366 
BIBLIOGRAPHY OF ECONOMIC ENTOMOLOGY. 
2398. Riley, C. Y. [Introduction of the Hessian-fly into England.] 
<Trans. Ent. Soc. London, [December], 1887, pp. 45-48, Proc. 
Discussion of the date of introduction of Cecidomyia destructor into America 
and England; concludes from a study of the historical evidence, the dis¬ 
tribution and parasites of the insect, that it was probably introduced into 
England about three or four years ago. 
2399. Riley, C. Y. Poisonous insects. <Reference Handbook of the 
Medical Sciences, 1887, v. 5, pp. 741-760, figs. 2971-3020. 
An exhaustive illustrative review of the Arachnida, Myriapoda, and Hexapoda 
Avhich secrete a poison injurious to man ; descriptions of their life-histories; 
the manner in which the injury is inflicted and the remedies for the same. 
2400. Riley, O. Y. The problem of the hop-plant louse [Phorodon 
liumuli , Schrank] in Europe and America. <Rept. Brit. Assoc. 
Adv. Sci., 1887, pp. 750-753. Separate: <pp. 1-3. See: 
<Nature, 13 October, 1887, v. 36, pp. 566-567. <Gardener’s 
Chronicle, 17 September, 1887. S.-b. No. 61, pp. 333-334. 
Life-hahits of Phorodon humuli; effects of extreme heat and of meterological 
conditions; natural enemies and means against the Phorodon. 
2401. Riley, C. Y. On leery a purchasi, an insect injurious to fruit 
trees. <Rept. Brit. Assoc. Adv. Sci., 1887, p. 767. Separate:. 
<p. 1. See: <Nature, 20 October, 1887, v. 36, p. 592. 
Summary statement of food-plants, original home, synonomy, and means 
against Icerya purchasi. 
2402. Riley, C. Y. On the luminous larviform females in the Pliengo- 
dini. <Rept. Brit. Assoc. Adv. Sci., 1887, pp. 760-761. Sep¬ 
arate: <pp. 1-2. See: <Entom. Arner., September, 1887, v. 3, 
p. 107. <Proc. Amer. Assoc. Adv. Sci., 1887 [May, 1888], v. 36, 
p. 262. 
Rdsumd of facts relating to the history, characters, and life-habits of the 
luminous larviform females in the Phengodini; hearing of these facts on 
the theory of evolution. 
2403. Riley, C. Y. [Scale on Euonymus latifolia ?] <Sci. Amer., 14 
January, 1888, v. 58, p. 27. S.-b. No. 61, p. 148. 
Means against Chionaspis euonymi aDd other Coccidw ; formulm of kerosene 
emulsions. 
2404. [Riley, C.Y.] [Larval habits of Lixus.} <Proc. Ent. Soc. Wash., 
[13 March], 1888, v. 1, p. 33. 
Lixus macer bred from stems of Chenopodium hyhridum and from Uelianthus ; 
larva of L. parcus a gall producer on stems of Amelanchler. 
2405. [Riley, C. Y.] [Girdling habits of Pcedisca ofjfuscata.] <Proc. 
^nt. Soc. Wash., [13 March], 1888, v. 1, p. 33. . 
Larva of P. obfuscata spins a web over the orifice at the amputated end. 
2406. [Riley, C. Y.] [Early stages of Apliorista vittata and Epipocus 
punctatus.] <Proc. Ent. Soc. Wash., [13 March], 1888, v. 1, 
p. 37. 
Comparative characters between corresponding stages of the two species. 
