BIBLIOGRAPHY OF ECONOMIC ENTOMOLOGY. 
279 
1994. Riley, C. V.—Continued. 
insects, their periodicity and distribution ; no fear that C. spretus will com¬ 
mit great ravages this year; recommendation of a system of observations 
and warnings by the United States Signal Service to guard against unex¬ 
pected inroads of G. spretus. 
1995. Riley, C. V. The caterpillar nuisance. <Evening Star [Wash¬ 
ington, D. C.], 24 June, 1881, v. 57, No. 8802, p. 3. S.-b. No. 
23, p. 152; No. 42, p. 13. Reprint: <Amer. Nat., September 
[23 August], 1881, v. 15, pp. 747-748, 1 fig. 
Natural history of Hyphantria textor \_—cunea~\ ; means against it; methods 
of applying poisoned liquids to trees. 
1996. Riley, C. Y. Directions for cultivating pyrethrum for insect 
powder. <Gardener’s Mo. and Hortic., June, 1881, v. 23, pp. 
172-173. S.-b. No. 23, p. 153. 
Directions for raising Pyrethrum cineraricefolium from seed; climate not favor, 
able to the growth of P roseurn ; preparation of these plants for the de¬ 
struction of insects. 
1997. Riley, C. Y. Cotton-worms and Cicadas. Prof. Stelle’s logic! 
<Selma [Ala.] Times, 19 July, 1881. S.-b. No. 24, pp. 44-45; 
No. 39, p. 123. 
Criticism of statements of J. P. Stelle; impossibility of exterminating Aletia 
xylina ; waves of destructiveness; Cicada [= Tibicen'] tredecim abundant in 
sections of Alabama, as predicted. 
1998. Riley, C. Y. The Rocky Mountain locust alias Western grass¬ 
hopper. <Amer. Agric., July, 1881, v. 40, pp. 283-284, 6 figs. 
S.-b. No. 23, p. 142. 
Summary of facts concerning the egg-laying development, habits, food-plants, 
destructive powers, migration, flight, and enemies of and means against 
Caloptenus spretus ; figures of the eggs of the insect in all stages, of the 
manner of oviposition, and of pans for the destruction of the locusts; pros¬ 
pects of future injury. 
1999. Riley, C. Y. Lepidopterological notes. <Papilio, July, 1881, v. 
1, pp. 106-110. 
Advance print of extracts from Bull. No. 6, U. S. Entomological Commission, 
pp. 56-58, 78, 82-83. See No. 2026 for synopsis of contents. 
2000. Riley, C. Y. Further notes on the pollination of Yucca and on 
Pronuba and Prodoxus. <Proc. Amer. Assoc. Adv. Sci. for 
1880, 14 October, 1881, v. 29, pp. 617-639, 16 figs. Separate: 
<[Salem, Mass, July, 1881], 23 pp., 16 figs. 
Recapitulation of published observations on Pronuba yuccasella and Prodoxus 
decipiens, with additional observations and references to literature; habits 
and functions of the two species ; descriptions and figures of the generic 
characters of Pronuba, Prodoxus, and Hyponomeuta, and of the specific char¬ 
acters of Pronuba yuccasella, P. maculata n. sp., Prodoxus decipiens, P. inter- 
medius n. sp., P. marginatus n. sp., P. cinereus n. sp., P. wnescens n. sp., 
Hyponomeuta malinella, and H. multipunctella, especially the structure of the 
ovipositor and the male characters, and the venation of the wings ; discus¬ 
sion of the structure of the ovipositor in Lepidoptera characterization of 
the new family Prodoxidoe to comprise Pronuba and Prodoxus ; generic and 
specific synonymy; reply to criticism of T. Meehan ; list of insects frequent¬ 
ing Yucca; syuonymical list of the described Prodoxice. 
