196 
BIBLIOGRAPHY OF ECONOMIC ENTOMOLOGY. 
1482. Riley, C. V.—Continued. 
The grape Phylloxera, Phylloxera vastatrix . 157 
The injuries not great in Missouri in 1875, 157—Completion of its 
natural history, 157—Where the winged female lays her eggs, 
157, 161—The sexed individuals illustrated, 158—Description of 
the true female, 159—Description of the impregnated egg, 159, 
162—Practical considerations growing out of these latest discov¬ 
eries, 163—Decortication of the hark to destroy the impregnated 
egg, 163—The insect maybe imported from one country to another 
on cuttings asivell as rooted plants, 163—Best time to attack the 
root-lice, 163—Phylloxera ravages in California, 163—Great de¬ 
struction around Sonoma, 164—Need,of action by the State au¬ 
thorities, 164—Occurrence of Phylloxera in the Southern States, 
164—Report of committee appointed by the American Pomologi- 
cal Society, 165—Its occurrence iu Georgia, 166, 167—American 
grape-vines in Europe, 167—Large demand for our vines, 167— 
The American vines nourishing in Southern France where the 
European varieties perish, 167—The orders for some varieties 
exceeded the supply, 168—Probable future demand, 168. 
INNOXIOUS INSECTS. 
The Yucca borer, Megathymus yuccce .?. 169 
The only North American butterfly whose larva has the boring 
habit, 169—The arbitrary nature of classificatory divisions, 170— 
Butterflies and moths not easily separated, 170—Biological his¬ 
tory of the species, 171—Illustrations of all states, 171, 172— 
Habits'of the larva, 171, 172,181—Mode of pupation, 172,180— 
Flight of the imago, 173,181—Position of wings when the imago 
rests or walks, 173—Bibliographical notes, 173—Detailed descrip¬ 
tions of the different states, 174,175,181—Structural characters 
illustrated, 175—Affinities of the species, 176—It is a true but¬ 
terfly, belonging to the hesperians, 178—Characters of the cast- 
nians contrasted with those of hesperiaus, 176, 177, 178—In 
classification it is better to widen than restrict in the higher 
groups, 179—Euemies of the Yucca borer, 179—Concluding re¬ 
marks, 179—Unsafe to describe species from mere drawings, 179. 
noxious insects —Continued. 
Supplementary notes on the army-worm, Leucania unipuneta - 182 
Completion of its natural history, 182—Oviposition of the moth 
described, 183—Eggs described, 183—Conclusions previously ar¬ 
rived at verified, 184—Description of the different larval stages, 
184. 
1483. Riley, C. Y. Is the Colorado potato-beetle poisonous ? <Col- 
maa’s Rural World, 7 June, 1876. S.-b. No. 10, pp. 164-165. 
Extract from the 8th Ann. Rept. State Ent. Mo., pp. 10-12; abstract and 
critical review of Grote and Kayser’s “Are potato-bugs poisonous con¬ 
siders the experiments inconclusive. 
1484. [Riley, C. V.] The eggs of the army-worm. <Colinan’s Rural 
World, 7 June, 1876. S.-b. No. 10, p. 170. Reprint: <Trans. 
Acad. Sci. St. Louis, June, 1876, v. 3, p. 211 Proc. <Amer. 
Nat., August, 1876, v. 10* pp. 508-509. 
Reasous why eggs of Leucania unipuneta have not been observed heretofore ; 
verification of author’s conclusions as to the probable method of oviposi¬ 
tion of this species; description of eggs and young larvte. 
