BIBLIOGRAPHY OF ECONOMIC ENTOMOLOGY. 73 
605. [Walsh, B. D., and C. V. Riley.] Bugs in alcohol. <Amer. 
Ent., May, 1869, v. 1, p. 187. 
Answer to inquiry of D. P. Smith; alcohol as a moans of preserving insects. 
606. [Walsh, B. D., and C. Y. Riley.] Borer in plum-twig. <Amer. 
Ent., May, 1869, v. 1, p. 187. 
Answer to inquiry of W. Colwell; Elaphidion parallelam [ = villosum~\ bred 
from plum-twigs; it does not prune the twig. See No. 559. 
607. [Walsh, B. D., and C. Y. Riley.] Eggs of cut-worm moth. 
<Amer. Ent., May, 1869, v. 1, p. 188, fig. 131. 
Answer to inquiries of G. Pauls, T. A. Thorp, and E. S. Foster; characters 
and figure of eggs of Agrotis inermis [=sawcia]; characters and habits of 
the larva. 
608. [Walsh, B. D., and C. Y. Riley.] Snow fleas. <Amer. Ent., 
May, 1869, v. 1, p. 188. 
Answer to inquiry of H. H. G. Bradt; habits and food of Podura [= Ach- 
orutes ] nivicola. 
609. [Walsh, B. D., and C. Y. Riley.] Fuzzy galls on blackberry- 
twigs. <Amer. Ent., May, 1869, v. 1, p. 188. 
Answer to inquiry of J. Huggins; characters of Diastrophus cuscutceformis 
and its gall. 
610. [Walsh, B. D., and C. Y. Riley.] Pithy galls on blackberry- 
twigs. <Amer. Ent., May, 1869, v, 1, p. 188. 
Answer to inquiry of T. W. Gordon ; characters of the gall made by Diastro- 
phu8 nebulosus. 
611. [Walsh, B. D., and C. Y. Riley.] Moth eggs. <Amer. Ent., 
May, 1869, v. 1, p. 188. 
Answer to inquiries of A. M. Shute and of J. Huggins; characters f the eggs 
of an undetermined moth. 
612. [Walsh, B. D., and C. Y. Riley.] Horse hair snakes. <Amer. 
Ent., May, 1869, v. 1, p. 188. 
Answer to inquiry of A. M. Abbott; characters and habitats of Gordiaccea. 
613. [ Walsh, B. D., and C. Y. Rile y.J Imitative butterflies. <Amer. 
Ent., June, 1869, v. 1, pp. 189-193, figs. 132-134. 
Immunity of Danaidce from and liability of Pieridce to the attacks of preda¬ 
tory animals; mimicry of Danaidce by Pieridce and of Danais archippus by 
Limenitis disippus; hibernating habits and description of the larva of the 
latter, with figures of its larva, chrysalis, imago, and hibernaculum ; figure 
of Danais archippus; theory of the origin of mimicry. 
614. [Walsh, B. D., and C. Y. Riley.] Cabbage-worms upon gilly¬ 
flowers. <Amer. Ent., June, 1869, v. 1, p. 199. 
Habits and food-plants, seasons, and synonyms of Plntella crudferarum. 
615. [Walsh, B. D., and C. Y. Riley.] “Wasps and their habits.” 
<Amer. Ent., June, 1869, v. 1, p. 200. 
Comments on letter of S. S. Rathvon; species having essentially different 
habits though externally indistinguishable should be considered specific¬ 
ally distinct. 
616. [Walsh, B. D., and C. Y. Riley.] The social wasps. <Amer. 
Ent., June, 1869, v. 1, p. 201. 
Comments on paper by D. A. A. Nichols; habits of Vespa erabro. 
