30 BIBLIOGRAPHY OF ECONOMIC ENTOMOLOGY. 



196. [WALSH, B. D.J Notices. <Pract. Ent., December, 1866, v. 2, 



p. 35. 



Mention of several agricultural journals. 



197. WALSH, B. D. On the insects, coleopterous, hymeuopterous, and 



dipterous, inhabiting the galls of certain species of willow. 

 Part 2d and last. <Proc. Ent. Soc. Phil., December, 1866- 

 January, 1867, v. 6, pp. 223-288. 



See No. 46 for Part 1st. Supplementary notes on the Cecidomyidce (gall-makers 

 and guest-flies) ; criticism of statements of Fitch and Harris ; discussion of 

 structure and habits of Tenthredinidce and insects generally; synopsis of 

 tenthredinidous willow-galls; descriptions of the galls, their makers and 

 inquilines ; fpr the new species described, see the Systematic Index ; remarks 

 otfspecies and varieties; figures fore-wings of Tenthredo and Ichneumon. 



198. W[ALSH], B. D. Plant-lice their friends and enemies. <Pract. 



Ent., January, 1867, v. 2, pp. 37-44, figs. 



Method of work and mode of reproduction of Aphididce ; their relations to 

 ants ; plant-lice enemies ; figures Aphis mail and several enemies of plant- 

 lice ; means against Aphididce. 



199. W[ALSH], B. D. Birds versus insects. <Pract. Ent., January, 



1867, v. 2, pp. 44-47. 



Insectivorous birds not necessarily beneficial ; a bird must be shown to eat 

 at least thirty (30) times as many injurious insects as it does beneficial ones 

 before it can be considered useful. 



200. [WALSH, B. D.] [Insects named.] <Pract. Ent., January, 1867, 



v. 2, p. 47. 



Answer to inquiry of J. Pettit ; identification of many species, mostly beetles ; 

 characters and food-habits of Clerus nigripes [= 4-guttatus] ; habitat of Lep- 

 tura capitata and Tingis [=Corythuca] ciliata. 



201. [WALSH, B. D.] [Apple-tree insects.] <Pract. Ent., January, 



1867, v. 2, p. 47. 



Answer to inquiry of M. Hobart ; increasing distribution of Aspidiotm conchi- 

 formis [= Mytilaspis pomorum] ; enemies of the same ; characters of the eggs 

 of Aphis mali. 



202. [WALSH, B. D.] [Work in entomology.] <Pract. Ent., January, 



1867, v. 2, p. 47. 

 Answer to G. Scarborough ; advice for the study of entomology by beginners. 



203. W[ALSH], B. D. The true Thrips and the bogus Thrips. <Pract. 



Ent., February, 1867, v. 2, pp. 49-52, figs. 



Natural history, characters, habits, and figures of Thrips sp. ; characters of 

 the larva and imago of HaUic.a chalybea; figure of imago ; habits of species 

 of Erythroneura [= Typhlocyba] ; description and figures of E. [=T.] vitis. 



204. W[ALSH], B. D. Universal remedies. <Pract. Ent., 1867, v. 2, 



p. 52. 



Exposure of proposed universal remedy against fruit-tree insects. 



205. W[ALSHJ, B. D. Poisoning noxious insects. <Pract. Ent., Feb- 



ruary, 1867, v. 2, pp. 52-53. 

 Sugaring with poison as a means against Noctmdce. 



