pest, but which is parasitized by Elis atrata, has not been 

 abundant in recent years. The fact that the sugar-cane borer is generally less 

 abundant in Cuba and Jamaica than in Porto Rico and Louisiana is due in part 

 to parasitism by tachinid flies, the general practice of not burning trash w^hich 

 favors the effectiveness of the egg parasite Tricliogramma minutttm, care in 

 planting seed free from Diatrsea larvae, and sanitation in harvesting cane, 

 that is, cutting close to the ground and destruction of injured stalks. 



The report of w^ork at the south coast laboratory deals with the injury by 

 beetles and by white grubs, species responsible for injury, injury by other 

 scarabiBids, field habits of Lachnosterna, laboratory work with Lachnosterna 

 and related Scarabaeidse, control of white gi'ubs, and release of parasites in 

 Porto Rico. 



[Report of the] division of entomology and zoology (Washington Sta. Bui. 

 121 (1915), pp. 30-38, figs. 2).— The investigations in Washington State have 

 shown that differences in the viability of scale insects are not due so much to 

 the strength of the spray employed as to the locality where the spraying is 

 done. There was found to be a much greater difference in the effect produced 

 by a single spray at Wenatchee and Clarkston than between the effect of an 

 excessively strong spray as compared with an excessively weak spray used at 

 either place alone. See also a previous note by Melander (E. S. R., 34, p. 551). 



It is stated that the Colorado potato beetle has now become acclimated to 

 conditions in eastern Washington and is proving to be as destructive there as 

 elsewhere. Brief reference is made to the study of endoparasites of the cabbage 

 aphis and other insects, and brief reports are given of the work with root mag- 

 gots and the Columbian ground squirrel. The data secured in investigations 

 have shown beyond doubt that there is but one brood per year of the Colum- 

 bian ground squirrel, and for this locality the litter appears above the surface 

 about the first to the tenth of May. 



[Report of entomological work], J. S. Dash {Rpt. Dept. Agr. Barbados, 

 1913-1/f, pp. 37-/^3). — The author reports upon the occurrence of the more im- 

 portant insects of the year in Barbados and work therewith. 



