BIBLIOGRAPHY OF ECONOMIC ENTOMOLOGY. 
303 
2167. Kiley, G. V. Number of molts and length of larval life as in¬ 
fluenced by food. <Amer. Nat., May [18 April], 1883, v. 17, 
pp. 547-548. 
Variability iu habits and characters of insects; periods and number of molts 
observed iu larvae of Tenebrio molitor, T. obscurus and Trogoderma tarsale ; 
conclusion that insufficient food retards development and occasions frequent 
molting. 
2168. [Riley, C. V.J Entomological notes. <Amer. Nat., May [18 
April], 1883, v. 17, pp. 549-550. 
Brief notes on recent publications. 
2169. Riley, C. Y. Larval stages and habits of the bee-fly Hirmoneura. 
<Science, 27 April, 1883, v. 1, pp. 332-334, figs. 1-3. S.-b. No. 
42, p. 52. 
Summary of the life-history of Hirmoneura obscura condensed from Handlirscti, 
and from Brauer; figures the several stages ; correspondences of the struc¬ 
ture and early history of the larva; predictions in reference to the larvae of 
Bombyliidce. 
2170. Riley, O. Y. The capitalizing of specific names. <Papilio, 
March [April], 1883, v. 3, p. 62. 
Inquiry as to the use and purpose of capitalizing specific names.. See No. 2257. 
2171. Riley, G. Y. Observations on the fertilization of Yucca and on 
structural and anatomical peculiarities in Pronuba and Pro- 
doxus. <Gardener ? s Mo. and Hortic. April, 1883, v. 25, pp. 118- 
119. S.-b. No. 51, p. 122^. Reprint: <Proc. Amer. Assoc. Adv. 
Sci. for 1882,1883, v. 31, pp. 467-468. Separate: <Salem. Mass., 
July, 1883, pp. 467-468. Abstract: <Amer. Nat., February 
[31 January], 1883, v. 17, p. 197. 
Description of the manner in which Pronuba yuccascUa gathers the pollen in 
flowers of Yucca; the work of this species necessary for the fertilization of 
the capsular species of Yucca, the irregularity of whose fruit is due to its 
punctures ; description of the egg and of the manner of oviposition of this 
species. 
2172. Riley, C. Y. The potato-stalk borer. <Rural New Yorker, 12 
May 1883. S.-b. No. 42a, p. 213. 
Answer to inquiry ; life-history and means against Baridius [= Irichobaris'] 
trinotata. 
2173. Riley, C. Y. Jumping seeds and galls. <Proc. TJ. S. Nat. Mus., 
12 May, 1883, v. 5, pp. 632-635, fig. Separate: <[Washington, 
1884], pp. 632-635, fig. 
Description of seeds of “arrow-weed”; their motions caused by larvm of 
Carpocapsa saltitans ; figures of the seeds and of the larva, pupa, and imago 
of the Carpocapsa; habits and seasons of the same; description of the plant 
hearing these seeds; character and motions of the gall of Cynips q.-salta - 
torius. 
2174. Riley, C. Y. Note on cluster-flies. <Proc U. S. Nat. Mus., 12 
May, 1883, v. 5, pp. 636-637. 
Habits of Pollenia rudis ; notice of recorded cases of swarming among the 
Diptera. See No. 2128. 
