BIBLIOGRAPHY OF ECONOMIC ENTOMOLOGY. 
307 
2209. Riley, C.Y. Some recent discoveries in reference to Phylloxera. 
<Science, 7 September, 1883, v. 2, p. 336. S.-b. No. 42, pp. 68, 
69. Reprint: <Proc. Amer. Assoc. Adv. Sci. for 1883, 1884, 
v. 32, p. 320. Separate: <Salem, Mass., July, 1884, p. 320. 
<Amer. Nat., December [28 NovemberJ, 1883, v. 17, p. 1288. 
Summary of tlie cycle of development of the genus Phylloxera ; character of 
the gall of P. spinosa and location of the impregnated egg of the species. 
2210. Riley, C. Y. The Psyllidcc of the United States. <Science, 7 
September, 1883, v. 2, p. 337. S.-b. No. 42, pp. 67-68. Re¬ 
print: <Proc. Amer. Assoc. Adv. Sci. for 1883, 1884, v. 32, p. 
319. Separate: <Salem, Mass., July, 1884, p. 319. 
Characteristics and economic importance of Psyllidw status of the present 
knowledge of this family in the United States; list of new genera and 
species; food-plants of the same; characteristics-of the eggs and young of 
Psyllidce. , 
2211. Riley, C. V. Improved method of spraying trees for protection 
against insects. <Science, 14 September, 1883*, v. 2, p. 378. 
S.-b. No. 42, p. 68. Reprint: <Proc. Amer. Asoc. Adv. Sci. 
for 1883, 1884, v. 32, pp. 466-467. Separate: <Salem, Mass., 
July, 1884, pp. 466, 467. 
Description of apparatus, especially of “ cyclone nozzle ” and adjustable hose; 
mention of insecticide substances. 
Note. —Nos. 2209-2211 were issued as a separate, Salem, 1884. 
2212. [Riley, C. Y.] Entomology at Minneapolis. <Amer. Nat., 1883, 
v. 17: October [17 September], pp. 1068-1070; November [19 
October], pp. 1169-1174. 
Minutes of the meetings of the entomologists at the session of the American 
Association for the Advancement of Science; reorganization of the entomo¬ 
logical club ; election of officers and change in the constitution; abstracts 
of papers read. 
2213. Riley, O. Y. Notes on Pccdisca scudderiana. <Amer. Nat., Oc¬ 
tober [17 September], 1883, v. 17, pp. 1069-1070. 
Habits and variation of Pceclisca scudderiana ; difference between the gall of 
this insect and that of Gelechia gallcesolidaginis. 
2214. Riley, C. Y. A myrmecophilous lepidopteron. <Amer. Nat., 
October [17 September], 1883, v. 17, p. 1070. 
Larva of Helia americalis found in nests of Formica rufa ; this species the only 
one of the Lepidoptera known to develop in ants’ nests. 
2215. [Riley, C. Y. | Enemies of the egg-plant. <Amer. Nat., Octo¬ 
ber [17 September], 1883, v. 17, p. 1070. 
Extract from a letter of A. (Emler, proving that the occurrence of Cassida 
texana and Doryphora juncta on Solarium melongena is not accidental or tem¬ 
porary. 
2216. [Riley, C. Y.] The periodical Cicada in southeastern Massachu¬ 
setts. <Amer. Nat., October [17 September], 1883, v. 17, p. 1071. 
Note to paper of C. E. Bessey; Cicada [ — Tibicen] septendecim at Martha’s 
Vineyard, Mass., in June, 1883, the precursor to septendecim Brood XXI 
which will appear in North Carolina and Virginia as well as Martha’s 
Vineyard in 1884; accelerated specimens of the same brood received from 
Loudoun County, Va., recently. 
