BIBLIOGRAPHY OP ECONOMIC ENTOMOLOGY. 
213 
1583. Riley, C. V.—Continued. 
2. Rose-chafer; answer to letter of I. M. H.; means against Macrodactylus 
subspinosus. 
3. Bark-louse; answer to letter of J. L. K.; seasons and ravages of and means 
against Mytilaspis pomicorticis [ =pomorum ~\. 
4. Flea-beetle; answer to letter of J. E. R.; habits, ravages, and means 
against Graptodera \_=Haltica~\ chalybea. 
1584. Riley, C. Y. The Hellgrammite. <Sci. Amer., 23 June, 1873 
[v. 50], n. s., y. 36, pp. 392-393, 3 figs. 
Structure and habits of Corydahis cornutus, description and figures of egg- 
masses, eggs, larvse, pupa, and imagos ; adaptations of sexual structure to 
conditions; figure and description of eggs of Belostomd grande [= ameri- 
canum ]. 
1585. Riley, C. Y. The ’hopper in Iowa. Report by Professor Riley, 
Chief of the U. S. Entomological Commission. <Chicago 
Daily Tribune, 4 July, 1877, v. 32, p. 3. S.-b. No. 14, pp. 112- 
114. Extract: <N. Y. Tribune, 4 July, 1877. S.-b. No. 14, p. 
128. 
Report to the governor of Iowa as to the observed and anticipated ravages of 
Caloptenus spretus in southwestern Iowa in 1877; the young locusts mostly 
destroyed by the weather; their natural enemies and the efforts of man ; 
localities infested; recommends diversification of crops; summary of means 
against the young locusts; claims for the first recommendation of proper 
ditching ; description of apparatus for catching and killing locusts. 
1586. Riley, C. Y. Strawberry worm and remedy. <N. Y. Tribune, 
18 July, 1877. S.-b. No. 14, p. 231. 
Description of egg, larva, and imago, habits of and means against Emphytus 
[= Harpiphorus~\ maculaius. 
1587. Riley, C. Y. Fighting the Hessian-fly. <N. Y. Tribune, 18 
July, 1877. S.-b. No. 14, pp. 232-233. Reprint: <Colman’s 
Rural World, 5 December, 1877. S.-b. No. 14, pp. 268-269. 
Habits, seasons, parasites, introduction, spread, and ravages of and means 
against Cecidomyia destructor j description of eggs and larva. 
1588. Riley, C* Y. The grasshopper. Considered practically and sci¬ 
entifically with a retrospective and prospective glance at his 
history. <Dailv Rocky Mountain News [Denver, Colo.], 1 
August, 1877, v. 18, p. 4. S.-b. No. 14, pp. 81-84; 110-112. Re¬ 
print: <Colorado Farmer, 2 August, 1877, v. 9, No. 31, p. 4. 
<Chicago [Ill.] Daily Tribune, 7 August, 1877, v. 32, p. 7. S.-b. 
No. 14, pp. 84-86. 
Observations on the past and present conditions of Caloptenus spretus in 1877 
in the regions invaded by it; work of its enemies and parasites ; complica¬ 
tion of the locust problem in Colorado owing to the climate of the State; 
prospects of future injury; means against the locusts in Colorado; work 
of the U. S. Entomological Commission. 
1589. Riley, C. Y. In reference to wheat-worms. <Prairie Farmer, 
11 August, 1877. S.-b. No. 14, p. 127; No. 20, p. 86. 
Critical review of C. Thomas’ “A wheat insect” (Prairie Farmer, 21 July, 
1877), with correction of some obscurities in regard to Meromyza americana 
and Gortyna nitela. 
