204 BIBLIOGRAPHY OF ECONOMIC ENTOMOLOGY. 
1547. [Riley. C. V.] Snake-worms. <Colman , s Rural World, 15 No¬ 
vember, 1876. S.-b. No. p. 10, p. 220. 
Answer to letter of J. Armstrong; description of larvte of Sciara sp.; their 
habit of moving in congregations; their abode and enemies. 
1548. Riley, C. Y. Locust eggs. <Colman ? s Rural World, 15 Novem¬ 
ber, 1876. S.-b. No. 10, p. 223. 
Answer to letter of C. T.; female Acrididce lay more than one litter of eggs; 
the occurrence of egg-like parasites in males has led to the supposition that 
the males bore eggs. 
1549. Riley, C. Y. Locust flights east of the Mississippi. <Co1man’s 
Rural World, 22 November, 1876. S.-b. No. 10, pp. 211-212; 
221-222; 223-225. Reprint: <Sci. Amer., 16 December, 1876 
[v. 49], u. s., v. 35, p. 392, 2 figs. S.-b. No. 10, pp. 216,217. 
<Trans. Kans. Acad. Sci., 1877, v. 5, pp. 62-64. 
Limitation of plants and animals to certain geographical regions; regions in 
which alone Caloptenus spretus survives; species confounded with C. spre¬ 
tus ; occurrence of swarms of Acridium americanum in Ohio; description, 
geographical distribution, and ravages of the same; swarms of Caloptenus 
differ entialis, C. atJanis, and C. femur-rubrum in Illinois; ravages of the same. 
The reprint in the Sci. Amer. contains figures of Caloptenus spretus and 
Acridium americanum. 
1550. Riley, C. Y. Locusts agaiu. <N. Y. Tribune, 22 November, 
1876. S.-b. No. 10, p. 222. 
Effects of winter on the vitality of the eggs of Acrididce. 
1551. Riley, O. Y. The army-worm; its natural history complete. 
<Sci. Amer., 9 December, 1876 [v. 49], n. s., v. 35, p. 372, 4 tigs. 
S.-b. No. 10, pp. 217-219. Reprint, with slight changes: 
<Proc. Amer. Assoc. Adv. Sci. for 1876, 1877, v. 25, pp. 279- 
283, 2 tigs. 
Geographical distribution of Leucania unipuncta ; figures of all stages and of 
ovipositor of female ; place and manner of oviposition; description of eggs 
and young larvae; number of annual broods; summary of the natural his¬ 
tory of this species. 
1552. Riley, O. Y. The apple-bark louse. <Ca. Farmer, 15 Decem¬ 
ber, 1876. S.-b. No. 14, p. 50. 
Seasons, habits, and ravages of Mytilaspis pomicorticis [=pomori(»i] ; descrip¬ 
tion of young larvae ; of males and females and formation of scales. 
1553. Riley, O. Y. The apple maggot; a formidable enemy. <N. Y. 
Semi-weekly Tribune, 15 December, 1876. S.-b. No. 14, pp. 7-8. 
Answer to letter of P. M. Augur; description of larva and imago of Trypeta 
pomonella ; ravages, food-plants, habits, and means against the same; lit¬ 
erature of the subject. 
1554. Riley, C. Y. Entomological notes; confounding friend with foe. 
<Colman 7 s Rural World, 20 December, 1876. S.-b. No. 14, p. 4. 
Description of scales and eggs of Diaspis harrisii [= Chionaspis furfur us] aud 
of colors of larva, pupa, and imago of Chilocorus bivulnerus ; ravages of the 
Diaspis ; habits and usefulness of the Chilocorus. 
