BIBLIOGRAPHY OF ECONOMIC ENTOMOLOGY. 
15 
43. Walsh, B. D. On the pupa of the ephemerinous genus Bwtisca 
Walsh. <Proc. Ent. Soc. Phil., August, 1864, v. 3, pp. 200- 
206, fig. 
Description and figures of the pupa of Bcetisca obesa Say. 
44. Walsh, B. D. On certain entomological speculations of the New 
England school of naturalists. <Proc. Ent. Soc. Phil., Au- 
gust-September, 1864, v. 3, pp. 207-249. 
Discussion of statements, chiefly, by Prof. L. Agassiz, upon questions in gen¬ 
eral entomology. The memoir is divided into sections; in the first, the dis¬ 
tribution of insects in North America is discussed in opposition to the 
views of Agassiz ; in the second section the Darwinian theory of the origin 
of species is discussed and some remarks on the variation of several species 
are added; in the third and fourth sections the statements of Prof. Agas¬ 
siz regarding the worm-like larva stage of insects and the resemblances 
between the pupie of insects and the Crustacea are discussed and criticised; 
in the fifth section the author argues that the relative rank of the differ¬ 
ent orders of insects must be determined from a consideration of all the 
characters of each order and not from the significance of anyone character; 
the sixth section is a review of Dana’s classification of insects on the prin¬ 
ciple of cephalization ; and in the seventh section several erroneous state¬ 
ments and generalizations in the same author’s paper on classification are 
pointed out. 
45. Walsh, B.D. On phytophagic varieties and phytophagic species. 
<Proc. Ent. Soc. Phil., November, 1864, v. 3, pp. 403-430. 
Many species feed exclusively upon a single food-plant, while other species 
feed upon many kinds; correlated with this are certain larval or imag- 
inal differences; when these different forms interbreed they are considered 
the same species and are termed phytophagic varieties; these when sepa¬ 
rated with a single kind of food-plant form phytophagic races, and these 
again by a continuation of their isolation form phytophagic species. Phy¬ 
tophagous forms are most abundant where the imago is wingless. Dia- 
pberomera velii, Tingis [= Gargaphia'] tilice, and T. [= G. ] amorphce are 
described as new ; the following are mentioned in the remarks upon species 
and varieties: Haltica [= Disonycha'] alternata, Chrysomela scalaris, Clytus 
[= Cyllene'] robinice, C. [= C. J pictus, Dryocampa [ = Sphingicampa'] bicolor, 
Sphingicampa distigma [= bicolor ], Bombyx [= Sericaria] mori, Halisidota 
tessellaris, H caryce, H. antiphola [= iessellaris], Cynips [— Amphibolips ] q. 
spongifica, C. [ = Andricus] q. punctata, C. [= A.] q. podagrce, and C. [=lm- 
phibolips] q. inanis. 
46. Walsh, B. D. On the insects, coleopterous, hymenopterous, and 
dipterous, inhabiting the galls of certain species of willow. 
Part 1st—Diptera. <Proc. Ent. Soc. Phil., December, 1864, 
v. 3, pp. 543-644. 
Structural characters, habits, metamorphoses, etc., of Cecidomyidw ; remarks 
on the unity of habits in genera; synopsis of cecidomyidous galls of Salix ,* 
descriptions of new species, their galls and iuquiliues; for a list of the new 
species, see the Systematic Index. See No. 197 for Part 2d. 
47. Walsh, B. D. The borer. <Colman’s Rural World. Reprint; 
<Prairie Farmer, 6 May, 1865, v. 15, p. 355, 
Notice* of soap as a means against borers. 
